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              Open Access  
Copyright: The authors. This article is an open access 
article licensed under the terms of the Creative Commons Attribution License 
 
 
(http://creativecommons.org/licenses/by/2.0) which permits unrestricted use, 
distribution and reproduction in any medium, provided the work is properly 
cited. 
 
              
              
              Research 
              
              
(Published online: 
              22-09-2015) 
              
              14. Prevalence 
              of Cryptosporidia, Eimeria, Giardia,
              
              and 
              Strongyloides in pre-weaned calves on smallholder dairy farms 
              in Mukurwe-ini district, Kenya - 
              Getrude Shepelo Peter, 
              George Karuoya Gitau, Charles Matiku Mulei, John Vanleeuwen, 
              Shauna Richards, Jeff Wichtel, Fabienne Uehlinger and Omwando 
              Mainga 
              
              Veterinary World, 8(9): 1118-1125   
              
   
                
                
doi: 
              10.14202/vetworld.2015.1118-1125   
              Getrude Shepelo Peter: 
              
              Department of Clinical Studies, Faculty of Veterinary Medicine, 
              University of Nairobi, P.O. Box 29053-00625, Kangemi, Kenya;
              
              
              shepelog@gmail.com 
              George Karuoya Gitau: 
              
              Department of Clinical Studies, Faculty of Veterinary Medicine, 
              University of Nairobi, P.O. Box 29053-00625, Kangemi, Kenya; 
              gkgitau@uonbi.ac.ke 
              Charles Matiku Mulei: 
              
              Department of Clinical Studies, Faculty of Veterinary Medicine, 
              University of Nairobi, P.O. Box 29053-00625, Kangemi, Kenya; 
              cmulei@uonbi.ac.ke John 
              Vanleeuwen: 
              Department of Health Management, Centre for Veterinary 
              Epidemiological Research, Atlantic Veterinary College, University 
              of Prince Edward Island, 550 University Avenue, Charlottetown PEI 
              Canada, C1A 4P3;
              
              
              jvanleeuwen@upei.ca 
              Shauna Richards: 
              Department of Health Management, Centre for Veterinary 
              Epidemiological Research, Atlantic Veterinary College, University 
              of Prince Edward Island, 550 University Avenue, Charlottetown PEI 
              Canada, C1A 4P3;
              
              
              srichards@upei.ca Jeff 
              Wichtel: 
              Department of Health Management, Centre for Veterinary 
              Epidemiological Research, Atlantic Veterinary College, University 
              of Prince Edward Island, 550 University Avenue, Charlottetown PEI 
              Canada, C1A 4P3;
              
              
              jwichtel@upei.ca 
              Fabienne Uehlinger: 
              
              Department of Large Animal Clinical Sciences, Western College of 
              Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, 
              Saskatoon SK Canada, S7N 5B4, Canada;
              
              
              f.uehlinger@usask.ca 
              Omwando Mainga: Department of Public Health, Pharmacology, and 
              Toxicology, Faculty of Veterinary Medicine, University of Nairobi, 
              P.O. Box 29053-00625, Kangemi, Kenya;
              
              alfredomwando@gmail.com   
              Received: 07-04-2015, Revised: 16-08-2015, Accepted: 23-08-2015, 
              Published online: 22-09-2015   
              
              
              Corresponding author: 
              
              
              Getrude Shepelo Peter, e-mail: shepelog@gmail.com 
 
              Citation:Peter SG, Gitau GK, 
              Mulei CM, Vanleeuwen J, Richards S, Wichtel J, Uehlinger F, Mainga 
              O (2015) Prevalence of Cryptosporidia, Eimeria, Giardia,
              and 
              Strongyloides in pre-weaned calves on smallholder dairy farms 
              in Mukurwe-ini district, Kenya, Veterinary World 8(9): 
              1118-1125. 
 
              Abstract 
 Aim:
              Gastrointestinal diseases are among the leading causes of calf 
              morbidity and mortality in Kenya and elsewhere. This study was 
              undertaken to determine the prevalence of Cryptosporidia, 
              Eimeria, Giardia, and Strongyloides in calves on 
              smallholder dairy farms (SDF) in Mukurwe-ini District, Nyeri 
              County, Kenya. These infections have been associated with economic 
              losses by decreased growth rates, decreased productivity, and 
              increased susceptibility to other diseases. 
              Materials and Methods: An observational study was conducted on 
              109 farms in Mukurwe-ini District, Nyeri County, Kenya, where 220 
              calf fecal samples (each calf at 4 and 6 weeks of age) from 110 
              calves (1 set of twins) were collected and analyzed for 
              Cryptosporidia, Eimeria, Giardia, and helminth 
              parasites. 
              Results: Eimeria oocysts, Cryptosporidia oocysts, 
              and Strongyloides eggs were detected in the fecal samples 
              examined, but no Giardia cysts were found. The overall 
              period prevalence of Eimeria, Cryptosporidia, and 
              Strongyloides was 42.7% (47/110), 13.6% (15/110), and 5.4% 
              (6/110), respectively. The prevalence at 4 weeks of age for 
              Eimeria, Cryptosporidia, and Strongyloides was 30.0% 
              (33/110), 8.2% (9/110), and 3.7% (4/109), respectively, while the 
              prevalence at 6 weeks of age was 20.2% (22/109), 6.5% (7/107), and 
              2.7% (3/110), respectively. There was, however, no significant 
              difference in the prevalence at 4 and 6 weeks (p>0.05). 
              Conclusion: Findings from this study show that Eimeria, 
              Cryptosporidia, and Strongyloides, are prevalent in the 
              study area and indicate the need to adopt optimal management 
              practices to control infections in calves.  
              Keywords: Cryptosporidia, Eimeria, 
              Giardia, pre-weaned calves, smallholder dairy farms, 
              Strongyloides. 
 
              References 
 
                
                  | 1. Gitau, G.K., Aleri, J.W., Mbuthia, P.G. and Mulei, C.M. 
                  (2010) Causes of calf mortality in peri-urban area of Nairobi, 
                  Kenya. Trop. Anim. Health Prod., 42(8): 1643-1647. http://dx.doi.org/10.1007/s11250-010-9614-2
 PMid:20526675
 |  
                  |  |  
                  | 2. Achá, S.J., Kühn, I., Jonsson, P., Mbazima, G., Katouli, M. 
                  and Möllby, R. (2004) Studies on calf diarrhea in Mozambique: 
                  Prevalence of bacterial pathogens. Acta Vet. Scand., 45(1-2): 
                  27-36. http://dx.doi.org/10.1186/1751-0147-45-27
 PMCid:PMC1821001
 |  
                  |  |  
                  | 3. Constable, P.D. (2004) Antimicrobial use in the treatment 
                  of calf diarrhea. J. Vet. Intern. Med., 18: 8-17. http://dx.doi.org/10.1111/j.1939-1676.2004.tb00129.x
 PMid:14765726
 |  
                  |  |  
                  | 4. Foster, D.M. and Smith, G.W. (2009) Pathophysiology of 
                  diarrhea in calves. Vet. Clin. N. Am. Food A., 25(1): 13-36. http://dx.doi.org/10.1016/j.cvfa.2008.10.013
 PMid:19174281
 |  
                  |  |  
                  | 5. El-Naker, Y.F.I., El-Sawalhy, A.A., Youssef, M. A. A. and 
                  Zeidan, S.M. (2007) Some studies on neonatal calf diarrhea in 
                  Egypt, causative agents and some epidemiological aspects. 
                  Bull. Anim. Health Prod. Afr., 56: 161-190. |  
                  |  |  
                  | 6. Gillhuber, J., Rügamer, D., Pfister, K. and Scheuerle, M.C. 
                  (2014) Giardiosis and other enteropathogenic infections: A 
                  study on diarrhoeic calves in Southern Germany. BMC Res. 
                  Notes, 7: 112. Available 
                  fromhttp://www.biomedcentral.com/1756-0500/7/112. http://dx.doi.org/10.1186/1756-0500-7-112
 |  
                  |  |  
                  | 7. Geurden, T., Claerebout, E. and Vercruysse, J. (2005) 
                  Protozoan infection causes of diarrhea in calves. Tijdschr. 
                  Diergeneeskd., 130(23): 734-737. PMid:16363207
 |  
                  |  |  
                  | 8. Waruiru, R.M., Kyvsgaard, N.C., Thamsborg, S.M., Nansen, 
                  P., BÖgh, H.O., Munyua, W.K. and Gathuma, J.M. (2000) The 
                  prevalence and intensity of helminth and coccidial infections 
                  in dairy cattle in Central Kenya. Vet. Res. Commun., 24: 
                  39-53. http://dx.doi.org/10.1023/A:1006325405239
 PMid:10703753
 |  
                  |  |  
                  | 9. Gasbarre, L.C., Leighton, E.A. and Sonstergard, T. (2001) 
                  Role of the bovine immune system and genome in resistance to 
                  gastrointestinal nematodes. Vet. Parasitol., 98: 51-64. 
                  Available from: 
                  http://www.dx.doi.org/10.1016/S0304-4017(01)00423-X. 
                  (28/7/2015). |  
                  |  |  
                  | 10. Gowda, A.K.J., Rekha Hoskene, K., Puttalakshmamma, G.C. 
                  and D'Souza, P.E. (2009) Studies on the prevalence of 
                  cryptosporidiosis in bovines in organized dairy farms in and 
                  around Bangalore South India. Arch. Vet. Sci, 79(5): 461-470. |  
                  |  |  
                  | 11. Swai, E.S. and Schoonman, L. (2010) Investigation into the 
                  prevalence of Cryptosporidium infection in calves among 
                  smallholder dairy and traditional herds in Tanzania. J. Vet. 
                  Intern. Med., 2010: 676451. |  
                  |  |  
                  | 12. Kang'ethe, E.K., Mulinge, E.K., Skilton, R.A., Njahira, 
                  M., Monda, J.G., Nyongesa, C., Mbae, C.K. and Kamwati, S.K. 
                  (2012) Cryptosporidium species detected in calves and cattle 
                  in Dagoretti, Nairobi, Kenya. Trop. Anim. Health. Prod., Suppl 
                  1: S25-S31. http://dx.doi.org/10.1007/s11250-012-0202-5
 |  
                  |  |  
                  | 13. Stantic-Pavlinic, M., Xiao, L., Glaberman, S., Lal, A.A., 
                  Orazen, T., Rataj-Verglez, A., Logar, J. and Berce, I. (2003) 
                  Cryptosporidiosis associated with animal contact. Wien. Klin. 
                  Wochenschr., 115(3-4): 125-127. http://dx.doi.org/10.1007/BF03040292
 |  
                  |  |  
                  | 14. Olson, M.E., O'Handley, R., Ralston, B.J., McAllister, 
                  T.A. and Thompson, R.C. (2004) Update on Cryptosporidium and 
                  Giardia infections in cattle. Trends Parasitol., 20(4): 
                  185-191. http://dx.doi.org/10.1016/j.pt.2004.01.015
 PMid:15099558
 |  
                  |  |  
                  | 15. Eastwood, K., Ng, J., Durrheim, D., Massey, P., Walker, 
                  B., Armson, A. and Ryan, U. (2008) Evidence supporting 
                  zoonotic transmission of Cryptosporidium in rural New South 
                  Wales. Exp. Parasitol., 119(1): 192-195. http://dx.doi.org/10.1016/j.exppara.2008.01.010
 PMid:18343369
 |  
                  |  |  
                  | 16. Mtambo, M.M.A., Sebatwale, J.B., Kambarage, D.M., 
                  Muhairwa, A.P., Maeda, G.E., Kusiluka, L.J.M. and Kazwale, 
                  R.R. (1997) Prevalence of Cryptosporidium spp. oocysts in 
                  cattle and wildlife in Morogoro region, Tanzania. Prev. Vet. 
                  Med., 31(3-4): 185-190. http://dx.doi.org/10.1016/S0167-5877(96)01130-0
 |  
                  |  |  
                  | 17. Kang'ethe, E.K., McDermott, B., M'Ibui, G.M., Randolph, 
                  T.F. and Langat, A.K. (2007) Investigation into the prevalence 
                  of bovine cryptosporidiosis among small-holder dairy 
                  households in Dagoretti division, Nairobi, Kenya. East. Afr. 
                  Med. J., 84 Suppl 11: S76-S82. PMid:18338725
 |  
                  |  |  
                  | 18. Siwilia, J., Phiri, I.G., Vercruysse, J., Goma, F., 
                  Gabriels, S., Claerebout, E. and Geurden, T. (2007) 
                  Asymptomatic cryptosporidiosis in Zambia dairy workers and 
                  their household members. Trans. R. Soc. Trop. Med. Hyg., 
                  101(7): 733-734. http://dx.doi.org/10.1016/j.trstmh.2007.01.006
 PMid:17368697
 |  
                  |  |  
                  | 19. Cicek, H., Sevimli, F., Kozan, E., Köse, M., Eser, M. and 
                  Doğan, N. (2007) Prevalence of coccidia in beef cattle in 
                  western Turkey. Parasitol. Res., 101: 1239-1243. http://dx.doi.org/10.1007/s00436-007-0627-3
 PMid:17653768
 |  
                  |  |  
                  | 20. Daugschies, A. and Najdrowski, M. (2005) Eimeriosis in 
                  cattle: Current understanding. J. Vet. Med. B, 45: 417-427. http://dx.doi.org/10.1111/j.1439-0450.2005.00894.x
 PMid:16364016
 |  
                  |  |  
                  | 21. Enermark, H.L., Dahl, J. and Enermark, J.M. (2013) 
                  Eimeriosis in Danish dairy calves – correlation between 
                  species, oocyst excretion and diarrhea. Parasitol. Res. 112 
                  Suppl 1: 169-176. http://dx.doi.org/10.1007/s00436-013-3441-0
 PMid:23765344
 |  
                  |  |  
                  | 22. Matjila, P.T. and Penzhorn, B.L. (2002) Occurrence and 
                  diversity of bovine Coccidia at three. localities in South 
                  Africa. Vet. Parasitol., 2: 93-102. http://dx.doi.org/10.1016/S0304-4017(01)00605-7
 |  
                  |  |  
                  | 23. Sanchez, R.O., Romero, J.R. and Founroge, R.D. (2008) 
                  Dynamics of Eimeria oocyst excretion in dairy calves in the 
                  province of Buenos Aires (Argentina), during their first 2 
                  months of age. Vet. Parasitol., 151: 133-138. http://dx.doi.org/10.1016/j.vetpar.2007.11.003
 PMid:18096320
 |  
                  |  |  
                  | 24. Harpreet, K. and Daljit, K. (2008) Prevalence of 
                  gastrointestinal parasites in domestic animals of Patiala and 
                  its adjoining areas. Vet. Parasitol., 22: 13-17. |  
                  |  |  
                  | 25. Dong, H., Zhao, Q., Han, H., Jiang, L., Zhu, S., Li, T., 
                  Kong, C. and Huang, B. (2012) Prevalence of coccidial 
                  infection in dairy cattle in Shanghai, China. Vet. Parasitol., 
                  8(5): 63-66. http://dx.doi.org/10.1645/ge-2966.1
 |  
                  |  |  
                  | 26. Vercruysse, J. and Claerebout, E. (2001) Treatment versus 
                  non-treatment of helminth infections in cattle: Defining the 
                  thresholds. Vet. Parasitol., 98: 195-214. http://dx.doi.org/10.1016/S0304-4017(01)00431-9
 |  
                  |  |  
                  | 27. Mark-Carew, M.P., Yasin, K., Susan, E.W., Stephanie, S. 
                  and Hussni, O.M. (2010) Incidence of and risks associated with 
                  Giardia infections in herds on dairy farms in the New York 
                  City Watershed. Acta Vet. Scand., 52: 44. Available from: 
                  http://www.actavetscand.com/content/52/1/44. (2/3/2015). |  
                  |  |  
                  | 28. Monis, P.T., Andrews, R.H., Mayrhofer, G. and Ey, P.L. 
                  (1999) Molecular systematics of the parasitic protozoan 
                  Giardia duodenalis. Mol. Biol. Evol., 16: 1135-1144. http://dx.doi.org/10.1093/oxfordjournals.molbev.a026204
 PMid:10486969
 |  
                  |  |  
                  | 29. Trout, J.M., Santrin, M., Greiner, E. and Faver, R. (2005) 
                  Prevalence and genotypes of Giardia duodenalis in post-weaned 
                  dairy calves. Vet. Parasitol., 130(3-4): 177-183. http://dx.doi.org/10.1016/j.vetpar.2005.03.032
 PMid:15925721
 |  
                  |  |  
                  | 30. Khin, K.L. (2007) Prevalence of Cryptosporidium, Giardia 
                  and other gastrointestinal parasites in dairy calves in 
                  Mandalay, Myanmar. MSc Thesis, Chiang Mai University and Freie 
                  Universität Berlin. |  
                  |  |  
                  | 31. Lalle, M., Pozio, E., Capelli, G., Bruschi, F., Crotti, D. 
                  and Cacciò, S.M. (2005) Genetic heterogeneity at the beta-giardin 
                  locus among human and animal isolates of Giardia duodenalis 
                  and identification of potentially zoonotic subgenotypes. Int. 
                  J. Parasitol., 35(2): 207-213. http://dx.doi.org/10.1016/j.ijpara.2004.10.022
 PMid:15710441
 |  
                  |  |  
                  | 32. Thompson, R.C. and Monis, P.T. (2012) Giardia, from 
                  genotype to proteome. Adv. Parasitol., 78: 57-95. http://dx.doi.org/10.1016/B978-0-12-394303-3.00003-7
 PMid:22520441
 |  
                  |  |  
                  | 33. Thompson, R.C. (2004) The zoonotic significance and 
                  molecular epidemiology of Giardia and giardiasis. Vet. 
                  Parasitol., 126(1-2): 15-35. http://dx.doi.org/10.1016/j.vetpar.2004.09.008
 PMid:15567577
 |  
                  |  |  
                  | 34. Thompson, R.C. (2000) Giardiasis as a re-emerging 
                  infectious disease and its zoonotic potential. Int. J. 
                  Parasitol., 30(12-13): 1259-1267. http://dx.doi.org/10.1016/S0020-7519(00)00127-2
 |  
                  |  |  
                  | 35. Maingi, N. and Gichigi, M.N. (1992) Gastrointestinal 
                  nematodes in cattle on four farms in Nyandarua District. Bull. 
                  Anim. Health Prod. Afr., 40: 9-10. |  
                  |  |  
                  | 36. Kváč, L. and Vitovec, J. (2007) Occurrence of 
                  Strongyloides papillosus associated with extensive pulmonary 
                  lesions and sudden deaths in calves on a beef farm in a 
                  highland area of South Bohemia (Czech Republic). 
                  Helminthologia, 44(1): 10-13. http://dx.doi.org/10.2478/s11687-006-0048-3
 |  
                  |  |  
                  | 37. Degefe, H., Abera, C., Yohannes, M. and Tolosa, T. (2011) 
                  Gastrointestinal helminth infections in small-scale dairy 
                  cattle farms of Jimma town, Ethiopia. Ethiop. J. Sci. 
                  Technol., 2(1): 31-37. |  
                  |  |  
                  | 38. Maingi, N. and Njoroge, G.K. (2010) Constraints on 
                  production, disease perceptions and ticks and helminths 
                  control practices on dairy cattle farms in Nyandarua District, 
                  Kenya. Livest. Res. Rural Dev., 22,(8):138. 
                  http://www.lrrd.org/lrrd22/8/main22138.htm (30/3/2015). ???. |  
                  |  |  
                  | 39. Richards, S., VanLeeuwen, J., Shepelo, G., Gitau, G.K., 
                  Kamunde, C., Uehlinger, F. and Wichtel, J. (2015) Associations 
                  of farm management practices with annual milk sales on 
                  smallholder dairy farms in Kenya. Vet. World, Available from: 
                  http://www.veterinaryworld.org/Vol.8/January-2015/18.pdf. 
                  (9/8/2015). |  
                  |  |  
                  | 40. KNBS, (Kenya National Bureau of Statistics). (2009) Kenya 
                  Population and Housing Census Report. Available from: 
                  https://www.international.ipums.org/international/resources/enum_materials_pdf/enum_instruct_ke2009a.pdf. 
                  (2/4/2015). |  
                  |  |  
                  | 41. Mukurwe-ini Strategic Plan. (2012) Available from: 
                  http://www.Mukurwe-ini.net/userfiles/Mukurwe-ini/Constituency/Strategic/Plan.pdf. 
                  (26/2/2015). |  
                  |  |  
                  | 42. Kabaka, W.M., Gitau, G. K., Kitala, P. M., Maingi, N. and 
                  Vanleeuwen, J. (2012) Risk factors associated with 
                  gastrointestinal nematode infections of cattle in Nakuru and 
                  Mukurwe-ini Districts of Kenya. Bull. Anim. Health Prod. Afr., 
                  60: 413-419. |  
                  |  |  
                  | 43. Clarke, S.C. and McIntyre, M. (2001) Acid-fast bodies in 
                  fecal smears stained by the modified Ziehl-Neelsen technique. 
                  Br. J. Biomed. Sci., 58(1): 7-10. PMid:11284227
 |  
                  |  |  
                  | 44. Soulsby, E.J.L. (1982) Helminths, Arthropods and Protozoa 
                  of Domesticated Animals. 7th ed. Bailliere Tindall, London. 
                  p787-792. |  
                  |  |  
                  | 45. PFukenyi, D.M., Mukaratirwa, S., Willingham, A.L. and 
                  Monrad, J. (2007) Epidemiological studies of parasitic 
                  gastrointestinal nematodes, cestodes and coccidian infections 
                  in cattle in the highveld and lowveld communal grazing areas 
                  of Zimbabwe. Onderstepoort J. Vet., 74: 129-142. |  
                  |  |  
                  | 46. Cheesbrough, M. (1981) Medical Manual for Tropical 
                  Countries. 1st ed., Vol. 1. Printed by Stephen Austin and 
                  Sons, London. |  
                  |  |  
                  | 47. Microsoft Corporation. (2010) Available from: https://www.products.office.com/en-us/Excel. 
                  (26/3/2015). |  
                  |  |  
                  | 48. Wymann, M.N. (2005) Calf mortality and parasitism in peri-urban 
                  livestock production in Mali. PhD Thesis. Dissertation. 
                  University of Basel, Germany. Available from: http://www.edoc.unibas.ch/281/1/DissB_7204.pdf. 
                  (20/2/2015). |  
                  |  |  
                  | 49. Tizard, I.R. (2009) Veterinary Immunology. An 
                  Introduction. 8th ed. Saunders Company, Philadelphia, PA. 
                  p224-238. |  
                  |  |  
                  | 50. Xiao, L. and Herd, R.P. (1994) Infection pattern of 
                  Cryptosporidium and Giardia in calves. Vet. Parasitol., 55: 
                  257-262. http://dx.doi.org/10.1016/0304-4017(93)00645-F
 |  
                  |  |  
                  | 51. Thompson, J., Yank, R. and Power, M. (2008) Identification 
                  of zoonotic Giardia genotypes in masupials in Australia. Exp. 
                  Parasitol., 120: 88-93. http://dx.doi.org/10.1016/j.exppara.2008.05.002
 PMid:18579135
 |  
                  |  |  
                  | 52. Hunter, P.R. and Thompson, R.C. (2005) The zoonotic 
                  transmission of Giardia and Cryptosporidium. Int. J. Parasitol., 
                  35: 1181-1190. http://dx.doi.org/10.1016/j.ijpara.2005.07.009
 PMid:16159658
 |  
                  |  |  
                  | 53. Thompson, R.C.A. and Smith, A. (2011) Zoonotic enteric 
                  protozoa. Vet. Parasitol., 182: 70-78. http://dx.doi.org/10.1016/j.vetpar.2011.07.016
 PMid:21798668
 |  
                  |  |  
                  | 54. Abebe, R., Wossene, A. and Kumsa, B. (2008) Epidemiology 
                  of Eimeria infections in calves in Addis Ababa and Debre Zeit 
                  dairy farms, Ethiopia. Int. J. Appl. Res. Vet. M., 6: 24-30. |  
                  |  |  
                  | 55. Priti, M., Sinha, S.R.P., Sucheta, S., Verma, S.B., 
                  Sharma, S.K. and Mandal, K.G. (2008) Prevalence of bovine 
                  coccidiosis at Patna. Vet. Parasitol., 22: 5-12. |  
                  |  |  
                  | 56. Lassen, B. (2009) Diagnosis, epidemiology and control of 
                  bovine coccidiosis in Estonia. PhD Thesis. Estonian University 
                  of Life Sciences. Tartu. |  
                  |  |  
                  | 57. Rehman, T.U., Khan, M.N., Sajid, M.S., Abbas, R.Z., 
                  Arshad, M., Iqbal, Z. and Iqbal, A. (2011) Epidemiology of 
                  Eimeria and associated risk factors in cattle of District Toba 
                  Tek Singh. Pak. Parasitol. Res., 108: 1171-1177. http://dx.doi.org/10.1007/s00436-010-2159-5
 PMid:21110042
 |  
                  |  |  
                  | 58. Munyua, W.K. and Ngotho, J.W. (1990) Prevalence of Eimeria 
                  species in cattle in Kenya. Vet. Parasitol., 35: 163-168. http://dx.doi.org/10.1016/0304-4017(90)90126-V
 |  
                  |  |  
                  | 59. Dawid, F., Amede, Y. and Bekele, M. (2012) Calf 
                  coccidiosis in selected dairy farms of dire Dawa, Eastern 
                  Ethiopia. Glob. Vet., 9(4): 460-464. |  
                  |  |  
                  | 60. Alemayehu, A., Nuru, M. and Belina, T. (2013) Prevalence 
                  of bovine coccidia in Kombolcha district of South Wollo, 
                  Ethiop. J. Vet. Med. Anim. Health, 5(2): 41-45. |  
                  |  |  
                  | 61. Gȕl, A., Ciҫek, M. and Kilinҫ, O. (2008) Prevalence of 
                  Eimeria species, Cryptosporidium species and Giardia species 
                  in calves in the van province. Turk. J. Parasitol., 32(3): 
                  202-204. |  
                  |  |  
                  | 62. McAllister, M.M. (2006) Protozoosis of the calf: Giardia, 
                  Cryptosporidium, Eimeria, Sarcocystis and Neospora. 
                  Proceedings of the 14th World Buiatrics Congress, Nice, 
                  France. |  
                  |  |  
                  | 63. DelCoco, V.F., Córdoba, M.A. and Basualdo, J.A. (2008) 
                  Cryptosporidium infection in calves from a rural area of 
                  Buenos Aires, Argentina. Vet. Parasitol., 158(1-2): 31-35. http://dx.doi.org/10.1016/j.vetpar.2008.08.018
 PMid:18848398
 |  
                  |  |  
                  | 64. Castro-Hermida, J.A., González-Losada, Y.A. and Ares-Mazás, 
                  E. (2002) Prevalence of and risk factors involved in the 
                  spread of neonatal bovine cryptosporidiosis in Galicia (NW 
                  Spain). Vet. Parasitol., 106(1): 1-10. http://dx.doi.org/10.1016/S0304-4017(02)00036-5
 |  
                  |  |  
                  | 65. Ramirez, N.E., Ward, L.A. and Sreevatsan, S. (2004) A 
                  review of the biology and epidemiology of cryptosporidiosis in 
                  humans and animals. Microbes. Infect., 6(8): 773-785. http://dx.doi.org/10.1016/j.micinf.2004.02.021
 PMid:15207825
 |  
                  |  |  
                  | 66. Gow, S. and Waldner, C. (2006) An examination of the 
                  prevalence of and risk factors for shedding of Cryptosporidium 
                  species and Giardia species in cows and calves from western. 
                  Canadian cow-calf herds. Vet. Parasitol., 137(1-2): 50-61. http://dx.doi.org/10.1016/j.vetpar.2005.05.071
 PMid:16472921
 |  
                  |  |  
                  | 67. Nizeyi, J., Cranfield, M. and Graczyk, T. (2002) Cattle 
                  near the Bwindi Impenetrable National Park, Uganda, as a 
                  reservoir of Cryptosporidium parvum and Giardia duodenalis for 
                  local community and free-ranging gorillas. Parasitol. Res., 
                  88(4): 380-385. http://dx.doi.org/10.1007/s00436-001-0543-x
 |  
                  |  |  
                  | 68. Ouchene, N., Ouchene-Khelifi, N.A., Zeroual, F., Benakhla, 
                  A. and Adjou, K. (2004) Study of Giardia spp., Cryptosporidium 
                  spp. and Eimeria spp. infections in dairy cattle in Algeria. 
                  J. Parasitol. Vector Biol., 6(4): 61-65. |  
                  |  |  
                  | 69. Soltane, R., Guyot, K., Dei-Cas, E. and Ayadi, A. (2007) 
                  Cryptosporidium parvum (Eucoccidiorida: Cryptosporiidae) in 
                  calves: Results of a longitudinal study in a dairy farm in 
                  Sfax, Tunisia. Ucla. Sym. Bi., 14(4): 309-312. http://dx.doi.org/10.1051/parasite/2007144309
 |  
                  |  |  
                  | 70. Maldonado-Camargo, S., Atwill, E.R., Saltijeral-Oaxaca, 
                  J.A. and Herrera-Alonso, L. (1998) Prevalence of and risk 
                  factors for shedding of Cryptosporidium parvum in Holstein 
                  Friesian dairy calves in central México. Prev. Vet. Med., 
                  36(2): 95-107. http://dx.doi.org/10.1016/S0167-5877(98)00084-1
 |  
                
                  |  |  
                  | 71. Coklin, T., Farber, J., Parrington, L. and Dixon, B. 
                  (2007) Prevalence and molecular characterization of Giardia 
                  duodenalis and Cryptosporidium species in dairy cattle in 
                  Ontario, Canada. Vet. Parasitol., 150(4): 297-305. http://dx.doi.org/10.1016/j.vetpar.2007.09.014
 PMid:17964724
 |  
                  |  |  
                  | 72. Trotz-Williams, L.A., Wayne, S.M., Kenneth, E.L., Todd, 
                  D., Daryl, V.N. and Peregrine, A.S. (2008) Association between 
                  management practices and within-herd prevalence of 
                  Cryptosporidium parvum shedding on dairy farms in southern 
                  Ontario. Prev. Vet. Med., 83(1): 11-23. http://dx.doi.org/10.1016/j.prevetmed.2007.03.001
 PMid:17481752
 |  
                  |  |  
                  | 73. El-Shazly, A.M., Gabr, A., Mahmoud, M.S.E., Aziz, S.S.A. 
                  and Saleh, W.A. (2002) The use of Ziehl-Neelsen stain, 
                  enzyme-linked immunosorbent assay and nested polymerase chain 
                  reaction in diagnosis of cryptosporidiosis in immuno-competent 
                  - compromised patients. J. Egypt. Soc. Parasitol., 32(1): 
                  155-166. PMid:12049251
 |  
                  |  |  
                  | 74. O'Handley, R.M., Cockwill, C., McAllister, T.A., Jelinski, 
                  M., Morck, D.W. and Olson, M.E. (1999) Duration of naturally 
                  acquired giardiasis and cryptosporidiosis in dairy calves and 
                  their association with diarrhea. J. Am. Vet. Med. Assoc., 214: 
                  391-396. PMid:10023403
 |  
                  |  |  
                  | 75. Singh, B.B., Sharma, R., Kumar, H., Banga, H.S., Aulakh, 
                  R.S., Gill, J.P.S. and Sharma, J.K. (2006) Prevalence of 
                  Cryptosporidium parvum infection in Punjab (India) and its 
                  association with diarrhea in neonatal dairy calves. Vet. 
                  Parasitolo., 140: 162-165. http://dx.doi.org/10.1016/j.vetpar.2006.03.029
 PMid:16647820
 |  
                  |  |  
                  | 76. Maddox-Hyttel, C., Langkjaer, R.B., Enermark, H.L. and 
                  Vigre, H. (2006) Cryptosporidium and Giardia in different age 
                  groups of Danish cattle and pigs-occurrence and management 
                  associated risk factors. Vet. Parasitol., 141(1-2): 48-59. http://dx.doi.org/10.1016/j.vetpar.2006.04.032
 PMid:16797848
 |  
                  |  |  
                  | 77. Kulišić, Z., Aleksi, N., Orvevi, M., Gaji, B. and Tambur, 
                  Z. (2012) Prevalence of gastrointestinal helminths in calves 
                  in Western Serbia. Acta. Vet. Beograd., 62(5-6): 665-673. http://dx.doi.org/10.2298/AVB1206665K
 |  
                  |  |  
                  | 78. Pfukenyi, D.M. and Mukaratirwa, S. (2013) A review of the 
                  epidemiology and control of gastrointestinal nematode 
                  infections in cattle in Zimbabwe. Onderstepoort. J. Vet., 
                  80(1): 12. Available from: http://www.dx.doi. 
                  org/10.4102/ojvr.v80i1.612. (29/3/2015). |  
                  |  |  
                  | 79. Lima, W.S. (1998) Seasonal infection pattern of 
                  gastrointestinal nematodes of beef cattle in minas Gerais 
                  State, Brazil. Vet. Parasitol., 74: 203-214. http://dx.doi.org/10.1016/S0304-4017(97)00164-7
 |  
                  |  |  
                  | 80. Wade, W.E., Mohammed, H.O. and Schaaf, S.L. (2000) 
                  Prevalence of Giardia species, Cryptosporidium parva and 
                  Cryptosporidium murius (C. andersoni) in 109 dairy herds in 
                  five counties of southeastern New York. Vet. Parasitol., 93: 
                  1-11. http://dx.doi.org/10.1016/S0304-4017(00)00337-X
 |  
                  |  |  
                  | 81. Trout, J.M., Santrin, M., Greiner, E. and Faver, R. (2004) 
                  Prevalence of Giardia duodenalis genotypes in pre-weaned dairy 
                  calves. Vet. Parasitol., 124 (3-4): 179-186. http://dx.doi.org/10.1016/j.vetpar.2004.07.010
 PMid:15381298
 |  
                  |  |  
                  | 82. Ralston, B.J., McAllister, T.A. and Olson, M.E. (2003) 
                  Prevalence and infection pattern of naturally acquired 
                  giardiasis and cryptosporidiosis in range beef calves and 
                  their dams. Vet. Parasitol., 114: 113-122. http://dx.doi.org/10.1016/S0304-4017(03)00134-1
 |  
                  |  |  
                  | 83. Davoudi, Y., Garedaghi, Y. and Safarmashaei, S. (2011) 
                  Epidemiology of giardiasis in diarrheic calves in 
                  East-Azerbaijan Province, Iran. J. Anim. Vet. Adv., 10(19): 
                  2508-2510. http://dx.doi.org/10.3923/javaa.2011.2508.2510
 |  
                  |  |  
                  | 84. Slapeta, J. (2007) Cryptosporidium species found in 
                  cattle: A proposal for a new species. Trends Parasitol., 22: 
                  469-474. http://dx.doi.org/10.1016/j.pt.2006.08.005
 PMid:16920029
 |  |