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              Research 
(Published 
online: 29-01-2015) 
              20.   
              Detection of Avibacterium 
              paragallinarum by Polymerase chain reaction from outbreaks of 
              Infectious coryza of poultry in Andhra Pradesh - 
              T. M. Nabeel Muhammad and B. Sreedevi 
              Veterinary World, 8(1): 103-108   
              
   
                
                
doi: 
              10.14202/vetworld.2015.103-108 
                  T. M. 
              Nabeel Muhammad: 
              Department of Veterinary Epidemiology and Preventive Medicine, 
              College of Veterinary Science, Sri Venkateswara Veterinary 
              University, Tirupati, Andhra Pradesh, India; nabeelmaliyakkel@gmail.com B. 
              Sreedevi: Department of Veterinary Epidemiology and Preventive 
              Medicine, College of Veterinary Science, Sri Venkateswara 
              Veterinary University, Tirupati, Andhra Pradesh, India;
              bollinisreedevi@rediffmail.com   Received: 
              18-09-2014, Revised: 15-12-2014, Accepted: 22-12-2014, Published 
              online: 29-01-2015   
              
              
              Corresponding author:
              B. Sreedevi, e-mail: BS: bollinisreedevi@rediffmail.com 
 
              Abstract 
 Aim:
              This study was carried out for the detection of 
              Avibacterium paragallinarum from outbreaks of infectious 
              coryza of poultry 
              Materials and Methods: The polymerase chain reaction (PCR) was 
              standardized for the diagnosis of infectious coryza by using 
              infectious coryza Killed vaccine, ventri biologicals, Pune as 
              source of DNA of A. paragallinarum. Five outbreaks of 
              infectious coryza from Andhra Pradesh were investigated in the 
              present study. A total of 56 infra orbital sinus swabs and 22 
              nasal swabs were tested by PCR. 
              Results: PCR analysis showed 56 positives (71.7%) for 
              infectious coryza out of total 78 samples tested. Of 56 infra 
              orbital sinus swabs tested, 47 were positive (83.9%) and 9 nasal 
              swabs (40.9%) out of 22 tested had given positive results for 
              infectious coryza. Samples collected from birds at acute stage of 
              disease and samples collected before treatment with antibiotics 
              were given better results on PCR. 
              Conclusion: For preventing the economic losses associated with 
              the disease, an early, accurate and rapid diagnosis is essential. 
              PCR is a rapid and highly sensitive diagnostic technique which can 
              substitute conventional cultural examination. 
              Keywords: infectious coryza, polymerase 
              chain reaction, poultry 
 
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