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              Open Access  
 
              
              
              
              Research 
              
              
(Published 
				online: 18-09-2016)  
              12. 
				
				
				Histopathological and immunohistochemical 
				approaches for the diagnosis of Pasteurellosis in swine 
				population of Punjab - 
				
				Payal Bhat, Nittin Dev Singh, Geeta Devi Leishangthem, Amninder 
				Kaur, Vishal Mahajan, Harmanjit Singh Banga and Rajinder Singh 
				Brar 
              
              Veterinary World, 9(9): 989-995   
              
   
                
                
doi: 
              
				
				10.14202/vetworld.2016.989-995 
                
				  
				
				Payal Bhat: 
				
				Department of Veterinary Pathology, College of Veterinary 
				Science, Guru Angad Dev Veterinary and Animal Sciences 
				University, Ludhiana -141 004, Punjab, India; dr.payalbhat@gmail.com 
				
				Nittin Dev Singh: 
				
				Department of Veterinary Pathology, College of Veterinary 
				Science, Guru Angad Dev Veterinary and Animal Sciences 
				University, Ludhiana -141 004, Punjab, India; drndsingh@gmail.com 
				
				Geeta Devi Leishangthem: 
				
				Animal Disease Research Centre, Guru Angad Dev Veterinary and 
				Animal Sciences University, Ludhiana- 141 004, Punjab, India; 
				drgeetapatho@gmail.com 
				
				Amninder Kaur: 
				
				Department of Veterinary Pathology, College of Veterinary 
				Science, Guru Angad Dev Veterinary and Animal Sciences 
				University, Ludhiana -141 004, Punjab, India; dramninder90@gmail.com 
				
				Vishal Mahajan: 
				
				Animal Disease Research Centre, Guru Angad Dev Veterinary and 
				Animal Sciences University, Ludhiana- 141 004, Punjab, India; 
				mahajanv17@gmail.com 
				
				Harmanjit Singh Banga: 
				
				Department of Veterinary Pathology, College of Veterinary 
				Science, Guru Angad Dev Veterinary and Animal Sciences 
				University, Ludhiana -141 004, Punjab, India; bangahs3@yahoo.com 
				
				Rajinder Singh Brar: 
				
				Department of Veterinary Pathology, College of Veterinary 
				Science, Guru Angad Dev Veterinary and Animal Sciences 
				University, Ludhiana -141 004, Punjab, India; rsbrar@email.com   
				
				Received: 02-03-2016, Accepted: 06-08-2016, Published online: 
				18-09-2016   
				
              	
              	Corresponding author: 
              	
				
				Nittin Dev Singh, e-mail: drndsingh@gmail.com 
 
              Citation: 
				
				Bhat P, Singh ND, Leishangthem GD, Kaur A, Mahajan V, Banga HS, 
				Brar RS (2016) Histopathological and immunohistochemical 
				approaches for the diagnosis of Pasteurellosis in swine 
				population of Punjab, 
				
				Veterinary World, 
				9(9): 989-995. 
 
              
				Abstract 
 
				
				
				Aim: 
				
				Infectious porcine bronchopneumonia, caused by 
				
				Pasteurella multocida, 
				
				is a widespread disease of major economic significance. Thus, 
				the aim of the present study was to diagnose swine 
				Pasteurellosis using gross, histopathological, and 
				immunopathological approaches in the swine population of Punjab 
				and to compare the efficacy of immunohistochemical (IHC) 
				techniques with conventional diagnostic techniques. 
				
				
				Materials and Methods: 
				
				A total of 71 adult swine lung samples showing gross pneumonic 
				changes were collected along with the associated lymph nodes to 
				carry out the study. The collected samples were then processed 
				for histopathological and IHC studies. 
				
				
				Results: 
				
				Out of the total 71 lung samples, 26 samples were found to be 
				suspected for Pasteurellosis as per the microscopic changes 
				observed, and out of these 26 samples, 16 cases were confirmed 
				to be positive for Pasteurellosis by IHC. Varied macroscopic 
				changes noted in lungs were pneumonic patches with consolidation 
				of many lobes, congestion, and focal hemorrhages. Main lesions 
				associated with lymph nodes were its enlargement and 
				hemorrhages. Histologically, the lung showed fibrinous and 
				suppurative bronchopneumonia, multifocal suppuration, thickening 
				of septa with fibrin combined with cellular infiltration and 
				edema. The higher IHC expression of 
				
				P. multocida 
				
				was seen in the bronchial epithelium besides in alveolar and 
				bronchial exudate. Moreover, on comparing the histopathological 
				and IHC scores which were calculated on the basis of 
				characteristic microscopic lesions and number of antigen 
				positive cells, respectively, a significant positive correlation 
				(r=0.4234) was found. 
				
				
				Conclusion: 
				
				It was concluded that swine population of Punjab is having
				
				
				P. multocida 
				
				infection. The gross and histopathological lesions can be 
				helpful in the preliminary diagnosis of Pasteurellosis but needs 
				to be supplemented by other immunodiagnostic tests. Moreover, 
				IHC technique proved to be a specific, reliable, precise, and 
				rapid technique to supplement these conventional methods of 
				diagnosis for Pasteurellosis. 
				
				Keywords: 
				
				histopathology, immunohistochemical, Pasteurellosis, scoring. 
 
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