Histopathologic lesions in layer chickens and game fowls (Gallus gallus domesticus) with clinical signs of respiratory disease from selected farms in CALABARZON region

Date

6-2016

Degree

Doctor of Veterinary Medicine

College

College of Veterinary Medicine (CVM)

Adviser/Committee Chair

Hope G Rovira

Co-adviser

Helen A. Molina

Abstract

Different organ sample including trachea, lungs, heart, liver, spleen and kidney collected from the seventy layer samples (20 commercial layer farms) and ten gamefowls samples from one farm. All came from different provinces in the CALABARZON region. The main clinical sign in these birds was mainly respiratory in nature. Histopathologic findings were correlated with the gross lesions, bacterial isolation, viral and molecular assays for tentative diagnosis. Primary histopathologic lesions identified in trachea include denuded epithelium and presence of inflammatory cell infiltration in the tracheal mucosa. In lungs, heart, liver, spleen and kidney, the primary microscopic lesions were congestion and presence of inflammatory cells in the parenchyma or interstitium. Histopathologic findings and gross lesions were confirmed using molecular, serological and isolation techniques. Infectious bronchitis infection was confirmed in layer farms 9B and 11R and in gamefowls samples (21B) (Taala22, 2015) Infection was also confirmed in layer samples with bacterial Escherichia coli isolated in the lungs and spleen (Acasio23, 2015). Despite respiratory clinical signs and gross lesions, presence of lesions in non respiratory organs including the heart, liver, spleen and kidney, indicated systemic infection.

Language

English

Location

UPLB College of Veterinary Medicine (CVM)

Call Number

LG 993.5 2016 V4 F73

Document Type

Thesis

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