Abstract

VALLEJO TIMARAN, Darío Antonio et al. Histopathological determination of pneumonic patterns of the bovine respiratory complex in the city of Pasto, Colombia. Ces. Med. Vet. Zootec. [online]. 2016, vol.11, n.1, pp.88-99. ISSN 1900-9607.

Bovine Respiratory complex is a respiratory infection caused by the combination of different infeccious agents, compromised host defenses and predisposing factors, with significant morbility, mortality and economic losses. A descriptive, double-blind, transverse study was performed to microscopically characterize the pneumonic patterns of the bovine respiratory complex and relate them with clinical aspects of the disease. A total of 112 samples of lungs from confiscated bovines were taken in the slaughtering house of the city of Pasto, Colombia, which were processed following the paraffin embedding technique and routine haematoxylin-eosin staining. A histopathological description of the pneumonic patterns was done according to distribution and degree of severity, and the lessions were classified according to type of alteration. Interstitial pneumonia was the most common finding (41.1%), followed by bronchial interstitial pneumonia (11.6%). Of the bovines 48.2% were not healthy clinically before sacrifice. The pattern of distribution and inflamattory infiltrate was predominantly mononuclear in interstitial spaces with 41.1%. Chronical alterations were predominant with 60.7%. The results indicate that the bovines in this study are animals with long standing diseases, which have a negative impact in their productive potential and that may be explained by factors such as inadequate sanitary handling, diagnostic failures and clinical abordaje with increased involuntary culling. Clinically, direct and indirect methods are recommended for the diagnosis of respiratory diseases (Serology, PCR).

Keywords : Bovine; molecular diagnosis; pneumonia; pathology.

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