STUDIES ON OCCURRENCE OF PULMONARY DISORDERS IN DOGS
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Date
2017-10
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KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR
Abstract
Respiratory symptoms are the prominent manifestations of many diseases which
can be a major cause of mortality and morbidity in dogs. Necropsy and histopathological
examination of the lungs directly point at the underlined pathological process involved in
the disease. Hence, the present study was conducted to record the occurrence of various
pulmonary conditions in dogs, their gross appearance and histopathological features. A
total of 75 representative pulmonary tissue samples with lesions were collected from
dogs. Occurrence of lung lesions was highest among dogs aged between 8-10 years
followed by less than one year old dogs. Male and non-descript dogs were found to be
affected more with pulmonary disorders. Based on gross and microscopical examination,
various pulmonary disorders recorded were congestion, haemorrhage, oedema,
atelectasis, emphysema, bronchitis and bronchiolitis, pneumonia and pulmonary
neoplasms. The different types of pneumonia observed were bronchopneumonia and
interstitial pneumonia. Among the bronchopneumonia, fibrinous and suppurative types
and among the interstitial pneumonia, acute and chronic types were observed. Pulmonary
neoplasms were classified as primary and secondary. Primary neoplasms include
bronchiolar papillary adenoma, bronchioloalveolar papillary adenocarcinoma and
myxosarcoma. Secondary neoplasms include single cases of solid adenocarcinoma of
mammary gland, lymphosarcoma and chemodectoma. Further, miscellaneous conditions
observed were anthracosis and calcification. These lesions were found to be correlated
with various clinically diagnosed conditions of infectious and non-infectious origin as
like canine distemper, renal failure, cardiac failure, parvoviral gastroenteritis and
leptospirosis. Thus, the present study could be concluded that lung is one of the most
commonly affected organ associated with various systemic infections and non-infectious
pathological conditions, suggesting the need for advanced molecular techniques to arrive
at precise diagnosis.