Related Experiment Videos
Atypical interstitial pneumonia in yearling feedlot cattle
Journal of the American Veterinary Medical Association
|September 1, 1976
Summary
Atypical interstitial pneumonia (AIP) affected 5.3% of necropsied feedlot cattle fatalities in 1974. This condition caused significant cattle deaths, particularly during summer and fall months.
Area of Science:
- Veterinary Pathology
- Animal Health
- Bovine Medicine
Background:
- Feedlot cattle are susceptible to respiratory diseases, impacting herd health and economic outcomes.
- Atypical interstitial pneumonia (AIP) is a significant cause of mortality in cattle, necessitating further investigation into its epidemiology and pathology.
Purpose of the Study:
- To investigate the incidence and pathological characteristics of atypical interstitial pneumonia (AIP) in yearling feedlot cattle.
- To determine seasonal patterns and distribution of AIP within different fattening stages.
Main Methods:
- Weekly surveys of a large yearling feedlot cattle population (407,000 animals) throughout 1974.
- Necropsy of 1,988 fatalities, with specific examination for atypical interstitial pneumonia (AIP).
- Gross and histopathological analysis of pulmonary lesions.
Main Results:
- Atypical interstitial pneumonia (AIP) was diagnosed in 106 (5.3%) of 1,988 necropsied cattle.
- Higher mortality rates associated with AIP were observed during summer and fall seasons.
- Gross lesions predominantly affected caudal lung lobes, with common findings including epithelialization, hemorrhage, and emphysema.
Conclusions:
- Atypical interstitial pneumonia (AIP) represents a notable cause of mortality in feedlot cattle.
- Seasonal variations and specific pathological features of AIP were identified, informing disease management strategies.
- Further research into the etiology and prevention of AIP in cattle is warranted.