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Chlamydiosis in a beef herd
Journal of the South African Veterinary Association
|June 1, 1975
Summary
Chlamydial infections caused significant pre-natal and post-natal losses in a 1972 beef herd study. Organisms were identified in all affected calves across multiple systems, indicating a widespread herd issue.
Area of Science:
- Veterinary Pathology
- Bovine Infectious Diseases
- Microbiology
Background:
- Chlamydial infections pose a significant threat to livestock health.
- Understanding the impact of chlamydiosis in beef herds is crucial for disease management.
Purpose of the Study:
- To document and discuss chlamydial infection in a large beef herd.
- To highlight pre-natal and post-natal losses attributed to chlamydiosis in 1972.
Main Methods:
- Case study of a beef herd experiencing significant losses.
- Demonstration of chlamydial organisms in affected animals.
- Autopsy and serological investigations.
Main Results:
- Pre-natal losses ranged from 3.7% to 12.4% across nine herds.
- Post-natal calf mortality before weaning was between 1.2% and 11.4%, with 70% of deaths in the first three weeks.
- Chlamydial organisms were identified in all pre-natal and post-natal losses.
- Lesions involved multiple organ systems, with a consistent fibrinous inflammatory process observed at autopsy.
- Serological evidence confirmed prior chlamydial presence on the farms.
Conclusions:
- Chlamydial infection was a significant cause of morbidity and mortality in the studied beef herd.
- The infection affected multiple organ systems, leading to substantial economic losses.
- Early detection and intervention strategies are vital for controlling chlamydiosis outbreaks in cattle.