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Bovine leptospirosis: a serological and clinical study
The Veterinary Record
|November 13, 1976
Summary
Antibodies to Leptospira were found in nearly half of the tested cattle. The Hebdomadis serogroup was most prevalent, and only Hebdomadis and Icterohaemorrhagiae infections were linked to clinical signs.
Area of Science:
- Veterinary Immunology
- Bacteriology
- Epidemiology
Background:
- Leptospirosis is a significant zoonotic disease affecting cattle worldwide.
- Various Leptospira serogroups can infect livestock, impacting herd health and productivity.
- Understanding serogroup prevalence is crucial for disease control and prevention strategies.
Purpose of the Study:
- To determine the prevalence of antibodies against different Leptospira serogroups in cattle sera.
- To identify which Leptospira serogroups are most common in the studied cattle population.
- To investigate the association between specific Leptospira serogroups and clinical disease.
Main Methods:
- Serological testing (MAT) was performed on 3600 bovine sera samples.
- Antibody detection targeted serotypes from 10 distinct Leptospira serogroups.
- Statistical analysis was used to determine prevalence and associations with clinical signs.
Main Results:
- Antibodies to at least one Leptospira serogroup were detected in 49.1% (1766/3600) of cattle.
- The Hebdomadis serogroup showed the highest prevalence (41.8% for serotype sejroe).
- Icterohaemorrhagiae (7.7%) and Ballum (7.3%) were the next most common; Hebdomadis and Icterohaemorrhagiae were linked to clinical disease.
Conclusions:
- Leptospira infection is widespread in the surveyed cattle population.
- The Hebdomadis serogroup is the predominant cause of Leptospira seropositivity in this cohort.
- Targeted surveillance and control measures for Hebdomadis and Icterohaemorrhagiae serogroups are warranted due to their association with clinical disease.