Leptospirosis seropositivity and its serovars among cattle in Northeastern Malaysia

Background: Leptospirosis is a zoonotic disease that infects human and livestock which causes economic losses to the farmers. It has been reported as one of the causes of reproductive failure in cattle and other ruminants, determining abortions,stillbirth, weak newborns, and decrease in their growth rate and milk production.

Aim: The objectives of this study were to determine the leptospirosis seroprevalence and to identify the predominant
infecting serovars among cattle.

Materials and Methods: A cross-sectional study involving 420 cattle from six randomly selected districts in Kelantan was
conducted. A serological test using the microscopic agglutination test was conducted in the Institute of Medical Research with a cutoff titer for seropositivity of ≥1:100.

Results: The overall prevalence of leptospirosis seropositivity among cattle in this study was 81.7% (95% confidence
interval: 63.5, 80.1). The most common reaction obtained with the sera tested was from the serovar Sarawak with 78.8%.

Conclusion: A high seroprevalence of leptospiral antibodies was found among cattle in Northeastern Malaysia. These
findings urge that more studies are required to determine the reasons for the high seroprevalence among the cattle along with its transmission and pathogenicity of the local serovar Sarawak.