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Peer-reviewed veterinary case report

Leptospira infection and urine shedding in cats in Thailand

By Sprißler, Fabienne et al.·Published in Transboundary and emerging diseases·2019·Clinic of Small Animal Internal Medicine, Germany·View original on PubMed

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Original publication title: Leptospira infection and shedding in cats in Thailand.

Species:
cat

Plain-English summary

A group of outdoor cats in Thailand was tested for a bacteria called Leptospira, which can cause illness in both animals and humans. Out of 260 cats, only 2 were found to have the bacteria in their urine, while 14 had antibodies indicating past exposure to it. Older cats, specifically those aged 4 years and up, were more likely to show signs of infection. Although the overall prevalence was low, these findings suggest that outdoor cats can still pose a risk for spreading leptospirosis to people. More research is needed to understand how cats might contribute to this disease in Thailand.

People also search for: cat leptospirosis symptoms · outdoor cat urine infection risk · how to protect against leptospirosis in cats

Abstract

In Thailand, leptospirosis is considered an emerging disease in humans and animals. Many species can shed pathogenic Leptospira, including domestic cats (felis catus), which might be able to pose a risk to humans. There are no studies on Leptospira infections in cats in Thailand, but in other countries, it was demonstrated that cats can shed pathogenic Leptospira with high prevalences. The aims of this study were to evaluate whether outdoor cats in Thailand shed pathogenic Leptospira in their urine, and to determine antibody prevalence and risk factors associated with Leptospira infection. Two hundred and sixty outdoor cats were prospectively recruited. Urine samples were tested by real-time PCR targeting the lipL32 gene of pathogenic Leptospira. Urine was additionally cultured for 6 months in Ellinghausen-McCullough-Johnson-Harris medium to grow Leptospira. Antibodies against 24 serovars (Anhoa, Australis, Autumnalis, Ballum, Bataviae, Bratislava, Broomi, Canicola, Celledoni, Copenhageni, Coxi, Cynopteri, Djasiman, Grippotyphosa, Haemolytica, Icterohaemorrhagiae, Khorat, Paidja, Patoc, Pomona, Pyrogenes, Rachmati, Saxkoebing, Sejroe) belonging to 16 serogroups were determined using microscopic agglutination tests. Risk factors were analysed by Fisher's exact test. Urine samples of 2/260 cats (0.8%; 95% confidence interval (CI): 0.1%-2.8%) were PCR-positive, but none of the 260 urine samples were culture positive. Leptospira antibodies were detected in 14/260 cats (5.4%; 95% CI: 3.0%-8.6%) with titers ranging from 1:20 to 1:160 (serovars: Anhoa, Autumnalis, Celledoni, Copenhageni, Djasiman, Icterohaemorrhagiae, Patoc). Cats aged ≥4 years were significantly more often infected with Leptospira than younger cats. No other significant risk factors were found. In conclusion, outdoor cats in Thailand can shed DNA and, possibly, viable, pathogenic Leptospira in their urine, although at a much lower prevalence than expected when compared to countries with similar climate. Thus, cats can be a potential source of infection for people. Further studies are needed to determine the role of cats in transmitting this zoonotic disease in Thailand.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/30580489/