Global prevalence and epidemiology of leptospirosis in domestic cats, a systematic review and meta-analysis
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Abstract
Research worldwide describes different prevalences of leptospirosis in domestic cats. The aims of this study were: to perform a systematic review to determine epidemiologic characteristics of published observational studies on leptospirosis, and to obtain pooled measures of the global prevalence of the disease with a meta-analysis for studies using indirect diagnostic tests (M1) and direct diagnostic tests (M2). A bibliographic search to find observational epidemiological studies reporting the prevalence of leptospirosis in cats was performed. The geographic location and decade of publication of the studies, serovars, serogroups and factors associated with Leptospira infection were summarized through a systematic review. Meta-analyses were achieved to obtain the pooled global prevalence (M1 and M2), prevalences according to the continent and origin of the sampled cats. 139 articles were found, and 93 were selected. In 16 articles, Leptospira serogroups were recorded and seropositivity was more frequent for Icterohaemorragiae, Australis, Autumnalis, Pomona. In 59 articles, the serovars were reported, being the most common reactions for Pomona, Grippotyphosa and Canicola. The M1 included 83 articles; the pooled prevalence was 11.09 % (95 % CI = 8.68–13.73). The M2 comprised 23 studies and the pooled prevalence was 9.22 % (95 % CI = 4.30–15.41). A subgroup analysis revealed higher pooled prevalences in Oceania and Europe, shelter, rural and outdoor cats in studies using indirect diagnostic tests and in Asia, stray cats and veterinary hospital patients in studies with direct tests.
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