Exposure and Carriage of Pathogenic Leptospira in Livestock in St. Croix, U.S. Virgin Islands

Author:

Cranford Hannah M.ORCID,Taylor MarissaORCID,Browne Andrew SpringerORCID,Alt David P.,Anderson Tammy,Hamond Camila,Hornsby Richard L.,LeCount Karen,Schlater Linda,Stuber Tod,De Wilde Leah,Burke-France Valicia J.,Ellis Esther M.ORCID,Nally Jarlath E.ORCID,Bradford Bethany

Abstract

From 2019–2020, the Virgin Islands Department of Health (VIDOH) investigated potential animal reservoirs of Leptospira spp., the pathogenic bacteria that cause leptospirosis. We examined Leptospira exposure and carriage in livestock on the island of St. Croix, United States Virgin Islands (USVI). We utilized the microscopic agglutination test (MAT) to evaluate the sera, and the fluorescent antibody test (FAT), real time polymerase chain reaction (rt-PCR), and bacterial culture to evaluate urine specimens from livestock (n = 126): 28 cattle, 19 goats, 46 pigs, and 33 sheep. Seropositivity was 37.6% (47/125) with agglutinating antibodies to the following serogroups identified: Australis, Djasiman, Icterohaemorrhagiae, Ballum, Sejroe, Cynopteri, Autumnalis, Hebdomadis, Pomona, Canicola, Grippotyphosa, and Pyrogenes. Urine from 4 animals (4.0%, 4/101) was positive by rt-PCR for lipL32: 2 sheep, 1 goat, and 1 bull. Sequencing of secY amplicons identified L. interrogans in 1 sheep and 1 bull. Livestock in USVI harbor pathogenic Leptospira bacteria and could play a role in the zoonotic cycle of leptospirosis.

Funder

Centers for Disease Control and Prevention

Council of State and Territorial Epidemiologists

Publisher

MDPI AG

Subject

Infectious Diseases,Public Health, Environmental and Occupational Health,General Immunology and Microbiology

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