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Leptospirosis in South Africa

Adrienne Saif, John Frean, Jenny Rossouw, Anastasia N. Trataris
Onderstepoort Journal of Veterinary Research | Vol 79, No 2 | a478 | DOI: https://doi.org/10.4102/ojvr.v79i2.478 | © 2012 Adrienne Saif, John Frean, Jenny Rossouw, Anastasia N. Trataris | This work is licensed under CC Attribution 4.0
Submitted: 13 June 2012 | Published: 20 June 2012

About the author(s)

Adrienne Saif, University of the Witwatersrand, South Africa
John Frean, University of the Witwatersrand, South Africa
Jenny Rossouw, Special Bacterial Pathogens Reference Unit, National Institute for Communicable Diseases, National Health Laboratory Services, South Africa, South Africa
Anastasia N. Trataris, University of the Witwatersrand, South Africa

Abstract

Leptospirosis is a common zoonosis worldwide. It has a ubiquitous distribution and causes a wide spectrum of disease. Leptospirosis therefore has a broad reservoir host range, and many infected species of animals excrete leptospires in their urine, which leads to contamination of soil and water. Typical descriptions of the disease include a biphasic (anicteric form) and fulminant disease in the icterohaemorrhagic form. Only a few local case reports of human leptospirosis have been published, the most recent one being in 1974.

A rodent-related zoonosis study (RatZooMan) was conducted from 2003 until 2006 in three provinces (Limpopo, KwaZulu-Natal and the Eastern Cape). Of the people sampled in Cato Crest (Durban, KwaZulu-Natal Province), 43/217 (19.8%) were seropositive for leptospirosis. Of the clinical samples sent to the Special Bacterial Pathogens Reference Unit from all over the country for testing in 2009, 16/176 (9%) were IgM positive; in 2010 and January 2011 to May 2011, 14/215 (6.5%) and 12/96 (12.5%), respectively, were IgM positive.

The apparent incidence of leptospirosis in the South African population is moderately high based on the detected positives in suspected cases; it is thought that the circulating infection rate may be even higher when looking at the RatZooMan results. This may be due to underreporting and undiagnosed cases. Communities in informal settlements in urban areas are especially at risk as infected rodent populations are a continuous source of transmission.


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