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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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The Leptospira interrogans complex -
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The correct answer is  Ans. is 'b' i.e., Mostly affects the kidney and liver . The leptospires are generally non pathogenic in reservoir animals (e.g. rodents). . The leptospires mainly infect the kidney and liver. . Vasculitis is responsible for the most impoant manifestations of the disease. . Ig M antibodies appear after one week (not disappear). . No vaccine of leptospira is used world wide. "In pas of the world where the prevalence of human infection in ceain group is high, selective human immunization schemes may be of benifit if suitable vaccine is available"