Leptospirosis Disease Burden in Kerala

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Key takeaways

Leptospirosis is a bacterial zoonotic disease caused by Leptospira species, causing high disease burden in Kerala during rainy seasons.
Bacteria persist in animal kidneys and spread through water or soil contaminated with urine, entering human bodies via cuts or mucous membranes.
Symptoms typically appear within 5 to 14 days of exposure, progressing from flu-like fever to severe complications like Weil's syndrome.
Treatment requires medical antibiotics like doxycycline or penicillin G, as animal vaccines cannot completely eliminate renal carriage.
The infection is widespread across South-East Asia, with major case counts reported in India, Indonesia, Thailand, and Sri Lanka.

Kerala is currently facing a high burden of illness and mortality from leptospirosis, especially during its monsoon and post-monsoon seasons.

Leptospirosis is a zoonotic infection caused by spiral-shaped pathogenic bacteria from the genus Leptospira.
Many wild and domestic mammals like rodents, cattle, pigs, and dogs host these bacteria in their kidney tubules.
Carrier animals often show no symptoms but release bacteria through urine, making rodents the main cause of soil and water contamination.
Humans catch the disease by touching contaminated water, soil, or food through skin cuts, while human-to-human transmission stays rare.
Symptoms show up 5 to 14 days after exposure, starting with mild fever and sometimes advancing to severe Weil's syndrome or jaundice.
Doctors frequently underdiagnose the condition because its initial signs closely resemble other common viral fevers.
Healthcare providers treat patients using targeted antibiotics, including doxycycline, penicillin G, or ceftriaxone, based on disease severity.
Preventive steps involve pest control, sanitation, and protective gear, although animal vaccines do not fully block kidney bacterial carriage.
The disease impacts populations globally, with heavy incidence across South-East Asian nations including India, Indonesia, Thailand, and Sri Lanka.