**flooding
**hurricanes, cyclones and typhoons
*direct evidence of transmission via seawater is not known so far
==epidemiology==
==clinical features==
*[https://pubmed.ncbi.nlm.nih.gov/6158073/ calf muscle tenderness]is one of pathognomonic symptoms but its pathophysiology is unkown
==diagnosis==
*blood culture positive only in the 1st week
*urine culture positive after 2 weeks
==treatment==
==chemoprophylaxis==
*doxycycline once a week during exposure to potentially contaminated water may be considered