A recent outbreak in Manila belies the fact that reported rates of leptospirosis in the Philippines had actually decreased in recent years. See graph:
The following additional background data are abstracted from GIDEON www.GideonOnline.com (primary references available on request):
Leptospirosis was first reported n the Philippines in 1932.
– 65 cases were documented in literature published during 1932 to 1970; 390 during 1971 to 1973; approxomately 840 during 1998 to 2001.
– Leptospirosis is common in flood-prone areas of urban setting such as Metro Manila.
– The average age of patients is 32 years, 87% of cases were males and 70% are outdoor workers.
– The case fatality rate is 12 to 14 percent.
– Rates in Cabatuan, Iloilo are estimated at 147 cases per 100,000 population (2007 publication).
5% of aseptic meningitis cases in Manila (1989 publication)
43.6% of rice farmers in Central Luzon (1988 publication)
0% of dogs (RMAT, 1970 to 1973)
The following serovars of Leptospira interrogans have been demonstrated among patients in the Manila area: poi, tarassovi, manilai, pyrogenes, australis, grippotyphosa, javanica and automnalis.
1976 to 1983 – An outbreak of leptospirosis was reported on a penal farm in Sablayan, Mindoro.
1999 – An outbreak (17 cases) of leptospirosis involved participants in an ‘iron-man contest’ – from Germany, Hong Kong and the Philippines.
Update: Posted in ProMED