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South East London Health Protection Unit, 1 Lower Marsh, London SE1 7NT. vivien.cleary@swlondon.nhs.uk
Malaria in south east London is under-notified, and a previous local study has described how available data can underestimate the incidence. An active surveillance system was established and data on malaria cases diagnosed between the 1st January and 31st December 2000 were gathered from local laboratories, the Malaria Reference Laboratory (MRL) and a neighbouring health authority. In total 320 cases were identified in local residents (42.33 per 100,000). Of these 320, 293 were laboratory confirmed (38.75 per 100,000) and there were 47 notifications on clinical suspicion. Only 6.8% (20) laboratory-confirmed cases were formally notified. Males of African descent aged 25-39 years who travelled to West Africa were most affected, and 92.5% of the cases were of P. falciparum infection. The surveillance programme confirmed that formal malaria notifications are unreliable. The most important group of residents for targeted health intervention are members of ethnic minority groups, born in endemic areas and travelling to their countries of origin to visit family or friends.
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