Abstract
Albendazole reduces diarrhoea in African AIDS patients, but it is unclear if the clinical response to treatment reflects pathogen eradication and/or mucosal recovery. Adults with HIV-related persistent diarrhoea were treated with albendazole 800 mg twice daily for 14 days. Clearance of parasites was evaluated at 3 and 6 weeks by stool microscopy. At baseline and at 6 weeks duodenal biopsies were taken for electron microscopy (EM) and morphometry. Ten (7%) of 153 patients had cryptosporidiosis, 54 (37%) had isosporiasis and 23 (16%) had microsporidiosis. By 3 weeks, these protozoa were cleared in 27 (46%) of 59 patients initially positive. By 6 weeks, 34 (39%) of 87 patients experienced complete clinical response, 18 (21%) partial response and 35 (40%) no response. Crypt depth increased by 15% over 6 weeks (P < 0.001), but villous height increased only in patients with complete response (median + 50 microm, interquartile range (IQR) 2-90, compared to patients with partial (+ 4 microm, IQR -15,41) or no response (-13 microm, IQR -2,12; P=0.008)). Fifteen patients died: body mass index < 17.5 kg/m(2) and crypt depth < 180 microm independently predicted death. Albendazole therapy reduced the burden of protozoal infection and promoted mucosal recovery in patients with a complete clinical response.
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