Browsing by Author "Guyatt, H.L."

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Morbidity and mortality due to Ascaris-induced intestinal obstruction
(Oxford University Press, 1997) de Silva, N.R.; Guyatt, H.L.; Bundy, D.A.P.
We examined epidemiological aspects of Ascaris-induced intestinal obstruction (AI-IO) through analysis of published reports on the subject. In 9 studies of > or = 100 patients admitted to hospital due to ascariasis, intestinal obstruction was the single most common complication and accounted for 38-87.5% of all complications (weighted mean 72%). The proportion of intestinal obstruction caused by ascariasis was identified in 14 studies from 7 countries with varying degrees of endemic ascariasis. Using relevant data on the duration of the study, the number of beds in the reporting hospital, and the number of hospital beds/1000 population in the area, the number of cases of AI-IO/year/1000 population was estimated from 11 studies. Both the proportion of AI-IO (range 0-0.71) and the number of cases of AI-IO/year/1000 population (range 0-0.25) were significantly related, in a non-linear manner, to the local prevalence of ascariasis (range 0.01-0.92). In 12 studies of > or = 30 patients with AI-IO, the case fatality rates ranged from 0 to 8.6% (weighted mean 5.7%). The mean age of patients with AI-IO was < or = 5 years in 6 of 7 studies in which age was specified.
The Treatment and control of helminth infections prevalent in Sri Lanka
(The Kandy Society of Medicine, 1997) de Silva, N.R.; Guyatt, H.L.
Worm burden in intestinal obstruction caused by Ascaris lumbricoides
(Blackwell Scientific Publications, 1997) de Silva, N.R.; Guyatt, H.L.; Bundy, D.A.P.
Examination of 24 case reports suggests the worm burden in those presenting to hospital with intestinal obstruction is > 60 and is about tenfold higher in fatal cases.