Barnett L. Cline

Ascariasis and trichuriasis in Cameroon

A national survey of Ascaris lumbricoides and Trichuris trichuria was carried out in Cameroon on more than 22,000 children from a random sample of 512 schools. Prevalence rates of both A. lumbricoides and T. trichuria infection were very low in the tropical zone (below 5%). They increased markedly in the equatorial zone, Guinea-type climate, to 60-85% for A. lumbricoides and 85-95% for T. trichuria. In the equatorial zone with Cameroon-type climate, prevalences were slightly lower: 50-70% for A. lumbricoides and 70-90% for T. trichuria infections. Environmental conditions are the main factors explaining these differences. Other factors (altitude, population density and urbanization) were not important. The entire population of villages selected from distinct climatic zones of Cameroon were also examined. The age group distribution of A. lumbricoides and T. trichuria infections indicated acquisition early in life, reaching a peak in early childhood, followed by a stable prevalence rate.

Schistosomiasis in Egypt

Professor Abdel-Wahabs book is comprehensive, authoritative, and exceedingly readable. While highlighting the contributions of Egyptian investigators, the authors impressive awareness of the international scientific literature on schistosomiasis shows he is free of xenophobic tendencies. Indeed, the books 544 references are remarkably well balanced, current, and conveniently presented and represent one of the most useful features of the book. The author writes in a clear and concise style. The contents are organized such that after a delightful historical review (Chapter I), the remainder of the book is essentially a textbook on schistosomiasis using Egypt as a “case study.” The subject is treated in a comprehensive and even-handed manner, with clinical and pathologic features of the disease receiving somewhat more emphasis than other topics. Most statements are appropriately supported by references, but occasional ones seem to fall into the category of often repeated but unsubstantiated claims.