A computer-based book on medical helminthology.

A computer assisted book on medical helminthology has been prepared using ZOOM, a teaching computer program, which uses hypermedia technology to link pictures and text. Information on various helminths, including their morphology, life cycle, clinical manifestations, diagnosis, treatment and epidemiology can be easily accessed using three types of link in a non-linear approach. The book consists of five chapters, each contains the latest information on various aspects of helminth parasites.

The use of primary health care system in the control of schistosomiasis in the Riyadh Region of Saudi Arabia.

The use of well developed and adequately distributed Primary Health Care (PHC) centers for the control of schistosomiasis in the infested areas in the Central Province of Saudi Arabia around the capital city of Riyadh has proven feasible producing satisfactory results. The number of inhabitants examined for schistosomiasis increased from 10688 in 1984 to 106579 in 1988, and the prevalence dropped from 9.3% in 1984 to 0.

The potential role of various species of intermediate hosts of Schistosoma haematobium in Saudi Arabia.

The potential role of 3 species of Bulinus in the transmission of Schistosoma haematobium in Saudi Arabia was assessed on the basis of their susceptibility to experimental infection, their geographical distribution and numbers, and the type of habitats in which they were found. B. truncatus, distributed mainly in the mid- and south-western regions, showed extremely low susceptibility to strains of S.

Progress achieved in the control of schistosomiasis in Saudi Arabia.

A significant reduction in the prevalence of both intestinal and urinary schistosomiasis has occurred in all emirates (districts) in all 12 foci of the infection distributed in five regions of Saudi Arabia. Infection with Schistosoma mansoni has dropped in foci of the infection in the Central Region (Riyadh and Hail) and in all foci within the western provinces. Reduction has also occurred in the prevalence of S.

Selective primary health care: strategies for control of disease in the developing world. XII. Ascariasis and trichuriasis.

Ascariasis and trichuriasis are the most prevalent and widespread intestinal helminthiases. Transmission of disease occurs by ingestion or inhalation of Ascaris and Trichuris eggs embryonated in the soil. During the migration of Ascaris to the lungs, pneumonic symptoms may develop.