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During the long Sahelian dry season, mosquito vectors of malaria are expected to perish when no larval sites are available; yet, days after the first rains, mosquitoes reappear in large numbers. How these vectors persist over the 3-6-month long dry season has not been resolved, despite extensive research for over a century. Hypotheses for vector persistence(More)
Genetic heterogeneity in the African malaria mosquito, Anopheles gambiae, led to the recognition of chromosomal forms over 30 years ago by Prof Coluzzi and colleagues, who proposed that divergence between these populations was extensive and related to adaptation to mesic vs arid habitats as well as to particular types of larval habitats. Redefined as "(More)
Infratentorial subdural empyemas are rare. It is an important neurological infection requiring immediate neurosurgical treatment. The nonsur-gical treatment of subdural empyema has been reported sporadically. In this paper the authors report the nonsurgical treatment of a case of in-fratentorial subdural empyema. The patient with left recurrent otitis was(More)
Awareness is growing throughout the world of the grave environmental damage that has been caused by human activities ad of the disastrous consequences such damage may pose for human survival. The 1992 "Earth Summit" in Rio de Janeiro marked the culmination of a series of preliminary ministerial conferences in Africa and elsewhere that called attention to(More)
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