Browsing by Author "Myers, Johnny"

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    The reproductive health effects of along term DDT exposure on malaria vector control workers in Northern Province, South Africa
    (2002) Dalvie, Mohamed Aqiel; Myers, Johnny
    Metabolites of DDT (1, 1, 1-trichloro-2,2-bis(p-chlorophenyl)ethane), used in many developing countries including South Africa for the control of malaria vectors, have been shown to be endocrine disruptors in vitro and in vivo. The study hypothesis was that male vector control workers highly exposed to DDT in the past should demonstrate clinically significant exposure-related anti-androgenic and/or estrogenic effects reflected in abnormalities in hormone levels, semen, sexual function and fertility. A cross-sectional study of 60 workers from 3 camps situated near Malaria Control Center (MMC) in Tzaneen was performed.
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    Risk factors for oesophageal cancer in Uruguay
    (2002) Sewram, Vikash; Boffetta, Paolo; Myers, Johnny
    The objective of this study was to evaluate maté consumption as a risk factor for oesophageal cancer and to further evaluate the role of quantity and temperature in order to assess whether the effect is related to the carcinogenicity of the plant or the high temperature at which maté is consumed. In addition the effect of diet, alcohol drinking and tobacco smoking on oesophageal cancer risk was assessed.