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Lancet Infectious Diseases. 2003 Feb; 3(2):65.A 30-year campaign has successfully ended the blight of river blindness in west Africa. This monumental achievement is the result of the Onchocerciasis Control Programme (OCP), established in 1974 under the joint auspices of the United Nations Development Programme, World Bank, WHO, and the UN Food and Agriculture Organization. (author's)
Transmission intensity index to monitor filariasis infection pressure in vectors for the evaluation of filariasis elimination programmes.
Tropical Medicine and International Health. 2003 Sep; 8(9):812-819.We conducted longitudinal studies on filariasis control in Villupuram district of Tamil Nadu, south India, between 1995 and 2000. Overall, 23 entomological (yearly) data sets were available from seven villages, on indoor resting collections [per man hour (PMH) density and transmission intensity index (TII)] and landing collections on human volunteers [PMH and annual transmission potential (ATP)]. All four indices decreased or increased hand-in-hand with interventions or withdrawal of inputs and remained at high levels without interventions under varied circumstances of experimental design. The correlation coefficients between parameters [PMH: resting vs. landing (r = 0.77); and TII vs. ATP (r = 0.81)] were highly significant (P < 0.001). The former indices from resting collections stand a chance of replacing the latter from landing collections in the evaluation of global filariasis elimination efforts. The TII would appear to serve the purpose of a parameter that can measure infection pressure per unit time in the immediate household surroundings of human beings and can reflect the success or otherwise of control/elimination efforts along with human infection parameters. Moreover, it will not pose any additional risk of new infection(s) and avoids infringement of human rights concerns by the experimental procedures of investigators, unlike ATP that poses such a risk to volunteers. (author's)