Browsing by Author "Rivera, D"
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Item Breeding point and larval association of anopheline mosquitoes of northwest Mindoro, Philippines.(1985-03-01) Wooster, M T; Rivera, DA larval survey of stream breeding Anopheles was conducted in the foothills of northwest Mindoro Island, Philippines. Eleven species were collected with An. ludlowae constituting 27.9% of the total. The three malaria vectors in the area, An. flavirostris, An. maculatus and An. mangyanus, made up 25.2, 5.1 and 3.8% of the collection, respectively. Breeding point induces were used to identify optimum habitat and larval association analyses. An. annularis and An. ludlowae had high positive association index with An. flavirostris, while An. mangyanus and An. filipinae appeared to have poor association within the breeding point.Item Chloroquine and quinine resistant Plasmodium falciparum on the island of Mindoro, Philippines, 1982.(1982-12-01) Smrkovski, L L; Buck, R L; Rodriguez, C S; Wooster, M T; Mayuga, J L; Rivera, DA field study was conducted on the island of Mindoro, Republic of the Philippines in which over 800 persons were screened for malaria and approximately 8% were found positive. The in vitro microtechnique was used to test for sensitivity to chloroquine, amodiaquine, mefloquine and quinine in 20 slide-confirmed P. falciparum cases. Sixteen of these cases were also followed for in vivo chloroquine sensitivity. Four cases showed in vitro resistance to chloroquine; 2 also showed resistance to quinine. All showed in vitro sensitivity to mefloquine and amodiaquine. The results of in vivo test were consistent with either a sensitive (S) or R-1, resistant response to chloroquine. Taken together, the in vitro and in vivo chloroquine tests indicate 4 cases of chloroquine resistance at the R1 level.