| biting periodicity index of culex quinquefasciatus & its relationship with microfilaria periodicity in pondicherry. | the biting periodicity index of the bancroftian filariasis vector, c. quinquefasciatus, was calculated on the basis of a large longitudinal data base and compared with the periodicity index of microfilariae of wuchereria bancrofti. the biting periodicity index of the vector population was 29.78 and found to be close to the periodicity index of the microfilariae. the peak biting activity of the vector and peak appearance of microfilariae in the peripheral blood occurred at about 01.00 h, which ac ... | 1991 | 1797648 |
| control of bancroftian filariasis by diethylcarbamazine medicated common salt in karaikal, pondicherry, india. | a trial of diethylcarbamazine (dec) mixed in crystal common salt at a concentration of 0.15 to 0.2 per cent was carried out for 46 months (1982 to 1986) in karaikal town and five commune panchayats of pondicherry for control of bancroftian filariasis. comparison of pre and post trial surveys showed 97.6 per cent reduction of microfilaria rate. no microfilaria or disease case was found in less than 5 years age group in the post trial survey. there was about 72 per cent reduction of disease rate. ... | 1989 | 2693530 |
| efficacy of pirimiphos-methyl (50% ec), as a larvicide for the control of culex quinquefasciatus. | pirimiphos-methyl, an organophosphorus insecticide is known to overcome resistance mechanisms of mosquitoes to other organophosphates. information on the duration of efficacy of pirimiphos-methyl (50% emulsifiable concentrate) for the control of immatures of culex quinquefasciatus, the vector of bancroftian filariasis, is scanty and hence site specific field trials are necessary to determine the field dosage. pirimiphos-methyl (50% ec) was tested for its efficacy in cesspits and drains against t ... | 2009 | 20090104 |
| non-involvement of nulliparous females in the transmission of bancroftian filariasis. | the possible involvement of nulliparous females of culex quinquefasciatus in the transmission of bancroftian filariasis under field conditions was examined in pondicherry, south india. biting nulliparous females that had previously ingested partial blood meals were found infected with microfilariae/l1 stage larvae. none of them harboured infective-stage larvae. these findings suggest that nulliparous females are not involved in the transmission of filariasis. therefore, their inclusion for estim ... | 1992 | 1363179 |
| seasonality of adult culex quinquefasciatus and transmission of bancroftian filariasis in pondicherry, south india. | seasonal variations in biting culex quinquefasciatus and transmission of bancroftian filariasis were investigated in pondicherry, south india. the biting density of c. quinquefasciatus, the principal vector species, was lowest in the summer months and higher during the monsoon and winter months. the survival of the vectors as indicated by the proportion of parous mosquitoes was found to be less in the summer season. biting mosquitoes with infective stage larvae were not encountered during the ho ... | 1992 | 1356298 |
| characterization & larvicidal activity of indigenous isolates of bacillus sphaericus from natural breeding habitats. | soil, water and moribund/or dead mosquito larval samples collected from various mosquito breeding habitats of pondicherry and tamil nadu were screened for the presence of mosquito pathogenic b. sphaericus isolates. from 1892 samples 21 isolates were obtained. all these isolates fell under 3 serogroups viz., h5a5b, h6 and h45, the latter two serotypes not reported hitherto as toxic to mosquito larvae and three phage-groups namely, phage group 2, phage group 3 and an unknown one. twelve of the iso ... | 1990 | 1975802 |
| bancroftian filariasis in pondicherry, south india--epidemiological impact of recovery of the vector population. | an integrated vector management (ivm) strategy was implemented from 1981 to 1985 in one part of pondicherry, south india, for the control of the bancroftian filariasis vector culex quinquefasciatus (the ivm area). the rest of the town (the comparison area) received the conventional larvicidal input. after 1985 both the areas were managed conventionally. the switch to conventional strategy resulted in an increase of vector density in both areas. the microfilaraemia prevalence in humans showed a g ... | 1992 | 1601082 |
| observations on population density of culex quinquefasciatus and transmission indices of bancroftian filariasis during and after integrated vector management strategy. | an integrated vector management strategy, implemented as an alternative to the conventional control operations that include mainly chemical control in pondicherry, south india, reduced very substantially the population density of culex quinquefasciatus. this resulted in drastic decrease in the intensity of transmission of bancroftian filariasis transmitted by culex quinquefasciatus and consequently the incidence of new infections in children of 0-5 age group was minimized. when the ivm strategy ... | 1992 | 1344948 |
| field evaluation of an insect growth regulator, pyriproxyfen 0.5% gr against culex quinquefasciatus, the vector of bancroftian filariasis in pondicherry, india. | pyriproxyfen, 0.5% granular formulation (gr), an insect growth regulator (igr) was tested against culex quinquefasciatus larvae and pupae in disused wells, cesspits and drains at the dosages of 0.1, 0.25, and 0.5kg(ai)/ha to determine the most appropriate field dosage. the igr was found to be effective against c. quinquefasciatus larvae and pupae in all the larval habitats tested. in drains with slow moving water, application of pyriproxyfen 0.5% gr at 0.5kg(ai)/ha resulted in >80% emergence inh ... | 2008 | 18502394 |
| risk of infection of wuchereria bancrofti to humans by culex quinquefasciatus in pondicherry and its relationship with microfilaria prevalence. | the risk of infection (ri) with wuchereria bancrofti by vector mosquitoes has been conventionally estimated from the biting population of all age classes. this estimate of ri had no correlation with microfilaria (mf) prevalence and intensity of infection in humans. a new method for estimating ri from a resting population of culex quinquefasciatus is proposed based on a longitudinal study in seventeen sites in pondicherry, india. unlike previous estimates, ri calculated by the present method cons ... | 1993 | 8147280 |