| a mark-recapture experiment with the filariasis vector anopheles punctulatus in papua new guinea. | a capture-recapture experiment with the filariasis vector anopheles punctulatus from papua new guinea (png) is described. eight hundred and ninety-seven engorged females collected indoor resting or in landing catches were released, and 82 were subsequently recaptured. infection rates were higher in recaptured mosquitoes than in unmarked ones. recapture rates declined exponentially with distance from the release site, but an infected female was recaptured 1.8 km from the release site. the estimat ... | 1987 | 3328568 |
| vectors of wuchereria bancrofti in the sepik provinces of papua new guinea. | the vectors of wuchereria bancrofti were investigated in two areas of the sepik provinces of papua new guinea. at the village of yauatong, indoor-resting anopheles punctulatus had an infection rate of 47.3% and an infective rate of 3.4%. no infections occurred in 382 culex annulirostris obtained in night-landing catches. at the village of yankok only an. koliensis contained infective larvae but an. punctulatus and cx quinquefasciatus were infected. probit values of the cumulative percentages of ... | 1986 | 3523861 |
| microscopic visualization of wuchereria and brugia larval stages in intact cleared mosquitoes. | over the past several decades, epidemiologic data from filarial vectors typically has been obtained by mass dissection or by dissection of individual specimens. the former is quick and easy to do on large numbers of insects but provides no information on the frequency distribution of infection, presence of early developmental stages, or larval location; the latter is labor-intensive and tedious. we describe a new technique that can provide data comparable to those obtained by individual dissecti ... | 1994 | 7943576 |
| randomised community-based trial of annual single-dose diethylcarbamazine with or without ivermectin against wuchereria bancrofti infection in human beings and mosquitoes. | who has targeted lymphatic filariasis for elimination. studies of vector-parasite relations of wuchereria bancrofti suggest that a reduction in the microfilarial reservoir by mass chemotherapy may interrupt transmission and thereby eliminate infection. however, no field data exist on the impact of chemotherapy alone on vector efficiency and transmission intensity of w bancrofti. we compared the impact of an annual community-wide single-dose treatment with diethylcarbamazine alone or with ivermec ... | 1998 | 9449870 |
| a qpcr-based multiplex assay for the detection of wuchereria bancrofti, plasmodium falciparum and plasmodium vivax dna. | the purpose of this study was to develop real-time multiplex quantitative pcr (qpcr) assays for the simultaneous detection of wuchereria bancrofti (wb), plasmodium falciparum (pf) and p. vivax (pv) in mosquitoes. we optimized the assays with purified dna samples and then used these assays to test dna samples isolated from anopheles punctulatus mosquitoes collected in villages in papua new guinea where these infections are co-endemic. singleplex assays detected wb, pf and pv dna in 32%, 19% and 1 ... | 2009 | 18801545 |
| filarial worms reduce plasmodium infectivity in mosquitoes. | co-occurrence of malaria and filarial worm parasites has been reported, but little is known about the interaction between filarial worm and malaria parasites with the same anopheles vector. herein, we present data evaluating the interaction between wuchereria bancrofti and anopheles punctulatus in papua new guinea (png). our field studies in png demonstrated that an. punctulatus utilizes the melanization immune response as a natural mechanism of filarial worm resistance against invading w. bancr ... | 2011 | 21347449 |
| lymphatic filariasis in papua new guinea: prospects for elimination. | lymphatic filariasis is a significant public health problem in several pacific island countries. papua new guinea is one of the most populous countries in this region, and 39% of its residents are estimated to be infected with wuchereria bancrofti. the ministries of health of the 22 islands and territories in the pacific region are committed to taking action against lymphatic filariasis. accordingly, a regional collaborative effort aimed at the control of filariasis has been organized under the ... | 2003 | 12592558 |
| impact of untreated bednets on prevalence of wuchereria bancrofti transmitted by anopheles farauti in papua new guinea. | despite the growing evidence that insecticide-treated mosquito nets reduce malaria morbidity and mortality in a variety of epidemiological conditions, their value against lymphatic filariasis infection and disease is yet to be established. the impact of untreated bednets on the prevalence of wuchereria bancrofti (cobbold) (nematoda: filarioidea) infection and disease was investigated on bagabag island in papua new guinea, where both malaria and filariasis are transmitted by the same vector mosqu ... | 2002 | 11963977 |
| application of a polymerase chain reaction-elisa to detect wuchereria bancrofti in pools of wild-caught anopheles punctulatus in a filariasis control area in papua new guinea. | chemotherapy-based eradication programs are aimed at stopping transmission of wuchereria bancrofti by its obligatory mosquito vector. this study compares one year post-treatment w. bancrofti infection rates of anopheles punctulatus, the main vector of lymphatic filariasis in papua new guinea, using traditional dissection techniques and a polymerase chain reaction (pcr)-based elisa of a parasite-specific ssp i repeat. a total of 633 mosquitoes in 35 batches were dissected. six batches contained w ... | 2000 | 11037778 |
| transmission intensity and its relationship to infection and disease due to wuchereria bancrofti in papua new guinea. | this study describes the relationship between transmission intensity and infection and disease due to wuchereria bancrofti in an endemic area of papua new guinea. the prevalence of microfilaremia in the entire study population was 66%. of 1892 persons examined, 6.2% and 12.3% had lymphedema of the legs and hydroceles, respectively. the prevalences of microfilaremia and clinical morbidity were lowest in persons <20 years old and increased progressively with age. annual transmission potential and ... | 1997 | 9207373 |
| transmission dynamics of wuchereria bancrofti in east sepik province, papua new guinea. | bancroftian filariasis is endemic in many areas of papua new guinea. this study describes the entomologic indices of transmission near dreikikir in east sepik province, papua new guinea. a total of 1,735 culicine mosquitoes, including culex and mansonia species, were dissected, but none were infected with filarial larvae. in contrast, anopheles punctulatus and an. koliensis were found to be potential vectors: 7.3% of anopheles were infected and the mean number of first- to third-stage larvae per ... | 1996 | 8686774 |
| filarial vector studies in a diethylcarbamazine-treated and in untreated villages in papua new guinea. | entomological studies were undertaken in three villages in the east sepik province of papua new guinea. the inhabitants of one village, nanaha, had been treated with diethylcarbamazine (dec) to reduce the prevalence and density of microfilaraemia of wuchereria bancrofti. no intervention was undertaken in the other two villages, yauatong and musenau, in which bancroftian filariasis was present but with markedly different human prevalence rates and mean parasite densities. in yauatong, infection r ... | 1995 | 8544229 |
| the prevalence of naturally acquired multiple infections of wuchereria bancrofti and human malarias in anophelines. | malaria and filaria infection rates were determined for anopheline mosquitoes collected whilst biting and resting in village houses in papua new guinea. the number of anophelines infected with both parasites was greater than expected from the infection rates of each parasite and this difference was significant in resting collections. the excess of multiply infected mosquitoes is probably a result of a vector population composed of individuals with differing numbers of opportunities to become inf ... | 1990 | 2194153 |
| towards eliminating lymphatic filariasis in papua new guinea: impact of annual single-dose mass treatment on transmission of wuchereria bancrofti in east sepik province. | the impact of annual single-dose community-wide treatment on the transmission of wuchereria bancrofti was investigated in 5 villages in the east sepik province where pretreatment prevalence of microfilaraemia ranged from 34% to 73%. anopheles punctulatus and an. koliensis were the only carriers of the parasite. 3 villages received diethylcarbamazine citrate (dec) in combination with ivermectin (ivr) and 2 received dec alone. the rate and intensity of microfilaraemia were both reduced in all 5 vi ... | 2000 | 11939298 |