| larval ecology and mosquito fauna of upper brahmaputra valley, northeast india. | ninety-one mosquito species in 15 genera were collected from 22 habitat types of upper brahmaputra valley in assam and bordering areas of arunachal pradesh. nineteen species have been recorded for the first time in assam including seven first records from the northeast region and three first country records. jaccard's coefficient was used to quantify the similarity between 13 different geographical localities surveyed on the basis of their mosquito fauna. group average sorting (upgma) cluster an ... | 1998 | 10497839 |
| incrimination of anopheles dirus as a vector of malaria in dibrugarh district, assam. | anopheles nigerrimus, a. vagus, a. dirus, a. karwari and a. kochi were the most abundant species among 12 anopheline species collected during the course of entomological studies carried out from july to september, 1988 in an area endemic for malaria under tengakhat phc of dibrugarh district, assam. sporozoites were detected in the salivary glands of one specimen of a. dirus, peyton & harrison (a. balabacensis) which constituted about 18.11 per cent of the total anopheline collection. | 1989 | 2699591 |
| epidemiological observations on malaria in some parts of tengakhat phc, dibrugarh district, assam. | a three year study carried out in 44 villages (pop. 17,938) reveals seasonal transmission of malaria i.e., from june to november. the incidence of malaria was high in the year 1988 in comparison to that of 1987 and 1989. p. falciparum was the predominant species. the population living in forest fringe areas were more prone to malaria than the rest. anopheles nigerrimus, an. kochi, an. karwari and an. philippinensis were most abundant among the 16 anopheline species collected. known vectors of ma ... | 1991 | 1810748 |
| vector incrimination in tamulpur primary health centre, district nalbari, lower assam during malaria outbreak 1995. | a widespread outbreak of malaria occurred in different districts of lower assam in april, 1995. entomological investigations were carried out in primary health centre tamulpur, the worst hit area of nalbari district. of the nine anopheline species collected, anopheles minimus was incriminated as the malaria vector with sporozoite rate of 6.5 per cent. the slow moving streamlets were identified as the sole breeding places of an. minimus. | 1996 | 9062040 |
| evaluation of methoprene (altosid) and diflubenzuron (dimilin) for control of mosquito breeding in tezpur (assam). | insect growth regulators (igrs) namely, isopropyl (e-e)-(rs)-11-methoxy-3,7,11-trimethyldodeca-2, 4-dinoate (methoprene) and 1-(4-cyclophenyl)-3-(2,6-diflerobenzoyl) urea (diflubenzuron) were evaluated against mosquito larvae in laboratory as well as in different breeding habitats in tezpur, assam. lc90 values of diflubenzuron against culex quinquefasciatus and aedes albopictus were 0.0022 and 0.0027 ppm respectively, while it was 0.0027 and 0.0022 ppm respectively in case of methoprene. however ... | 1996 | 8952169 |
| current insecticide susceptibility status of anopheles minimus theobald in assam. | | 1996 | 8810151 |
| endoparasitic hymenostome ciliate a potential biocontrol agent, naturally infecting anopheline larvae in assam--a preliminary report. | | 1996 | 8810150 |
| malaria survey in tarajulie tea estate and adjoining hamlets in sonitpur district, assam. | malaria survey in tarajulie tea estate (te) and its adjoining hamlets revealed that pf was the predominant parasite species (79%) and morbidity was alarming. malaria positive cases were recorded in all age groups including infants. however, morbidity was much pronounced in the hamlets than among garden dwellers. mostly anopheles minimus were recorded in the day resting collections from human dwellings (indoor) and in overnight man biting catches in the hamlets. from these collections. an. minimu ... | 1996 | 8690129 |
| present perspectives of malaria transmission in boko area of assam. | a longitudinal study on malaria transmission was conducted from january 1984 to december 1988 in three villages in boko phc of assam, where indoor residual ddt spray was withdrawn during the period of study. anopheline fauna comprising of 19 species was identified and their seasonal density estimated. anopheles philippinensis was the predominant species followed by an. minimus. the principal role of an. minimus in the transmission of malaria and predilection for indoor resting in this area was c ... | 1993 | 8014435 |
| some observations on malaria in boko phc of kamrup district, assam. | | 1994 | 7963383 |
| estimation of vectorial capacity of anopheles dirus (diptera: culicidae) in a forest-fringed village of assam (india). | to estimate the vectorial capacity of anopheles dirus, the main vector of forest malaria in the northeastern region of india, in order to gain an understanding of entomological factors related to malaria transmission in forest-fringe areas of assam, india, an isolated village in the tropical rain forest-fringed area in the district of dibrugarh, assam, under the influence of an. dirus alone was studied. data on various entomological variables required for computation of the vectorial capacity we ... | 2001 | 12653151 |
| a preliminary field study on repellency of neem oil against anopheles dirus (diptera:culicidae) in assam. | | 2000 | 11198400 |
| epidemiology of malaria outbreak (april/may, 1999) in titabor primary health centre, district jorhat (assam). | an investigation was undertaken of a malaria outbreak in the primary health centre titabor, district jorhat, assam during may/june 1999. the fever rate in the community since march 1999, was 44.4 per cent with an average case load of 2.5 per family. the fever cases peaked in the third week of may. slide positive and slide falciparum rates in mass blood survey, in the study village were 16.1 and 14.5 per cent respectively with 90 per cent infection of plasmodium falciparum. males (spr 17.5%) suff ... | 2000 | 10935318 |
| cytotaxonomic evidence for the presence of anopheles nivipes in india. | anopheles philippinensis mosquitoes were collected from 5 states in india: assam, meghalaya, arunachal pradesh, manipur, and nagaland. half-gravid females were examined for variations in wing venation using the presector dark mark on vein i and polytene chromosomes derived from ovarian nurse cells. polytene chromosomes were examined for diagnostic inversions, t on chromosome arm 2 and i on arm 5. based on wing characteristics, both an. philippinensis and an. nivipes were identified. polytene chr ... | 2000 | 10901629 |
| insecticide susceptibility of anopheles dirus in assam. | | 1998 | 10810572 |
| a report of mosquito fauna survey and vector incrimination in goalpara district of assam. | | 1997 | 9699424 |
| evaluation of permanet 2.0 mosquito bednets against mosquitoes, including anopheles minimus s.l., in india. | wash resistance and field bioefficacy of permanet 2.0 nets, long lasting insecticidal nets, against mosquitoes were evaluated in assam, northeastern india. after repeated hand washings at 12-day intervals a decline in the mosquito killing ability of permanet nets was noted (trend chi2 38.9, p < 0.0001), yet these nets retained good insecticidal efficacy for up to 15 wash cycles, producing a 72.5% mean mortality of an. minimus 24 hours after a 3-minute exposure in world health organization cones ... | 2009 | 19842429 |
| wash-resistance and field efficacy of olyset net, a permethrin-incorporated long-lasting insecticidal netting, against anopheles minimus-transmitted malaria in assam, northeastern india. | the long-lasting insecticidal nets are ready-to-use, pretreated nets, which do not require retreatment for 4-5 years. olyset nets that are made of high-density polyethylene monofilament yarn with 2% w/w permethrin incorporated (corresponding to 1 g/m(2)) are type-2 in which insecticide is incorporated into the polymers and are wash resistant. in these, insecticide migrates to the surface of the netting fiber to be bioavailable against mosquitoes and other insect pests. study site and objectives: ... | 2010 | 19874188 |
| breeding and day resting habitats of anopheles dirus in assam, india. | longitudinal surveys at monthly frequency were carried out during 1995-1996 in a forest fringed village of district dibrugarh, assam to decipher the breeding and day resting habitats of anopheles dirus. it regularly bred in small, shallow, rain filled, transient, shady or partly shady puddles/ground pools in the rainy months and in the perinneal streams in the adjoining forest of the village during dry months. in pools, the degree of interspecific association (0.238 +/- 0.174) and index of assoc ... | 1997 | 9561617 |
| role of anopheles culicifacies during an outbreak of malaria in gorubandha p.h.c., assam. | entomological investigation during an outbreak of malaria in gorubandha phc in sonitpur district revealed unusually high density of anopheles culicifacies followed by an.minimus. parity rates of both the species were very high, 65% and 62.2% respectively. an. culicifacies was incriminated as malaria vector. sporozoite rate recorded was 0.63%. both the species were found susceptible to ddt. this substantiates the epidemiological observation which yielded 98% plasmodium falciparum malaria out of 3 ... | 1997 | 9465529 |
| epidemiological and entomological aspects of malaria in forest-fringed villages of sonitpur district, assam. | detailed epidemiological and entomological studies were undertaken in forest-fringed villages and a tea estate in sonitpur, assam to assess the malaria situation. | 2004 | 15332480 |
| a report on the susceptibility status of anopheles minimus (theobald) against ddt and deltamethrin in three districts of assam. | | 2004 | 15332486 |
| malaria transmission risk by the mosquito anopheles baimaii (formerly known as an. dirus species d) at different hours of the night in north-east india. | the risk of acquiring malaria transmitted by anopheles baimaii sallum & peyton, 2005, formerly known as an. dirus species d (sallum et al., 2005) (diptera: culicidae), at different hours of the night in a forest-fringed village of assam, north-east india was assessed through all-night mosquito landing catches during 1995-2000. an estimated overall mean biting rate of 36.1 bites/person/night (95% ci = 26.2-45.8), a sporozoite rate of 1.9% (95% ci = 1.1-2.9%) and a parous rate of 58.7% (95% ci = 5 ... | 2005 | 16336307 |
| potential of anopheles philippinensis-nivipes complex mosquitoes as malaria vector in north-east india. | anopheles philippinensis-nivipes complex mosquitoes, captured in outdoor human landing catches and light traps in human dwellings from four different sites in assam state and adjoining areas, were examined (n=1670) for the presence of circumsporozoite antigen (csa) through enzyme linked immunosorbent assays (elisa), using species specific capture monoclonal antibodies, of plasmodium falciparum and two plasmodium vivax polymorphs (pv 210 and vk 247). in elisa, 28 pools were found positive for csa ... | 2005 | 16459563 |
| anopheles minimus: its bionomics and role in the transmission of malaria in assam, india. | indoor, day-resting collections of anopheles minimus mosquitos from human dwellings in the study area in assam, india, indicated that these insects were prevalent throughout the year and that their maximum abundance occurred from march to august. a. minimus was identified as a vector of malaria, and sporozoite infections were recorded every month of the year, with the highest rating occurring in october. the mosquito was highly anthropophilic and fed on human hosts (indoor) all through the night ... | 1996 | 8653817 |
| breeding habitats of anopheline mosquitoes in assam. | | 1994 | 7958127 |
| deltamethrin impregnated bednets against anopheles minimus transmitted malaria in assam, india. | of the 20 anopheles species caught in villages in sonapur, assam, only an. minimus was incriminated as a malaria vector by finding sporozoites in the salivary glands. it was found to be endophagic and endophilic in assam and because its biting peaked after midnight it was a suitable target for insecticide impregnated bednets. after the withdrawal of ddt spraying and collecting a year's baseline data, deltamethrin impregnated nets were distributed in 3 villages, untreated nets were distributed in ... | 1995 | 7714940 |
| a preliminary report on some entomological observations in malaria endemic areas of kamrup district, assam. | | 1985 | 4031440 |
| malaria control in a forest camp in an oil exploration area of upper assam. | assam, in north-east india, is extremely rich in hydrocarbon deposits and the oil industry is the major contributor to its economy. a large number of oil fields and related installations in assam are located in forest areas or on their fringes where malaria is a serious problem among field staff and security personnel, adversely affecting oil production. we carried out an operational research study for one year in a forest-based industrial security camp of dibrugarh district and developed an eff ... | 2003 | 12929855 |
| role of the prevalent anopheles species in the transmission of plasmodium falciparum and p. vivax in assam state, north-eastern india. | in north-eastern india, anopheles minimus, an. dirus and an. fluviatilis are considered the three major vectors of the parasites causing human malaria. the role in transmission of the other anopheles species present in this region is not, however, very clear. to examine the vectorial role of the more common anopheline mosquitoes, the heads and thoraces of 4126 female anopheles belonging to 16 species (collected using miniature light traps set in human dwellings in a foothill village in the jorha ... | 2004 | 15324463 |
| identification of two cryptic species in the anopheles (cellia) annularis complex using ribosomal dna pcr-rflp. | anopheles (cellia) annularis van der wulp is a complex of two sibling species provisionally designated as species a and b and can only be differentiated on the basis of the paracentric inversion in the ovarian polytene chromosomes. to analyze the distribution of these two species and to develop a molecular method for the identification of these two cryptic species, we sequenced the ribosomal dna internal transcribed spacer 2 (its2) and domain 3 (d3) of a. annularis specimens collected from sonap ... | 2007 | 17149605 |
| physico-chemical characteristics of breeding habitats of anopheles dirus (diptera:culicidae) in assam, india. | larval ecology of anopheles dirus, the main vector of forest malaria in north-eastern region of india, was studied in relation to physico-chemical characteristics of its breeding habitats in a rain forest area of assam, india. shady stream side pools, positive for the breeding of an. dirus, had significantly higher amounts of total hardness (p < 0.024) in comparison to negative pools of similar type. when compared with an. dirus negative breeding habitats, in hot-wet as well as in cool-dry seaso ... | 2002 | 12617325 |
| an outbreak of plasmodium falciparum malaria due to anopheles minimus in central assam, india. | epidemiological investigations were conducted in nellie subcentre, phc jhargaon, under morigaon district (assam). the results of fever cases revealed 68 per cent slide positivity rate (spr) and 40 per cent slide falciparum rate (sfr). the pf proportion was > 87 per cent and remaining cases were p. vivax infections. an. minimus was incriminated as a malaria vector during the study period. the sporozoite rate was 3.08 per cent. the indoor man mosquito contact was 35 per bait/night as against 23 in ... | 2001 | 11963818 |
| epidemiological observations on malaria in some parts of darrang district, assam. | a study on malaria conducted in tribal villages of darrang district, assam during april 1994 to march 1995 revealed that the malaria incidence due to plasmodium falciparum was considerably high. slide positivity rate (spr) ranged between 2.3 to 45.67 per cent with transmission from may to october. p. falciparum was the dominant species (91.7 per cent) followed by p. vivax (7.25 per cent) and mixed infection (pv + pf = 1.05 per cent). malaria cases were recorded throughout the year in all the age ... | 2001 | 11963817 |
| characterization of its2 rdna of anopheles philippinensis and anopheles nivipes (diptera: culicidae) from north-east india. | anopheles (cellia) philippinensis ludlow and anopheles (cellia) nivipes (theobald) are two closely related, morphologically very similar, mosquito species in the annularis group, which play a supportive role in malaria transmission in north-east india. we amplified and performed sequence analysis for the internal transcribed spacer 2 (its2) locus of ribosomal dna (rdna) gene of morphologically confirmed specimens of these two species from the states of assam and nagaland. an. philippinensis and ... | 2006 | 17333766 |
| anopheline fauna of parts of darrang district, assam with reference to malaria transmission. | | 2007 | 18697598 |
| molecular evidence of misidentification of anopheles minimus as anopheles fluviatilis in assam (india). | anophelesminimus s.l. and anophelesfluviatilis s.l., two closely related taxa, are reported vectors of malaria in assam state of india. we determined the dna sequences of morphologically identified a. minimus s.l. and a. fluviatilis s.l. collected from the kamrup district in assam, for two rdna loci-internal transcribed spacer 2 (its2) and d3 domain of 28s rdna (28s-d3). analysis of rdna data revealed that the sequences of both the morphologically identified a. minimus s.l. and a. fluviatilis s. ... | 2010 | 19913489 |
| spatial distribution and r-dna second internal transcribed spacer characterization of anopheles dirus (diptera: culicidae) complex species in north-east india. | the identity and distribution of the prevalent member species of the anopheles dirus complex mosquitoes in the north-eastern region of india was investigated in a cross-sectional study. we altogether collected 267 individuals of an. dirus s.l. from 27 forested/forest fringed locations spread across the seven north-eastern states, identified the species using a ribosomal dna (r-dna) second internal transcribed spacer (its2) based allele specific polymerase chain reaction (aspcr) method and sequen ... | 2010 | 20074537 |
| seasonal prevalence of anopheles dirus and malaria transmission in a forest fringed village of assam, india. | seasonal abundance of anopheles dirus (s.l.) and malaria prevalence in an isolated forest fringed village was monitored at monthly intervals during august 1995 to july 1996. an. dirus was the only vector species detected during the study period. its density pattern showed distinct seasonality with the peak occurring in the month of july and very low number during cool dry months. positive correlation (r = 0.721) was found between the density of an. dirus and the amount of rainfall occurring two ... | 1997 | 9519567 |
| physiographic and entomologic risk factors of malaria in assam, india. | fever surveys were conducted in several districts of the indian state of assam to ascertain the prevalence of malaria in relation to vector abundance, entomologic inoculation rates (eirs), and geographic location of human settlements. anopheles minimus were incriminated, but their relative abundance and biting rates varied among districts, and no significant correlation was observed between these two indicators (r = 0.43, p = 0.34). plasmodium falciparum was the predominant parasite species exce ... | 2004 | 15516642 |
| taxonomical observations on anopheles philippinensis/nivipes group mosquitoes in north-east india. | to examine the distribution pattern of anopheles philippinensis and an. nivipes, mosquitoes belonging to an. philippinensis/nivipes group were collected from five sites in north-east indian state of assam and its adjoining areas and identified. presence of both an. philippinensis and an. nivipes, with predominance of the latter taxon, was recorded with conformity on the basis of pupal paddle characteristics. based on adult wing characters, 91.4% specimens were identified as an. philippinensis an ... | 2004 | 16506549 |
| molecular characterization and species identification of the anopheles dirus and an. minimus complexes in north-east india using r-dna its-2. | the sibling species composition of the anopheles minimus and anopheles dirus complexes is poorly known in the highly malarious north-eastern region of india where these two vector taxa are accountable for most of the malaria transmission among 30.7 million inhabitants. prevalent members of these two complexes in this part of india were identified using sequences for the second internal transcribed spacer (its2) of ribosomal dna. anopheles baimaii (species d) of the an. dirus complex and an. mini ... | 2006 | 17118324 |
| malaria situation in forest-fringed villages of sonitpur district (assam), india bordering arunachal pradesh during an outbreak. | epidemiological and entomological studies were undertaken in forest-fringed villages in sonitpur district (assam) bordering arunachal pradesh, india to assess the malaria situation. blood smears (thick and thin) were collected from the fever cases through door-to-door survey. both the blood smears stained with giemsa were used for malaria parasite detection. slide positivity rate (spr) was recorded as 39.1% with predominance of plasmodium falciparum (97.1%) infections. children between 5 and 14 ... | 2007 | 17896624 |
| wash resistance and residual efficacy of long-lasting polyester netting coated with alpha-cypermethrin (interceptor) against malaria-transmitting mosquitoes in assam, northeast india. | malaria is endemic in assam, northeast india, with low-to-moderate transmission of the causative parasites, mostly by anopheles minimus. plasmodium falciparum is the predominant parasite (>60%), with remaining cases being due to p. vivax. as an alternative intervention for malaria control, long-lasting insecticidal nets [interceptor coated with alpha-cypermethrin 10% suspension concentrate (sc), 0.667% w/w, 0.2g/m(2)] underwent field evaluation for laboratory wash resistance and residual efficac ... | 2010 | 19762058 |