Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 22
Filtrar
Mais filtros










Filtros aplicados
Base de dados
Intervalo de ano de publicação
3.
Trans R Soc Trop Med Hyg ; 91(1): 57, Jan.-Feb. 1997.
Artigo em Inglês | MedCarib | ID: med-2123

RESUMO

Myiasis is caused by larvae of flies belonging to 3 families of Diptera, the Oestridae, Calliphoridae and Sarcophagidae, which feed on living and dead tissue. Members of the first 2 families are the main cause of human myiasis in Latin American (HALL, 1995). In Central and South America, cases of human myiasis resulting from the oestrid or warble fly, Dermatobia hominis L., are well documented (PRASAD &BECK, 1969; SANCHO, 1988). However, this type of myiasis was thought not to occur in humans in the islands of the Caribbean (RAWLINS, 1988), probably because of its low incidence or low rate of detection. Only 2 human cases of myiasis due to D. hominis were reported between 1940 and 1984 (RAJU et al., 1986). In contrast, myiasis due to Cochliomyia hominivorax Coq., which is known to parasitize humans and other mammals, is well documented throughout South and Central America as well as in Jamaica and Trinidad (RAWLINS et al., 1983) and Cuba (FAO, 1996) in the Caribbean region. During 1988 our interest in human myiasis was stimulated when a specimen of D. hominis was brought to the laboratory for identification. Following this initial case, numerous other cases were detected among the Trinidad population. In this paper we report 20 cases of D. hominis parasitism which have been detected in Trinidad over the last 8 years.(AU)


Assuntos
Adolescente , Adulto , 21003 , Feminino , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Dípteros , Miíase/epidemiologia , Agricultura Florestal , Miíase/parasitologia , Árvores , Trinidad e Tobago/epidemiologia
4.
Ann N Y Acad Sci ; 791: 233-40, July 23, 1996.
Artigo em Inglês | MedCarib | ID: med-2983

RESUMO

The Screwworm Eradication Program has been extremely successful in its efforts to achieve its goal of eradication of screwworms through Central America and establishement of a permanent biological barrier in the eastern half of Panama. Following eradication of screwworms from Mexico in 1991, eradication was achieved in Belize in 1992, in Guatemala in 1993, and in El Salvador in 1994. Honduras has been free of screwworms since Janaury 1995, and the number of cases in Nicaragua has dropped, as of April 1995, to about 4 percent of the average number of cases found during the period June-August 1993. (AU)


Assuntos
21003 , Masculino , Dípteros , Ectoparasitoses/epidemiologia , Ectoparasitoses/prevenção & controle , Ectoparasitoses/veterinária , Controle de Pragas/métodos , Infertilidade Masculina , América Central/epidemiologia , Estados Unidos , United States Department of Agriculture
6.
West Indian med. j ; 44(3): 106-7, Sept. 1995.
Artigo em Inglês | MedCarib | ID: med-5880

RESUMO

Data are presented on a case of cutaneous furuncular myiasis in a Jamaican resident. This condition is virtually unknown in the Caribbean, but is endemic in Central and South America. The infection, which was caused by Dermatobia hominis, was acquired in Belize and was misdiagnosed and treated as infected insect bites. Cutaneous furuncular myiasis should be considered in patients with sub-acute inflammatory nodular skin lesions with a history of recent travel to endemic countries (AU)


Assuntos
Relatos de Casos , Feminino , Miíase/diagnóstico , Dermatopatias Parasitárias/diagnóstico , Belize , Larva , Viagem , Dípteros
7.
Acta Leidensia ; 57(1): 1-27, 1988. tab
Artigo em Inglês | MedCarib | ID: med-2242

RESUMO

Notes are given on the distribution, biology and potential medical importance of 36 species of Culcidae (mosquitoes), 6 Psychodidae (sandflies), 14 Ceratopogonidae (biting midges), 3 Simuiidae (blackflies) and 14 Tabanidae (horseflies and deerflies) collected in Suriname from November 1978 to May 1982, mostly on human bait at night, in or near buildings. New records for Suriname are included for 5 species (1 Culicid, 1 Psychodid, 2 Simulids and 1 Tabanid). Mosquito attack rates were generally low in the rainforest region, with Anopheles darlingi and Psorophora albipes predominant; higher in the savanna region, with Culex portesi and Coquillettidia venezuelensis predominant; and also in the coastal region, with Ae. scapularis, Ae. serratus, Anopheles aquasalis, An. braziliensis and Mansonia titillans predominant in catches outdoors. Culex quinquefasiatus females were common in houses in the coast region and in settlements in the rainforest with septic tank systems. Aedes aegypti females were common in the coast region and also present in many villages in the rainforest, were Haemagogus janthinomys females, potential vectors of jungle yellow fever, were also found. Only 16 Psychodid females were found. the commonest were found, the commonest being Lutzomyia flaviscutellata and Lu. umbratilis. Ceratopogonidae were occasionaly troublesome in the rainforest region, with Culicoudes paraesis, C.pseudodiabolicus and C.foxi predominant; abundant near mangrove swamps in the coast region, with C. guyanensis and C. trinidadensis predominant. Simulium guianense females were troublesome in several localities in the rainforest region. The commonest Tabanids on human bait were Fidena pseudoaurimaculata and Dichelacera marginata in the rainforest region, Diachlorus bicinctus in the savanna region, Chrysops tristis in the coastal region and Lepiselaga crassipes in all regions......(AU)


Assuntos
Resumo em Inglês , Dípteros , Suriname
8.
J Econ Entomol ; 76(2): 330-6, Apr. 1983.
Artigo em Inglês | MedCarib | ID: med-9320

RESUMO

When eggs of various strains of the screwworm, Cochliomyia hominivorax (Coquerel), were treated with a coumophos emulsion, resistance was as follows: 1.0- to 2.0-fold (SW USA), 3.0-fold (El Salvador), 4.9 to 11.3-fold (NE Mexico), 5.6 to 10.2-fold (NW Mexico), and 78.1-fold (Jamaica). The pattern seemed to correlate with a history of insecticide use in the areas of origin. The resistance of the Jamaica population was recessive and not controlled by a single major gene, as indicated by the F1 hybrids. Further intense selection of the Jamaica strain failed to increase the shallow slopes of the dosage-mortality regression lines. Attempts at selecting insecticide-resistant strains from adults of laboratory populations (Aricruz strain) by using very high selection pressures(75 to 95 percent mortality) with insecticide-treated food proved futile. Over five to six generations the maximum tolerance seen were 1.0 to 2.1-fold to DDT, 1.5-to 6.5-fold to dieldrin, 1.7s-to 1.8-fold to propoxur, and 5.0-to 6.5-fold to coumaphos. Other selections with adults of the GDI strain (from NW Mexico) under pressure with DDT or coumaphos over 8 to 11 generations suggested great diversity in tolerance but no resistance (AU)


Assuntos
21003 , Resistência a Inseticidas , Dípteros , Cumafos , Infecção por Mosca da Bicheira , Jamaica
9.
Trop Geogr Med ; 33(1): 58-60, Mar. 1981.
Artigo em Inglês | MedCarib | ID: med-14772

RESUMO

Two species complexes: S. incrustatum and S. amazonicum form the Lethem area, Rupununi district, Guyana have been observed to show simmilar biting habits to African species mainly the damnosum complex but unlike those in the Americas. The observations are significant since it indicated that these potential vectors of onchocerciasis, "River Blindness", have the capacity for optimum trasmission of microfilariae of Onchocerca volvulus in the Rupununi,Guyana (AU)


Assuntos
Humanos , 21003 , Feminino , Dípteros , Comportamento Alimentar , Antebraço , Guiana , Cabelo , Perna (Organismo)
10.
Trop Geogr Med ; 33(1): 55-7, Mar. 1981.
Artigo em Inglês | MedCarib | ID: med-14773

RESUMO

Abate (emulsifiable concentrate) for the control of Blackfly larvae was used in the river Burru, Lethem, Rupununi, Guyana. The results showed that it was not effective at 0.5 p.p.m. against larvae of S. incrustatum (AU)


Assuntos
21003 , Temefós , Dípteros , Controle de Insetos/métodos , Inseticidas Organofosforados , Guiana , Larva
11.
Bull Entomol Res ; 71: 97-105, 1981.
Artigo em Inglês | MedCarib | ID: med-9400

RESUMO

Between June 1976 and November 1977, man-baited and truck-trap collections of Haematophagous Diptera were made on the foreshore of Las Cuevas Bay, north Trinidad, close to a fishing village where Mansonella ozzardi infections are prevalent in man. Culicoides phlebotomus (Will.) predominated in all collections, forming 96.1 percent of the total catch. Analysis of blood-meals from engorged C. phlebotomus collected by truck trapping at sunset indicated frequent feeding on mammals, with feeds on man comprising 47 percent of those identified. Filarial larvae were found in 0.8 percent of 6767 females of C. phlebotomus captured on man, and five (0.08 percent) had infective larvae of M. ozzardi. Similarly, 1.3 percent of 7028 females obtained by truck trapping were infected, including nine (0.13 percent) with infective larvae. Growth rates of M. ozzardi in C. phlebotomus were determined by experimental infection and were used to estimate daily survival rates of wild-caught females of C. phlebotomus based on filarial growth stages found in them. The daily survival rate varied from 85 to 95 percent in flies 1-3 days after infection to 69 percent in flies six days after infection. It was estimated that a person spending one hour on the beach every morning would receive 38 infective bites from C. phlebotomus per annum. (AU)


Assuntos
21003 , Filariose/transmissão , Ceratopogonidae , Mansonella/parasitologia , Dípteros/parasitologia , Mansonella/parasitologia , Trinidad e Tobago , Ceratopogonidae/parasitologia , Testes de Precipitina
12.
West Indian med. j ; 22(4): 199, Dec. 1973.
Artigo em Inglês | MedCarib | ID: med-6197

RESUMO

This paper present some of the data obtained during three visits to the Rupununi Savannahs of Guyana in 1969 and 1970 to define the nature of the "Kabowra Fly" problem. Collections of biting flies and immature forms, from which adults were reared, were made at Lethem, Orinduik and Kato during the beginning and end of the dry season. Identification of the species found was made difficult by the lack of previuos literature on the simuliidae of the area. However, at least thirteen species have been found breeding in the nearby rivers and streams. Four species were found biting. Of these only Simulium guianense Wise could be identified with certainty. At Lethem and Manari, the most heavily populated areas, the nuisance was due to one species (near S. Incrustatum). A small species, possibly S. sanguineum was biting at Dadanawa, Orinduik, Good Hope and Kato, whilst S. guianense was also found at Orinduik, and a fourth unidentified species at Kato. It was concluded that because at least four species are involved in the problem, and since so little is known of their habits and taxonomy, any further field investigation will require the support of a detailed tazanomic study (AU)


Assuntos
21003 , Dípteros , Guiana
14.
Br J Dermatol ; 86(8 (Suppl.)): 55-61, 1972.
Artigo em Inglês | MedCarib | ID: med-14502

RESUMO

Following the major epidemic of acute glomeronephritis in Trinidad in 1964 and 1965, streptococcal skin infection was studied among school children. Infection was found on 1.5 percent of the children in an urban school. Simultaneous infections with more than one strain of Streptococcus pyogenes were found in some children, and also the replacement of one strain by another between weekly swabbings. Skin infection was more prevalent at a rural school (15 percent). In a year-long study the frequency of infection was found to be related to poverty, and to age and sex, diminishing with increasing age more rapidly in females than in males. The average for the school was one new streptococcal infection per child per 10 weeks. Spread was usually from skin to skin, possibly assisted by non-biting Hippelates flies; involvement of nose or throat was commonly secondary to skin infection (Summary)


Assuntos
Humanos , Pré-Escolar , Criança , Adolescente , Masculino , Feminino , Streptococcus pyogenes/patogenicidade , Pioderma/etiologia , Nefrite/complicações , Trinidad e Tobago , Fatores Etários , Fatores Socioeconômicos , Infecções Estreptocócicas/imunologia , Infecções Estreptocócicas/transmissão , Sexo , Dípteros/microbiologia
15.
Trans R Soc Trop Med Hyg ; 64(1): 138-47, 1970.
Artigo em Inglês | MedCarib | ID: med-12699

RESUMO

An epidemic of acute glomerulonephritis in Trinidad led to an investigation into strepococcal skin infection, as most nephritis cases were asssociated with this. Hippelates in this region commonly feed on skin lesions, infected or otherwise. Some of these flies captured in the vinicity of infected children were found to be contaminated with Streptococcus pyogenes; 3 species were involved, H. peruanus, H. flavipes and H. currani. The naturally-acquired infection lasted for 28 hours or more, and the flies would return to human bait while still infectious. The Hippelates population and the streptococcal skin infection rate at one school showed similar changes. Hippelates probably contribute to the rapid spread of streptococci throughout the island, and to the frequency of infection with more than one serotype; they may also contribute to the high incidence of streptococcal skin infection, but this requires further evidence. (AU)


Assuntos
Humanos , Criança , Vetores de Doenças , Dermatopatias Infecciosas/complicações , Dermatopatias Infecciosas/etiologia , Infecções Estreptocócicas/complicações , Infecções Estreptocócicas/etiologia , Dípteros , Glomerulonefrite/complicações , Streptococcus pyogenes/isolamento & purificação , Trinidad e Tobago
17.
Am J Trop Med Hyg ; 17(2): 253-68, Mar. 1968.
Artigo em Inglês | MedCarib | ID: med-12447

RESUMO

Bush Bush Forest entomologic investigations were concered mainly with mosquitoes, the most conspicuous element of the bloodsucking arthropod fauna. More than 92 species were demonstrated, but only about two dozen were common. Mosquitoes were studied in relation to thier physical environment, seasonal activity, diel activity, horizontal stratifaction in the forest, food preferences, and larval habitats. Large numbers were collected for virus studies. Other groups investigated were phlebotomine flies (10 species), Culicoides flies (10 species), horseflies (18 species), Cuterebridae (one species), sucking lice (four species), fleas (one species), ticks (nine species), and various mites including 15 species of trombiculid. (AU)


Assuntos
21003 , Arbovírus , Vetores Artrópodes/crescimento & desenvolvimento , Culicidae/crescimento & desenvolvimento , Adaptação Biológica , Aedes/crescimento & desenvolvimento , Anopheles/crescimento & desenvolvimento , Culex/crescimento & desenvolvimento , Dieta , Dípteros/crescimento & desenvolvimento , Ecologia , Meio Ambiente , Camundongos , Ácaros/crescimento & desenvolvimento , Culicidae/classificação , Estações do Ano , Carrapatos/crescimento & desenvolvimento , Trinidad e Tobago
18.
Am J Trop Med Hyg ; 17(2): 237-52, Mar. 1968.
Artigo em Inglês | MedCarib | ID: med-12448

RESUMO

The field program of the Trinidad Regional Virus Laboratory in Bush Bush Forest included studies in which arboviruses (their prevalence and epidemiology) were the chief interest and also studies on the biology of the arthropods and vertebrates possibly associated with arbovirus cycles. The techniques used included the exposure of sentinel animals, trapping and bleeding of small mammals and reptiles, netting and bleeding of birds, collection of bloodsucking arthropods, and observations on the diel- and seasonal-activity patterns, food sources, and habitat preferences of the more abundant species of mosquitoes.(AU)


Assuntos
21003 , Arbovírus , Vetores Artrópodes , Aves , Mordeduras e Picadas , Galinhas , Dípteros , Reservatórios de Doenças , Ecologia , Métodos Epidemiológicos , Lagartos , Mamíferos , Culicidae/crescimento & desenvolvimento , Estações do Ano , Carrapatos , Trinidad e Tobago
19.
J Med Entomol ; 5(1): 53-66, Feb. 1968.
Artigo em Inglês | MedCarib | ID: med-12286

RESUMO

Data given show that in Jamaica, Leptoconops becquaerti is polymorohic for wing length in both sexes. The polymorphism is associated with autogeny so that in a given population the smaller ** are autogenous, the larger anautogenous. The autogenous ** emerge from the pupa with ovaries already in early Stage IV of development; at 26.6 C egg maturation is completed within 24-36 hr post-emergence. The number of eggs produced autogenously in the 1st genotrophic cycle is comparable with that seen in anautogenous ** fully engorged with blood and kept under optimum conditions. Larval environment does not appear to affect the expression of autogeny by regulating the proportion of ** that produce eggs without taking blood. Instead, it appears that wing length polymorphism and autogeny are entirely under genetic control. Some observations on mating and resting behaviour in the field are described. Reasons are given for believing that human discomfort is caused almost entirely by anautogenous * L. becquaerti. (AU)


Assuntos
21003 , Cruzamento , Dípteros , Polimorfismo Genético , Jamaica
20.
Ann Trop Med Parasitol ; 60(3): 365-72, Sept. 1966.
Artigo em Inglês | MedCarib | ID: med-13019

RESUMO

A rodent strain of Leishmania mexicana was transmitted to man by the bites of two experimentally infected specimens of Lutzomyia cruciata. Some factors infleuncing the transmission of the parasite to mammalian hosts, and the significance of transmission experiments are discussed briefly. Despite the experimental evidence, further evidence is needed before Lu. cruciata can be considered a natural vector of dermal leishmaniasis in British Honduras.(Summary)


Assuntos
Humanos , Cricetinae , 21003 , Dípteros , Insetos Vetores , Leishmaniose Mucocutânea , Belize
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...