Assuntos
Bulinus/parasitologia , Doenças dos Bovinos/parasitologia , Esquistossomose/veterinária , Animais , Bovinos , Cricetinae , Reservatórios de Doenças/veterinária , Vetores de Doenças/isolamento & purificação , Quênia , Schistosoma/isolamento & purificação , Esquistossomose/transmissão , OvinosAssuntos
Modelos Animais de Doenças , Peste/veterinária , Animais , Formação de Anticorpos , Comportamento Animal , Vetores de Doenças/isolamento & purificação , Abrigo para Animais , Imunidade , Pasteurella/isolamento & purificação , Peste/mortalidade , Peste/transmissão , Ratos , Estações do Ano , SifonápterosAssuntos
Grupos de População Animal/parasitologia , Animais Selvagens/parasitologia , Anticorpos Antibacterianos/análise , Vetores de Doenças/isolamento & purificação , Ácaros/microbiologia , Orientia tsutsugamushi/imunologia , Ratos/parasitologia , Trombiculidae/microbiologia , Animais , Trombiculidae/imunologiaRESUMO
A brief review of the species of the genus Triatoma that have been described in some epidemiology books is made. Triatoma rubrofasciata has been found at the Oriente province in our country. Triatoma flavida has been found at the Pinar del Río, Las Villas, Camagüey, and Oriente provinces. Both insects transmit the Chagas' disease.
Assuntos
Doença de Chagas/transmissão , Vetores de Doenças/isolamento & purificação , Triatominae/isolamento & purificação , Animais , Cuba , Humanos , Trypanosoma cruzi/isolamento & purificaçãoRESUMO
In the present ecological study of cercarial transmission of Schistosoma haematobium in the Volta Lake, Ghana, habitat observations and sampling of Bulinus truncatus rohlfsi were conducted within a 60-km stretch of shoreline. Observations revealed that human water contact sites in each village undergo constant changes in shape and vegetation. Snail sampling surveys in water contact sites were carried out monthly (for 27 months) in 8 villages using newly designed palm-leaf traps, and in 8 additional villages (for 16 months) using a modification of Olivier & Sneidermann's man-time method. Results to date confirm the finding by Chu & Vanderburg that cercarial transmission in the lake takes place almost exclusively within water contact sites. Additional results indicate that even within individual water contact sites this transmission is focal, most infected snails being found very close to the shoreline. Transmission also varies significantly according to shape, vegetation, and geographical location of the water contact sites, and is distinctly seasonal in most villages. These findings lead us to conclude that control of cercarial transmission in the Volta Lake is both attainable and feasible with existing methods.
Assuntos
Bulinus/parasitologia , Ecologia , Schistosoma haematobium , Animais , Bulinus/isolamento & purificação , Clima , Vetores de Doenças/isolamento & purificação , Água Doce , Geografia , Gana , Humanos , Esquistossomose/prevenção & controle , Esquistossomose/transmissão , Movimentos da ÁguaRESUMO
By means of the method of determining the isoelectric point, the same conditions of absorption and stain intensity as in Dientamoeba cultivation forms were determined in cells found in Enterobius vermicularis eggs of Dientamoeba fragilis carried. By that way, identity of both stages, as well as function of pinworms as Dientamoeba fragilis vectors were confirmed.
Assuntos
Dientamoeba/isolamento & purificação , Enterobius/microbiologia , Óvulo/microbiologia , Animais , Dientamoeba/citologia , Vetores de Doenças/isolamento & purificação , Enterobius/citologia , Feminino , Ponto Isoelétrico , Óvulo/citologiaRESUMO
The hair follicle mites Demodex folliculorum and D. brevis are the most common permanent ectoparasites of Man. Ordinarily they are harmless to their human host and appear to be of no medical significance. We present, however, an unusual finding regarding this mite, namely, that in a potassium hydroxide mount of a skin scraping from a mycotic plaque we found numerous Demodex mites containing inside them spores of Microsporum canis. This could mean that the putatively inoffensive Demodex has the potential to ingest various microorganisms that are found in its niche and transport them to other areas of the skin or possibly to other individuals.
Assuntos
Ácaros e Carrapatos/microbiologia , Dermatomicoses/microbiologia , Vetores de Doenças/isolamento & purificação , Microsporum/isolamento & purificação , Infestações por Ácaros/parasitologia , Adulto , Animais , Feminino , Humanos , Infestações por Ácaros/microbiologiaRESUMO
An epidemic of yellow fever occurred in the eastern part of Nigeria during the second half of 1986. Oju, in Benue State, was the most heavily affected region, but yellow fever also occurred in surrounding areas, particularly Ogoja, in Cross River State. In Oju, the mean attack and mortality rates were 4.9% and 2.8%, respectively. Sex and age specific rates were highest in males and in the 20-29 yr age group. The overall case fatality rate was approximately 50%. Diagnosis was confirmed by IgM capture enzyme-linked immunosorbent assay (ELISA) and complement fixation (CF) tests. Entomological investigations implicated Aedes africanus as the epidemic vector. Oju alone probably had about 9800 cases of yellow fever with jaundice, and some 5600 deaths. Outbreaks of this nature could be prevented by inclusion of yellow fever in the Expanded Programme on Immunisation, in areas subject to recurrent epidemics.