vectorial competence of aedes aegypti (linnaeus 1762) rio de janeiro strain, to dirofilaria immitis (leidy 1856).dirofilaria immitis (leidy 1856), a nematode parasite, is the etiologic agent of canine heartworm disease and mosquitoes are essential intermediate hosts. mosquito susceptibility to the worms differ with species, strains and also among individuals of the same strain. to evaluate the degree of susceptibility of rio de janeiro laboratory raised strain of aedes aegypti, we fed mosquitoes on canine blood with different densities of microfilariae (mf). there was no significant difference in the rate ...200111500754
chemoprophylaxis of dirofilaria immitis (leidy 1856) infection at a high challenge environment.the frequency of canine heartworm infection in the state of rio de janeiro, brazil was high before chemoprophylactic treatment was available, with one of the highest rates of infection (52.5 %) found among dogs living on the eastern shore of the state. following the launch of a chemoprophylactic product, the rate of infection gradually decreased, and new infections were rarely reported. after 2005, outbreaks reported at the eastern shore as well as for new infections in other areas of high infec ...201526459036
potential vectors of dirofilaria immitis (leidy, 1856) in itacoatiara, oceanic region of niterói municipality, state of rio de janeiro, brazil.dirofilaria immitis is a widespread mosquito-borne parasite that causes dirofilariasis, a commonly diagnosed disease of dogs that is rarely reported in cats and humans. a mosquito survey was conducted in itacoatiara in the state of rio de janeiro, from march 1995 to february 1996, using canine, feline and human baits. a total of 3,667 mosquitoes were dissected for d. immitis larvae, representing 19 species and 10 genera. from those, ae. scapularis, ae taeniorhynchus, cx. quinquefasciatus, cx. de ...19989711329
survey of dirofilaria immitis (leidy, 1856) in random source cats in metropolitan rio de janeiro, brazil, with descriptions of evaluate the prevalence of heartworm disease in metropolitan rio de janeiro, rj, brazil, cats submitted for euthanasia were evaluated by laboratory tests and by necropsy for signs of heartworm infection. of the 135 cats examined, one (0.8%)--a stray male from an urbanizing district--had one male worm (14.5 cm) in the left lung and showed severe muscular hypertrophy of small pulmonary arteries and arterioles with no right ventricle enlargement or passive congestion. microfilariae were not dete ...19979299698
attraction of mosquitoes to domestic cats in a heartworm enzootic region.heartworm disease is caused by a mosquito-borne parasite that can affect many different mammalian species and has worldwide distribution. the agent, dirofilaria immitis (leidy 1856), infect mainly dogs but feline infection have been frequently reported in the last decade. feline heartworm infection is difficult to detect, therefore, low reported prevalence could reflect true low prevalence or poor diagnostic efficiency. as mosquitoes are known to be attracted differently by different mammalian s ...200717383920
mosquito frequency and feeding habits in an enzootic canine dirofilariasis area in niterói, state of rio de janeiro, brazil.heartworm, a chronic fatal mosquito-borne canine disease, is frequently diagnosed in dogs from the state of rio de janeiro, where its prevalence is 29.7% in the city of niterói. nevertheless it is rarely detected in cats (0.8%) from the same state. dogs are the primary source of infection to mosquitoes. because cats either do not demonstrate microfilaremia or it is too low and transient for transmission. a mosquito survey was conducted in itacoatiara, niterói, from march 1995 to february 1996, u ...19989698883
sanitary conditions of a colony of urban feral cats (felis catus linnaeus, 1758) in a zoological garden of rio de janeiro, brazil.the colony of urban stray cats living in the rio de janeiro zoological garden was studied in order to develop a population and health control program. as many cats as possible were captured during two months (47 animals) and were classified according to gender, age, weight and coat markings. they were submitted to a general health evaluation, examined for the presence of ectoparasites and sent to a surgical neutering program. all animals had a blood sample drawn for cbc, platelet count, heartwor ...200415517031
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