Ectopic Migration of an Adult Heartworm in a Dog with Dirofilariasis (Case Report)

A 3-yr-old female mongrel dog was referred to the Veterinary Teaching Hospital of Chungnam National University in the Republic of Korea. An adult heartworm, Dirofilaria immitis, was found in the abdominal cavity of the dog during spaying. Dirofilariasis in this dog was also diagnosed by modified Knott's test, ELISA test, and PCR analysis. The present case is the first report on the migration of an adult dog heartworm to the abdominal cavity of a dog in the Republic of Korea.

Autogenous Aedes togoi sub-colony (Chanthaburi, Thailand strain), an efficient laboratory vector in study of filariasis.

Comparative filarial susceptibility and biology between stock colony and selectively autogenous Aedes. togoi sub-colony were carried out to determine the laboratorial vector-capacity and viability of autogenous sub-colony. The results of susceptibility revealed that the selectively autogenous Ae. togoi sub-colony yielded higher susceptibility than the stock colony, ie Dirofilaria immitis: susceptibility rates=80.00% [Exp1(F8)] and 76.19% [Exp2(F17)] (autogenous sub-colony), 53.33% (Exp1) and 71.43% (Exp2) (stock colony); Brugia malayi: susceptibility rates=83.33% [Exp1(F17)] and 84.38% [Exp2(F19)] (autogenous sub-colony), 81.25% (Exp1) and 75.00% (Exp2) (stock colony), but not at the level of statistically significant differences except the Exp1 of D. immitis, which was significant difference. In addition, the average No. L3 per infected mosquito in the selective autogenous sub-colony (D. immitis: Exp1=3.37, Exp2=3.19; B. mallayi: Exp1=8.80, Exp2=3.37) was also higher than in stock colony (D. immitis: Exp1=2.44, Exp2=2.73; B. malayi: Exp1=7.85, Exp2=3.02), but not at the level of statistically significant difference. The results of comparisons on some biological aspects demonstrated that most of the cases they have similar biology except the average egg deposition per gravid female of stock colony (130.17+/-43.33) was significantly more than selectively autogenous sub-colony(F9) (94.33+/-13.69), egg length x width 575.62+/-18.06 microm x 186.15+/-9.35 microm of stock colony was significantly larger than selectively autogenous sub-colony(F9) 560.49+/-18.96 microm x 177.99+/-8.40 microm, and mean longevity of adult female of stock colony [41.60(6-61)] was significantly longer than selectively autogenous sub-colony(F9) [35.00(5-39)]. The selectively autogenous sub-colony was established and twenty-two successive generations have been colonized.

Dirofilariose pulmonar: relato de um caso / Pulmonary dirofilariasis: a case report

Os autores apresentam o caso de um paciente de 60 anos, sexo masculino, que após ter apresentado um episódio de dor torácica desenvolveu quadro de tosse e expectoraçäo. A radiografia simples de tórax mostrou um nódulo solitário em projeçäo do lobo superior direito, sem calcificaçäo, que persistiu inalterado após dez dias do desaparecimento dos sitnomas. Outros exames como tomografía computadorizada, teste de Mantoux, pesquisa de BAAR no escarro e broncoscopia näo acrescentaram nenhuma informaçäo, permenecendo o diagnótico anterior de foco pneumônico. A punçäo transparietal näo permitiu obter-se o diagnóstico definitivo. Foi, entäo, realizada toracotomia e o exame histopatológico do nódulo retirado revelou granuloma com necrose e larvas de Dirofilaria immitis. Os autores discutem os aspectos etiopatogênicos diagnósticos e terapêuticos desta rara afecçäo pulmonar