Desenvolvimento biológico de Angiostrongylus vasorum (Baillet) Kamensnky (Nematoda, Angiostrongylidae) em Subulina octona Bruguière (Molusca, Subulinidae) em condições de laboratório

Abstract

ABSTRACT. Biological developrnent of Angiostrongylus vasorum (Baillet) Karnensky (Nematoda, Metastrongylidae) in Subulina octona Bruguiere (Mollusca, Subulinidae) in laboratory conditions. With the purpose of investigating the biological aspects of Angiostrongy/us vasorum (Baillet, 1866) Kamensky, 1905 in Subu/ina octona Bruguiere, 1789 experimental infections were carried out with the exposure of 90 adult molluscs to 155 LI ofthe parasite/mollusc during 24 hours. The intramolluscan larval development was checked out daily through the chemical digestion offour infected molluscs and one molluscs from the control group dW'ing 21 days after infection. Until the 6 th day post-infection, only LI ofthe parasite has been observed.On the 7 th day; the presence of L2 was detected and from the 13 th day on, L3 of A.vasorum also appeared. By means of larval morphometry, it has been observed that, LI had na average size of335 x 14,5 um whereas L2 had an average size of440,7 x 33,9 um on the i h day ofter infection, reaching a, aximal diameter of 41,8 um on the 12 th day after infections. The L3 had an average size of 472,4 x 38,7 um on the 13 th day day and on the 21 st day after infection the measure was 551 ,3 x 27,6 um. ln order to verifY the infectivity ofL3 , from S. octona to the detinitive host, infection of a dog was undertaken by means of ingestion oftritured molluscs. On the 49 th day post-infection, L I was found in the feaces of the dog and at necropsy on the 84 th day post-infection adults worms were found in the lungs. KEY WORDS . Angiostrongy/us vasorUI11 , Subu/ina octona, intra-mollusc larvae evolutionEntre os helmintos que ocorrem no Brasil, observa-se Angiostrongylus vasorurn (Baillet, 1866) Kamensky, 1905, um nematóide que parasita artérias pulmonares e suas ramificações, ventrículo, átrio e aurícula direita de cães domésticos e carnívoros silvestres.

Occurrence of Aelurostrongylus abstrusus (Railliet, 1898) larvae (Nematoda: Metastrongylidae) infecting Achatina (Lissachatina) fulica Bowdich, 1822 (Mollusca: Gastropoda) in the Amazon region

“…The veterinary importance of A. fulica, participating in the biological cycles in the wild and domestic fauna in Brazil, has been reported in several works undertaken by various authors (Bessa et al 2000;Thiengo et al 2007;Thiengo et al 2008;Oliveira et al 2010;Pereira 2010). Achatina fulica is frequently infected with larvae of A. abstrusus, Rhabditis sp., Strongyluris sp.…”

“…Achatina fulica is frequently infected with larvae of A. abstrusus, Rhabditis sp., Strongyluris sp. and Angiostrongylus vasorum (Baillet 1866) (Bessa et al 2000).…”

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

“…Subulina octona (Bruguière 1789) (Subulinidae) is a land snail widely distributed in Brazil with medical and veterinary importance due to its participation as intermediate host in the life cycle of helminths such as Platynossomun illiciens (Braum, 1901) (Digenea, Dicrocoeliidae) and Aelurostrongylus abstrusus (Railliet, 1898) (Nematoda, Angiostrongylidae) parasites of the domestic cat (Ash 1962, Maldonado 1945, Postharmostomum gallinum (Witenberg, 1923) (Digenea, Brachylaimidae) and Paratanaisia bragai (Santos, 1934) (Digenea, Eucotylidae) which are parasites of birds (Alicata 1940, Maldonado 1945, Angiostrongylus vasorum (Baillet 1866) (Kamensky 1905) (Nematoda, Angiostrongylidae) which is a parasite of canids (Bessa et al 2000), Angiostrongylus cantonensis (Chen, 1935) (Angiostrongylidae), parasite of rodents and humans (Andersen et al 1986). This species is usually found at damp and shaded places such as gardens and vegetable gardens (Aráujo and Bessa 1993).…”

The influence of caffeine and thymol on the survival, growth and reproduction of Subulina octona (Brugüière, 1789) (Mollusca, Subulinidae)

“…It is referred as an intermediate host in the life cycle of Platynosomum illiciens (Braum, 1901) (Digenea, Dicrocoeliidae) (Maldonado, 1945) and of Aelurostrongylus abstrusus (Railliet, 1898) (Nematoda, Angiostrongylidae) (Ash, 1962), both parasites of the domestic cat. It has also been cited as an intermediate host of Tanaisia bragai (Santos, 1934) (Digenea, Eucotylidae) (Maldonado, 1945;Brandolini, 1997), Postharmostomum gallium Witenberg, 1923 (Digenea, Brachylaimidae) (Alicata, 1940;Duarte, 1980), Davainea proglottina (Davaine, 1860) (Cestoda, Davaineidae) (Van Volkenberg, 1937in Maldonado, 1945, all of which are parasites of birds and of Angiostrongylus vasorum (Baillet, 1866) Kamensky, 1905 (Nematoda, Angiostrongylidae), which is a parasite of canids (Bessa et al, 2000). Due to the high cost and danger in the use of toxic products to combat the snails, the molluscicidal substances that have vegetable origin can be a safe way of controlling these animals.…”