ABSTRACT
Achatina fulica snails cause environmental problems and represent a public health hazard since it is a host in the life cycles of various parasites, among them, Angiostrongylus cantonensis and, less frequently, Ancylostoma caninum. We report the occurrence of Angistrongylus cantonensis, as well as the unexpected finding of Ancylostoma caninum, in a total of 936 specimens of Achatina fulica snails from different regions of São Paulo city, Brazil. Samples were divided into 492 pools which were screened for nematodes. If present, larvae were submitted to DNA extraction and PCR protocol targeting, the ITS-2 gene junction. From the 183 positive pools for larvae presence, 97 showed specific 650 bp band at electrophoresis and 21 presented bands nearly 300 bp. Two amplicons from each size were and sequenced. A BLAST/n of 650 bp sequences presented identity with Angistrongylus cantonensis, while the two of 300 bp, showed identity with Ancylostoma caninum, also supported by phylogenetic analysis. This is the second report of Ancylostoma caninum found in these snails in the world, therefore, this study allows a better understanding about these diseases and highlights the need of continue systematically mapping sites that can be infested with the mollusc.
Achatina fulica snails cause environmental problems and represent a public health hazard since it is a host in the life cycles of various parasites, among them, Angiostrongylus cantonensis and, less frequently, Ancylostoma caninum. We report the occurrence of Angistrongylus cantonensis, as well as the unexpected finding of Ancylostoma caninum, in a total of 936 specimens of Achatina fulica snails from different regions of São Paulo city, Brazil. Samples were divided into 492 pools which were screened for nematodes. If present, larvae were submitted to DNA extraction and PCR protocol targeting, the ITS-2 gene junction. From the 183 positive pools for larvae presence, 97 showed specific 650 bp band at electrophoresis and 21 presented bands nearly 300 bp. Two amplicons from each size were and sequenced. A BLAST/n of 650 bp sequences presented identity with Angistrongylus cantonensis, while the two of 300 bp, showed identity with Ancylostoma caninum, also supported by phylogenetic analysis. This is the second report of Ancylostoma caninum found in these snails in the world, therefore, this study allows a better understanding about these diseases and highlights the need of continue systematically mapping sites that can be infested with the mollusc.
ABSTRACT
Achatina fulica snails cause environmental problems and represent a public health hazard since it is a host in the life cycles of various parasites, among them, Angiostrongylus cantonensis and, less frequently, Ancylostoma caninum. We report the occurrence of Angistrongylus cantonensis, as well as the unexpected finding of Ancylostoma caninum, in a total of 936 specimens of Achatina fulica snails from different regions of São Paulo city, Brazil. Samples were divided into 492 pools which were screened for nematodes. If present, larvae were submitted to DNA extraction and PCR protocol targeting, the ITS-2 gene junction. From the 183 positive pools for larvae presence, 97 showed specific 650 bp band at electrophoresis and 21 presented bands nearly 300 bp. Two amplicons from each size were and sequenced. A BLAST/n of 650 bp sequences presented identity with Angistrongylus cantonensis, while the two of 300 bp, showed identity with Ancylostoma caninum, also supported by phylogenetic analysis. This is the second report of Ancylostoma caninum found in these snails in the world, therefore, this study allows a better understanding about these diseases and highlights the need of continue systematically mapping sites that can be infested with the mollusc.(AU)
Os caramujos Achatina fulica causam problemas ambientais e representam um perigo em Saúde Pública uma vez que são hospedeiros de vários parasitas, entre eles o Angiostrongylus cantonensis e menos frequentemente o Ancylostoma caninum. Nós relatamos a ocorrência de Angistrongylus cantonensis, bem como o achado de Ancylostoma caninum, a partir de 936 espécimens de caramujos Achatina fulica de diferentes regiões da cidade de São Paulo, Brasil. Amostras foram divididas em 492 pools os quais foram triados para nematóides. Se presentes, larvas foram submetidas a extração de DNA e um protocolo de PCR tendo como alvo a junção do gene ITS-2. De 183 pools contendo larvas, 97 apresentaram bandas específicas de 650 pb e na eletroforese 21 apresentaram bandas próximas aos 300 pb. Dois amplicons de cada tamanho foram sequenciados. A submissão ao BLAST/n das sequências de 650 pb apresentaram identidade das sequências com Angistrongylus cantonensis, enquanto que as duas de 300 pb apresentaram identidade com Ancylostoma caninum, também corroboradas por análises filogenéticas. Este é o segundo relato do encontro de Ancylostoma caninum nestes caramujos no mundo, sendo assim, este estudo permite um melhor entendimento destas doenças e denota a necessidade de contínuo monitoramento de regiões que estejam infestadas pelo molusco.(AU)
Subject(s)
Animals , Snails/parasitology , Snails/pathogenicity , Angiostrongylus cantonensis/isolation & purification , Ancylostoma/isolation & purification , Introduced Species/statistics & numerical dataABSTRACT
Achatina fulica snails cause environmental problems and represent a public health hazard since it is a host in the life cycles of various parasites, among them, Angiostrongylus cantonensis and, less frequently, Ancylostoma caninum. We report the occurrence of Angistrongylus cantonensis, as well as the unexpected finding of Ancylostoma caninum, in a total of 936 specimens of Achatina fulica snails from different regions of São Paulo city, Brazil. Samples were divided into 492 pools which were screened for nematodes. If present, larvae were submitted to DNA extraction and PCR protocol targeting, the ITS-2 gene junction. From the 183 positive pools for larvae presence, 97 showed specific 650 bp band at electrophoresis and 21 presented bands nearly 300 bp. Two amplicons from each size were and sequenced. A BLAST/n of 650 bp sequences presented identity with Angistrongylus cantonensis, while the two of 300 bp, showed identity with Ancylostoma caninum, also supported by phylogenetic analysis. This is the second report of Ancylostoma caninum found in these snails in the world, therefore, this study allows a better understanding about these diseases and highlights the need of continue systematically mapping sites that can be infested with the mollusc.
Os caramujos Achatina fulica causam problemas ambientais e representam um perigo em Saúde Pública uma vez que são hospedeiros de vários parasitas, entre eles o Angiostrongylus cantonensis e menos frequentemente o Ancylostoma caninum. Nós relatamos a ocorrência de Angistrongylus cantonensis, bem como o achado de Ancylostoma caninum, a partir de 936 espécimens de caramujos Achatina fulica de diferentes regiões da cidade de São Paulo, Brasil. Amostras foram divididas em 492 pools os quais foram triados para nematóides. Se presentes, larvas foram submetidas a extração de DNA e um protocolo de PCR tendo como alvo a junção do gene ITS-2. De 183 pools contendo larvas, 97 apresentaram bandas específicas de 650 pb e na eletroforese 21 apresentaram bandas próximas aos 300 pb. Dois amplicons de cada tamanho foram sequenciados. A submissão ao BLAST/n das sequências de 650 pb apresentaram identidade das sequências com Angistrongylus cantonensis, enquanto que as duas de 300 pb apresentaram identidade com Ancylostoma caninum, também corroboradas por análises filogenéticas. Este é o segundo relato do encontro de Ancylostoma caninum nestes caramujos no mundo, sendo assim, este estudo permite um melhor entendimento destas doenças e denota a necessidade de contínuo monitoramento de regiões que estejam infestadas pelo molusco.