Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results
Considering the possibility of introduction of schistosomiasis mansoni into Argentina as a consequence of dam construction on the Rio De La Plata basin, preliminary studies have been carried out on agrosystems such as ricefields in Corrientes province with the following purposes: 1) to survey and es...
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| Format: | Article |
| Language: | English |
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Fundação Oswaldo Cruz (FIOCRUZ)
1990-09-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761990000300009 |
| _version_ | 1827845071888711680 |
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| author | Alejandra Rumi Monika Ines Hamann |
| author_facet | Alejandra Rumi Monika Ines Hamann |
| author_sort | Alejandra Rumi |
| collection | DOAJ |
| description | Considering the possibility of introduction of schistosomiasis mansoni into Argentina as a consequence of dam construction on the Rio De La Plata basin, preliminary studies have been carried out on agrosystems such as ricefields in Corrientes province with the following purposes: 1) to survey and estimate the relative abundance of planorbids and identify potential vector species; 2) to identify environmental factors capable of influencing Biomphalaria population dynamics; and 3) to find out snail-parasite associations and estimate snail infection rates in order to detect possible competitive interactions between larval stages of native trematodes that could be used in biological control of Schistosoma mansoni. Three potential schistosome vectors were detected in ricefields, namely Biomphalaria straminea, B. tenagophila and B. peregrina, although B. orbignyi, a species refractory to infection with S. mansoni, proved the most frequent and abundant. Positive correlations (P<0.05) were found between Biomphalaria abundance and some environmental parameters: conductivity, hardness, calcium, nitrites plus nitrates, ammonium and bicarbonates. Water temperature correlation was negative (P<0.05). No correlation (P>0.05) was found in total iron, phosphates (SRP), pH and soil granulometry. Echinocercariae developed from rediae and belonging to Petasiger sp., Paryphostomum sp., and other undetermined species were found. |
| first_indexed | 2024-03-12T08:52:14Z |
| format | Article |
| id | doaj.art-bf39699da0bf444692e9a84de103c077 |
| institution | Directory Open Access Journal |
| issn | 0074-0276 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T08:52:14Z |
| publishDate | 1990-09-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-bf39699da0bf444692e9a84de103c0772023-09-02T16:17:44ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz0074-02761678-80601990-09-0185332132810.1590/S0074-02761990000300009Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary resultsAlejandra RumiMonika Ines HamannConsidering the possibility of introduction of schistosomiasis mansoni into Argentina as a consequence of dam construction on the Rio De La Plata basin, preliminary studies have been carried out on agrosystems such as ricefields in Corrientes province with the following purposes: 1) to survey and estimate the relative abundance of planorbids and identify potential vector species; 2) to identify environmental factors capable of influencing Biomphalaria population dynamics; and 3) to find out snail-parasite associations and estimate snail infection rates in order to detect possible competitive interactions between larval stages of native trematodes that could be used in biological control of Schistosoma mansoni. Three potential schistosome vectors were detected in ricefields, namely Biomphalaria straminea, B. tenagophila and B. peregrina, although B. orbignyi, a species refractory to infection with S. mansoni, proved the most frequent and abundant. Positive correlations (P<0.05) were found between Biomphalaria abundance and some environmental parameters: conductivity, hardness, calcium, nitrites plus nitrates, ammonium and bicarbonates. Water temperature correlation was negative (P<0.05). No correlation (P>0.05) was found in total iron, phosphates (SRP), pH and soil granulometry. Echinocercariae developed from rediae and belonging to Petasiger sp., Paryphostomum sp., and other undetermined species were found.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761990000300009Planorbidaeschistosome vectorsricefieldsecology |
| spellingShingle | Alejandra Rumi Monika Ines Hamann Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results Memorias do Instituto Oswaldo Cruz Planorbidae schistosome vectors ricefields ecology |
| title | Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results |
| title_full | Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results |
| title_fullStr | Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results |
| title_full_unstemmed | Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results |
| title_short | Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results |
| title_sort | potential schistosome vector snails and associated trematodes in ricefields of corrients province argentina preliminary results |
| topic | Planorbidae schistosome vectors ricefields ecology |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761990000300009 |
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