Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern Brazil
Populations of Anopheles (Kerteszia) were sampled fortnightly over a one-year period (August 1991 to July 1992) at Ribeira Valley, S. Paulo State, Brazil. Indoor and outdoor collections were made on human bait at evening crepuscular period. The Polovodova technique for age grading was applied to 3,5...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
1993-01-01
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| Series: | Revista de Saúde Pública |
| Subjects: | |
| Online Access: | http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0034-89101993000100001 |
| _version_ | 1818610266029424640 |
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| author | Forattini Oswaldo Paulo Kakitani Iná Massad Eduardo Gomes Almério de Castro |
| author_facet | Forattini Oswaldo Paulo Kakitani Iná Massad Eduardo Gomes Almério de Castro |
| author_sort | Forattini Oswaldo Paulo |
| collection | DOAJ |
| description | Populations of Anopheles (Kerteszia) were sampled fortnightly over a one-year period (August 1991 to July 1992) at Ribeira Valley, S. Paulo State, Brazil. Indoor and outdoor collections were made on human bait at evening crepuscular period. The Polovodova technique for age grading was applied to 3,501 females of Anopheles cruzii and to 416 females of An. bellator. That sample represented 34.4% of the total number of mosquitoes collected. The most abundant species found was An. cruzii. However, An. bellator showed an endophagy that was almost three times greater than that of An. cruzii. The overall parous rate was 25.4% and uniparity was practically dominant one. A proportion of 26.9% of An. cruzii and 12.0% of An. bellator were found to be uniparous. Only three outdoor females of the former species (0.1%) showed biparity. Parity of An. cruzii was higher in females caught outdoors than in those caught indoors. Nevertheless, 497 nulliparous females examined (417 cruzii and 80 bellator) had ovaries that had advanced to Christophers and Mer stages III to V. These results imply that these females had already practised hematophagy. Relating these results to those from the parous females, a high statistical significance was found, leading to the conclusion that gonothophic discordance is a common pattern among these anophelines. Further, these results obtained with human bait catches strongly suggest that nearly 38.0% of these host-seeking females had already taken at least one previous blood-meal. So it is possible that enough time could thus be available for the plasmodian development in the vectors. |
| first_indexed | 2024-12-16T15:11:42Z |
| format | Article |
| id | doaj.art-a7261468ea354c38a794b2e70d2e96c8 |
| institution | Directory Open Access Journal |
| issn | 0034-8910 1518-8787 |
| language | English |
| last_indexed | 2024-12-16T15:11:42Z |
| publishDate | 1993-01-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Revista de Saúde Pública |
| spelling | doaj.art-a7261468ea354c38a794b2e70d2e96c82022-12-21T22:26:57ZengUniversidade de São PauloRevista de Saúde Pública0034-89101518-87871993-01-0127118Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern BrazilForattini Oswaldo PauloKakitani InáMassad EduardoGomes Almério de CastroPopulations of Anopheles (Kerteszia) were sampled fortnightly over a one-year period (August 1991 to July 1992) at Ribeira Valley, S. Paulo State, Brazil. Indoor and outdoor collections were made on human bait at evening crepuscular period. The Polovodova technique for age grading was applied to 3,501 females of Anopheles cruzii and to 416 females of An. bellator. That sample represented 34.4% of the total number of mosquitoes collected. The most abundant species found was An. cruzii. However, An. bellator showed an endophagy that was almost three times greater than that of An. cruzii. The overall parous rate was 25.4% and uniparity was practically dominant one. A proportion of 26.9% of An. cruzii and 12.0% of An. bellator were found to be uniparous. Only three outdoor females of the former species (0.1%) showed biparity. Parity of An. cruzii was higher in females caught outdoors than in those caught indoors. Nevertheless, 497 nulliparous females examined (417 cruzii and 80 bellator) had ovaries that had advanced to Christophers and Mer stages III to V. These results imply that these females had already practised hematophagy. Relating these results to those from the parous females, a high statistical significance was found, leading to the conclusion that gonothophic discordance is a common pattern among these anophelines. Further, these results obtained with human bait catches strongly suggest that nearly 38.0% of these host-seeking females had already taken at least one previous blood-meal. So it is possible that enough time could thus be available for the plasmodian development in the vectors.http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0034-89101993000100001Anopheles/physiologyParityEndophagyDomiciliation |
| spellingShingle | Forattini Oswaldo Paulo Kakitani Iná Massad Eduardo Gomes Almério de Castro Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern Brazil Revista de Saúde Pública Anopheles/physiology Parity Endophagy Domiciliation |
| title | Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern Brazil |
| title_full | Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern Brazil |
| title_fullStr | Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern Brazil |
| title_full_unstemmed | Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern Brazil |
| title_short | Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 1- Parity of blood seeking Anopheles (Kerteszia) in South-Eastern Brazil |
| title_sort | studies on mosquitoes diptera culicidae and anthropic environment 1 parity of blood seeking anopheles kerteszia in south eastern brazil |
| topic | Anopheles/physiology Parity Endophagy Domiciliation |
| url | http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0034-89101993000100001 |
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