The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in Nigeria
The distribution of Anopheles gambiae and An. arabiensis across the ecological zones of Nigeria (arid savanna in the north gradually turns into humid forest in the south) was investigated. Results of the present study were compared to the distributions determined from samples of indoor-resting femal...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Fundação Oswaldo Cruz (FIOCRUZ)
2001-11-01
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| Series: | Memorias do Instituto Oswaldo Cruz |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762001000800009 |
| _version_ | 1797757006455504896 |
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| author | David Y Onyabe Jan E Conn |
| author_facet | David Y Onyabe Jan E Conn |
| author_sort | David Y Onyabe |
| collection | DOAJ |
| description | The distribution of Anopheles gambiae and An. arabiensis across the ecological zones of Nigeria (arid savanna in the north gradually turns into humid forest in the south) was investigated. Results of the present study were compared to the distributions determined from samples of indoor-resting females reported by an earlier study over 20 years ago. Larvae were sampled in the rainy seasons of 1997 and 1999 from 24 localities, 10 of which were sampled in both years. Specimens were identified by the polymerase chain reaction method. Results showed that species composition changed significantly among the 10 localities in both years (chi2=13.62, P = 0.0002), but this change was significant in only four of the 10 localities. The identity of the prevalent (more abundant) species changed between 1997 and 1999 in only three of 10 localities. An. arabiensis was prevalent in several localities in the southern Guinea savanna, an area where it was virtually absent over 20 years ago. The data suggest that An. arabiensis has extend its range, although differences in sampling technique (larval sampling versus adult collection) can not be ruled out as a possible explanation. |
| first_indexed | 2024-03-12T18:09:47Z |
| format | Article |
| id | doaj.art-e5015343abc541bcbbcf64d604aa2e15 |
| institution | Directory Open Access Journal |
| issn | 0074-0276 1678-8060 |
| language | English |
| last_indexed | 2024-03-12T18:09:47Z |
| publishDate | 2001-11-01 |
| publisher | Fundação Oswaldo Cruz (FIOCRUZ) |
| record_format | Article |
| series | Memorias do Instituto Oswaldo Cruz |
| spelling | doaj.art-e5015343abc541bcbbcf64d604aa2e152023-08-02T09:16:35ZengFundação Oswaldo Cruz (FIOCRUZ)Memorias do Instituto Oswaldo Cruz0074-02761678-80602001-11-019681081108410.1590/S0074-02762001000800009The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in NigeriaDavid Y OnyabeJan E ConnThe distribution of Anopheles gambiae and An. arabiensis across the ecological zones of Nigeria (arid savanna in the north gradually turns into humid forest in the south) was investigated. Results of the present study were compared to the distributions determined from samples of indoor-resting females reported by an earlier study over 20 years ago. Larvae were sampled in the rainy seasons of 1997 and 1999 from 24 localities, 10 of which were sampled in both years. Specimens were identified by the polymerase chain reaction method. Results showed that species composition changed significantly among the 10 localities in both years (chi2=13.62, P = 0.0002), but this change was significant in only four of the 10 localities. The identity of the prevalent (more abundant) species changed between 1997 and 1999 in only three of 10 localities. An. arabiensis was prevalent in several localities in the southern Guinea savanna, an area where it was virtually absent over 20 years ago. The data suggest that An. arabiensis has extend its range, although differences in sampling technique (larval sampling versus adult collection) can not be ruled out as a possible explanation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762001000800009Anopheles gambiaeAnopheles arabiensisdistributionforestsavannaNigeria |
| spellingShingle | David Y Onyabe Jan E Conn The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in Nigeria Memorias do Instituto Oswaldo Cruz Anopheles gambiae Anopheles arabiensis distribution forest savanna Nigeria |
| title | The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in Nigeria |
| title_full | The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in Nigeria |
| title_fullStr | The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in Nigeria |
| title_full_unstemmed | The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in Nigeria |
| title_short | The distribution of two major malaria vectors, Anopheles gambiae and Anopheles arabiensis, in Nigeria |
| title_sort | distribution of two major malaria vectors anopheles gambiae and anopheles arabiensis in nigeria |
| topic | Anopheles gambiae Anopheles arabiensis distribution forest savanna Nigeria |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762001000800009 |
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