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<p><i>Anopheles stephensi</i>, an invasive vector is aggressively expanding its geographic range across Africa, posing significant threat to malaria control. Surveillance of its spread is crucial for mitigating its impact on malaria transmission. Here, we report for the first time incursion of <i>An. stephensi</i> into Gayi, a rural area in southern Niger Republic. A combination of morphological identification, end point PCR and sequencing of fragments of <i>COXI</i> and <i>ITS2</i> genes confirmed <i>An. stephensi</i>. This species was found resting indoor together with other mosquitoes, including <i>An. coluzzii</i>, <i>An. gambiae</i> s.s., and <i>An. arabiensis</i>. Entomological parameters, including resting densities, human blood index and biting rate, <i>Plasmodium falciparum</i> parasite rate, and entomological inoculation rate were described for the above <i>Anopheles</i> species. The finding of <i>An. stephensi</i> sympatric with the above major malaria vectors in Niger highlights the urgent need for intensified surveillance to develop evidence-based approaches to prevent further spread of this pervasive vector.</p>

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First detection and entomological characterisation of invasive malaria vector Anopheles stephensi in sympatry with other vectors in Gayi Southern Niger Republic

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月2日

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  • Lamine M. Moustapha,
  • Abdoul-Nasser H. Sanda,
  • Muhammad M. Mukhtar,
  • Abdullahi Muhammad,
  • Hadizat K. Einoi,
  • Yusuf Y. Aliyu,
  • Shuaibu Adamu,
  • Tidjani M. Moudalabi,
  • Ibrahim Y. Lawali,
  • Al-hadji D. Moussa,
  • Hadiza Soumaila,
  • Eric Adehossi,
  • Maman L. Ibrahim,
  • Mahamadou Doutchi,
  • Sulaiman S. Ibrahim

摘要

Anopheles stephensi, an invasive vector is aggressively expanding its geographic range across Africa, posing significant threat to malaria control. Surveillance of its spread is crucial for mitigating its impact on malaria transmission. Here, we report for the first time incursion of An. stephensi into Gayi, a rural area in southern Niger Republic. A combination of morphological identification, end point PCR and sequencing of fragments of COXI and ITS2 genes confirmed An. stephensi. This species was found resting indoor together with other mosquitoes, including An. coluzzii, An. gambiae s.s., and An. arabiensis. Entomological parameters, including resting densities, human blood index and biting rate, Plasmodium falciparum parasite rate, and entomological inoculation rate were described for the above Anopheles species. The finding of An. stephensi sympatric with the above major malaria vectors in Niger highlights the urgent need for intensified surveillance to develop evidence-based approaches to prevent further spread of this pervasive vector.