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Mansor SM, Haninah UA, Lacroix R, Angamuthu C, Ravindran T, Seshadri VS, Sekaran DS, Lee HL, Murad S, Nam WS, Alphey L, Nazni WA. Similar vertical transmission rates of dengue and chikungunya viruses in a transgenic and a non-transformed Aedes aegypti (L.) laboratory strain. Trop Biomed 2016; 33:120-134. [PMID: 33579149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The increase of the burden of dengue and chikungunya and the relative failure of traditional vector control strategies have highlighted the need to develop new control methods. RIDL-SIT, a vector control method based on the release of engineered male mosquitoes, has shown promising results from field trials conducted in the Cayman Islands and Brazil. In large scale use, a small proportion of females might be released along with the males. Such females are potential virus vectors; here we investigate the vertical transmission of dengue and chikungunya of homozygous OX513A females.We provided females of OX513A-My1 and a wild type comparator strain with blood meals artificially infected with dengue serotype 1, 2, 3, 4 or chikungunya viruses. For 14 days post-feeding, eggs laid by females were collected. Larvae and their mothers were first tested by qRT-PCR, then by inoculation on cell cultures to search for infectious viral particles. We found no significant difference between the minimum infection rate of OX513A-My1 and wild type females. We also discussed the potential number of females being released, a fraction of the female wild population. Consequently, we conclude that there are no evidence that OX513A-My females, if released into the environment, would cause more harm than their wild counterparts.
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Affiliation(s)
- S M Mansor
- Medical Entomology Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia
- Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak D.R., Malaysia
| | - Ummu A Haninah
- Medical Entomology Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia
| | - R Lacroix
- Oxitec Ltd., 71 Innovation Drive, Abingdon, OX14 4RQ, United Kingdom
| | - C Angamuthu
- Medical Entomology Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia
- Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak D.R., Malaysia
| | - T Ravindran
- Virology Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Wilayah Persekutuan, Malaysia
| | - Vasan S Seshadri
- Oxitec Ltd., 71 Innovation Drive, Abingdon, OX14 4RQ, United Kingdom
- Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Department of Preventive and Social Medicine, Puducherry, 605 006, India
| | - Devi Shamala Sekaran
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Wilayah Persekutuan, Malaysia
| | - H L Lee
- Medical Entomology Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia
| | - S Murad
- Medical Entomology Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia
| | - W S Nam
- Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak D.R., Malaysia
| | - L Alphey
- Oxitec Ltd., 71 Innovation Drive, Abingdon, OX14 4RQ, United Kingdom
- Department of Zoology, University of Oxford, The Tinbergen Building, South Parks Road, Oxford, OX1 3PS, United Kingdom
| | - W A Nazni
- Medical Entomology Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia
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