Identification of Brugia Malayi in Vectors with a Species-Specific DNA Probe

Betty Kim Lee Sim Department of Tropical Public Health, Harvard School of Public Health, Boston, Massachusetts

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Joon Wah Mak Divisions of Filariasis and Malaria and Entomology, Institute for Medical Research, Kuala Lumpur, Malaysia

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Weng Hui Cheong Divisions of Filariasis and Malaria and Entomology, Institute for Medical Research, Kuala Lumpur, Malaysia

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Inge Sutanto Department of Parasitology, University of Indonesia, Jakarta, Indonesia

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Liliana Kurniawan National Institute of Health, Research and Development of the Ministry of Health, Jakarta, Indonesia

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Haryani A. Marwoto National Institute of Health, Research and Development of the Ministry of Health, Jakarta, Indonesia

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Eileen Franke United States Naval Medical Research Unit No. 2, Jakarta Detachment, Jakarta, Indonesia

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James R. Campell United States Naval Medical Research Unit No. 2, Jakarta Detachment, Jakarta, Indonesia

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Dyann F. Wirth Department of Tropical Public Health, Harvard School of Public Health, Boston, Massachusetts

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Willy F. Piessens Department of Tropical Public Health, Harvard School of Public Health, Boston, Massachusetts

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We evaluated the potential value of a cloned sequence of genomic DNA of Brugia malayi as a species-specific probe. Clone pBm 15 reacted with all stages of 8 different geographic isolates of B. malayi and cross-hybridized with microfilariae of B. timori. It did not hybridize with Wuchereria bancrofti or with B. pahangi, W. kalimantani, Dirofilaria repens, Breinlia booliati or Cardiofilaria species, animal filariids that can be sympatric with B. malayi. P32-labeled clone pBm 15 correctly identified mosquitoes infected even with 1 infective larva of B. malayi. This specific DNA probe should be an invaluable tool to monitor control programs of Brugian filariasis.

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