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Molecular characterization of Giardia duodenalis isolated from Semai Pahang Orang Asli (Peninsular Malaysia aborigines)

  • A. K. MOHAMMED MAHDY (a1) (a2), JOHARI SURIN (a1), A. MOHD-ADNAN (a3), K.-L. WAN (a3) and Y. A. L. LIM (a1)...


This study was conducted to determine the genotypes of Giardia duodenalis isolated from human faecal samples at Pos Betau, Pahang, Malaysia. Faecal specimens were collected and examined for G. duodenalis cysts using Trichrome staining techniques. Molecular identification was carried out by the amplification of a region of the small subunit of the nuclear ribosomal RNA (SSU rRNA) gene using nested PCR and subsequent sequencing. The sequences from 15 isolates from G. duodenalis were subjected to phylogenetic analysis (including appropriate outgroups) using the neighbor-joining and maximum parsimony methods. The trees identified G. duodenalis assemblages A and B, with a predominance of assemblage B. The predominance of anthroponotic genotypes indicates the possibility of anthroponotic transmission of these protozoa in this Semai Pahang Orang Asli community.


Corresponding author

*Corresponding author: Department of Parasitology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia. Tel: +603 7967 4746. Fax: +603 7967 4754. E-mail:


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Molecular characterization of Giardia duodenalis isolated from Semai Pahang Orang Asli (Peninsular Malaysia aborigines)

  • A. K. MOHAMMED MAHDY (a1) (a2), JOHARI SURIN (a1), A. MOHD-ADNAN (a3), K.-L. WAN (a3) and Y. A. L. LIM (a1)...


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