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Archives 2018
Myanmar Health Sciences Research Journal
Volume 30, Number 3
TITLE: Detection of Vibrio parahaemolyticus Contamination in Raw Oysters and Clams from Two Selected Markets in Yangon Region
AUTHOR: Kyi Kyi Nyein Win, Theingi Win Myat, Tin Tin Htwe, May Than Htay, Nilar, Myo Myo Kyaw, Mon Mon, Wah Win Htike & Thaung Hla
SOURCE: Myanmar Health Sciences Research Journal, Vol. 30, No. 3, 2018
ABSTRACT: Seafood is a nutrient-rich part of a healthful diet. All seafood are susceptible to surface or tissue contamination originating from the marine environment. Nowadays, oysters and clams consumption are popular in public together with increasing seafood-related illnesses in Myanmar. This cross-sectional, descriptive study was conducted to detect the occurrence of Vibrio parahaemolyticus in raw oysters and clams from 2 selected markets in Yangon Region. Oysters were collected from Sanchaung market and clams were collected from Lanmadaw market. Bacteriological identification was done by conventional culture method. Serological detection of O3:K6 serotype by slide agglutination procedure and antibiotic susceptibility test by disc diffusion method were carried out at Biological Toxicological Research Division. A total of 124 samples (60 oysters and 64 clams) were tested from January to August 2015. Out of 124 samples tested, Vibrio parahaemolyticus was isolated from 7 samples (5.6%), comprising 4 oysters (3.2%) and 3 clams (2.4%). All 3 isolates from clams were detected during summer months, one in March and two in May. The serological identification of pandemic O3:K6 serotype in isolated Vibrio parahaemolyticus was done but only 2 isolates showed agglutination with O3 antisera and no isolate showed agglutination with K6 antisera. It showed that identified serotype in this study was not the same as globally spreading serotype. Concerning the antibiotic susceptibility, all isolates were sensitive to norfloxacin, chloramphenicol,co-trimoxazole and doxycycline but all were resistant to ampicillin, 2 to gentamicin and one to cefotaxime. This study revealed that consumption of raw seafood can lead to some health hazards. Therefore, thorough cooking of shellfish and preventing raw seafood from cross-contaminating other foods should be considered as an effective measures for consumers to reduce risk.
SUBJECT HEADINGS: Vibrio parahaemolyticus, Oysters, Clams
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