Microbial and chemical properties of Cambodian traditional fermented fish products.
BACKGROUND
Fermented fish products, commonly consumed in south-east Asia, are used as condiments that contribute to people's nutritional sources and as seasonings to improve food taste and flavour. Among these, the Cambodian products prahok (fish paste), kapi (shrimp paste) and toeuk trey (fish sauce) have not been examined in detail. This is the first study to investigate their chemical and microbial properties.


RESULTS
Acetic acid was the most common organic acid with the highest concentration in 10/13 samples (1.9-26.6 g kg(-1)). Lactic acid was also found at high concentrations (0.4-12.9 g kg(-1)). 16S ribosomal RNA gene-dependent phylogenetic analyses indicated that Gram-positive cocci and rods, such as Bacillus, Clostridium, Staphylococcus and Tetragenococcus, were the major microbial populations. High sodium chloride concentrations detected in these products (170-270 g kg(-1)) could be responsible for inhibition of the growth of Gram-negative putrefactive microorganisms.


CONCLUSION
This study established a relationship between the chemical and microbial compositions of Cambodian fermented fish products, which provides a basis for preservation and maturation. These data could be beneficial in the manufacturing of these products in terms of microbial control and quality stabilisation.
['Chuon|Mony R|MR|', 'Shiomoto|Mimoe|M|', 'Koyanagi|Takashi|T|', 'Sasaki|Tetsuya|T|', 'Michihata|Toshihide|T|', 'Chan|Sarun|S|', 'Mao|Sopheareth|S|', 'Enomoto|Toshiki|T|']
D019342:Acetic Acid D000818:Animals D001419:Bacteria D002160:Cambodia D004032:Diet D005285:Fermentation D005396:Fish Products D005421:Flavoring Agents D005516:Food Microbiology D006801:Humans D019344:Lactic Acid D012336:RNA, Ribosomal, 16S D012758:Shellfish D012965:Sodium Chloride
fermented fish products fish paste fish sauce organic acid microbiota