บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Current knowledge of fungi and mycotoxins associated with food commodities in Southeast Asia.

Pitt, J. I.; Hocking, A. D.;

ACIAR Technical Reports Series Year: 1996 Issue: No. 37 Pages: 5-10 Ref: 11 ref.

1996

บทคัดย่อ

Current knowledge of fungi and mycotoxins associated with food commodities in Southeast Asia.

An overview of results of a 5-yr study on the occurrence of fungi and mycotoxins in all major food commodities traded in Thailand, Indonesia and the Philippines is presented. Over 1700 samples were examined, including maize, groundnuts, rice, soyabeans, mung beans, sorghum, cashews, spices and herbs. Samples were collected randomly from farm storage, middlemen and retail shops, to follow the time course of infection. Fungi were detected and enumerated by direct plating on Dichloran Rose Bengal Chloramphenicol agar and Dichloran 18% Glycerol agar after surface disinfection in 10% chlorine solution. Over 35 000 fungi were isolated and identified. The major fungi found in maize were Aspergillus flavus and Fusarium moniliforme [Gibberella fujikuroi]. In groundnuts, the predominant fungi were A. flavus and A. niger. The most common Fusarium spp. were F. semitectum [F. pallidoroseum] and F. equiseti; Penicillium citrinum and Eurotium spp. were also frequently isolated. Infections in rice and beans wer

e dominated by field fungi. In paddy rice, Trichoconiella padwickii [Alternaria padwickii] was most commonly encountered. The dominant Fusarium spp. was F. pallidoroseum; Aspergillus spp., including A. flavus, were less common. Polished rice was practically free of fungi, presumably due to the heat generated during the dehulling process. Infection levels in most bean samples were low. F. pallidoroseum was the species most commonly isolated from mung beans, while higher levels of A. flavus were found in soyabeans than other beans. Selected samples were assayed for aflatoxins. High levels were often found in maize and groundnuts. The potential for production of fumonisins in maize due to the high presence of G. fujikuroi is discussed.