title: Identification and quantification of fungi and mycotoxins from Pu-erh tea.
abstract: Pu-erh tea originates from the province of Yunnan in south-western China. As this tea is produced by so called Aspergillus post-fermentation the question arises which molds and mycotoxins may be found in this tea. In total 36 samples of Pu-erh tea were investigated for their content of filamentous fungi and the mycotoxins aflatoxins B1, B2, G1, and G2, fumonisins B1, B2, and B3, and ochratoxin A. Fungi were isolated from all samples in a concentration of 1.0×10(1) to 2.6×10(6) colony forming units (cfu)/g tea, all together 19 fungal genera and 31 species were identified. The most prevalent species were Aspergillus acidus and Aspergillus fumigatus, followed by Zygomycetes and Penicillium species. Aflatoxins and fumonisins were not found in the samples investigated, ochratoxin A was detected in 4 of 36 teas (11.1%).
authors: Institute of Hygiene, Microbiology and Environmental Medicine, Medical University Graz, Graz, Austria.
authors: Doris
authors: D
authors: Haas
authors: Bettina
authors: B
authors: Pfeifer
authors: Christoph
authors: C
authors: Reiterich
authors: Regina
authors: R
authors: Partenheimer
authors: Bernhard
authors: B
authors: Reck
authors: Walter
authors: W
authors: Buzina
mesh_terms: D001230:Aspergillus / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D002681:China; D005285:Fermentation; D005658:Fungi / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology*; D008969:Molecular Sequence Data; D009183:Mycotoxins / Q000032:analysis*; D009793:Ochratoxins / Q000032:analysis; D013234:Stem Cells; D013662:Tea / Q000737:chemistry* / Q000382:microbiology*
chemical_list: D009183:Mycotoxins; D009793:Ochratoxins; D013662:Tea; C025589:ochratoxin A
keywords: Aflatoxin; Fumonisin; Fungi; Mycotoxins; Ochratoxin; Pu-erh tea