The aim of this study is to define the mould strains growing on the surface during the pre-ripening and the ripening phases of Istrian ham, and their toxic potential. The mould microflora was predominantly represented by five genera, which were isolated on the ham surfaces of three different producers investigated. The identified species were similar in the both tested periods, demonstrating that the contamination came mainly from the air and the ripening chambers (seasoning rooms), rather than the raw meat. Eurotium spp., Aspergillus spp. and Penicillium spp. were the main strains isolated. The presence and growth of the different strains depended on the temperature of ripening and the relative humidity in the ripening chambers, since the hams were home made products and not matured in controlled conditions. The toxic potential of isolated strains was also investigated. None of the tested moulds can produce mycotoxins and for this reason the Istrian hams do not represent a health hazard.
Copyright 2004 Elsevier B.V.