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Published on: September 5, 2025
Moulds isolated from Istrian dried ham at the pre-ripening and ripening level
Giuseppe Comi1, Sandi Orlic, Sulejman Redzepovic
1Dipartimento di Scienze degli Alimenti, Facoltà di Agraria, Università degli Studi di Udine, Via Marangoni, 97, 33100 Udine, Italy. giuseppe.comi@dsa.uniud.it
Abstract:
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.
Insights
This study identified mould strains on Istrian ham, finding common species like Eurotium, Aspergillus, and Penicillium. Importantly, none of the isolated moulds produced mycotoxins, ensuring Istrian ham safety.
Area of Science:
- Food Microbiology
- Mycology
- Food Safety
Background:
- Istrian ham production involves specific pre-ripening and ripening phases.
- Mould growth on cured meat surfaces can impact quality and safety.
- Understanding the microflora is crucial for ensuring food safety.
Purpose of the Study:
- To identify mould strains present on Istrian ham during ripening.
- To assess the toxic potential of these isolated mould strains.
- To determine the health implications for consumers.
Main Methods:
- Isolation and identification of mould species from Istrian ham surfaces.
- Culturing moulds under simulated ripening conditions.
- Testing isolated strains for mycotoxin production.
Main Results:
- Five main mould genera were identified: Eurotium, Aspergillus, and Penicillium were predominant.
- Mould species remained consistent between pre-ripening and ripening phases.
- Mould presence and growth were influenced by ripening temperature and humidity.
- None of the tested mould isolates were found to produce mycotoxins.
Conclusions:
- Istrian ham microflora is primarily influenced by environmental contamination from air and ripening chambers.
- The identified mould strains do not pose a health risk due to a lack of mycotoxin production.
- Istrian ham is safe for consumption regarding mould-related mycotoxin hazards.
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