Frequency and characteristics of Listeria spp. in minced meat in Albanian retail market


1Agricultural University, Kamez, Albania
2Food Safety and Veterinary Institute, Str. Aleksandër Moisiu nr. 82 Tirana

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Listeriosis is the emerging bacterial zoonotic infections worldwide. Among the species of the genus ListeriaListeria monocytogens is known as causative agent of humans and animals listeriosis. Information on the occurrence of Listeria monocytogenes and Listeria species is limited in the veterinary and public health sectors in Albania. The studies for Listeria spp. in the food in Albania belongs to the last ten years. This survey was conducted determinate the incidence of Listeria spp. in minced meat samples, collected from retail shops and supermarkets in Tirana. A total of 240 samples of raw minced meat (beef, pork and pork-beef mixed) were collected over 2010-2011 period, analyzed for the presence of Listeria spp. The standard techniques (ISO 11290-1, 2004 ) were employed for the isolation and identification of Listeria species, as well as biochemical identification system API-Listeria. Out of the total of 240 samples examined, 152 (63.3%) were found to be positive for Listeria sppListeria it was isolated during all year. Listeria monocytogenes was isolated in 72 (30%), Listeria innocua in 112 (46,6%), Listeria seeligeri in 8 (3.2%), Listeria gray in 4 (1.6%) of the analyzed samples. 28 (11.6%) out of total 240 samples showed a mixed contamination of the two, three species Listeria. This study indicated the high incidence rate of L. monocytogenes and other Listeria species in retail minced meat of the Tirana market. This highlights the possibility of Listeria spp or L.monocytogenes to persist in not cooked well minced meat preparation and raises the problem of illness for the public..

Keywords: raw minced meat, retail market, Listeria spp.Listeria monocytogenes, Tirana market, Albania.

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