da Silva M C, Hofer E, Tibana A
Departamento de Nutrição, Universidade Federal de Alagoas, Maceió, RJ, Brazil.
J Food Prot. 1998 Mar;61(3):354-6. doi: 10.4315/0362-028x-61.3.354.
The present study evaluated the incidence of Listeria spp. in some Brazilian cheeses obtained from retail stores in Rio de Janeiro, Of 103 samples of various types of cheese examined as recommended in the Listeria isolation protocol of the Health Protection Branch of Canada, 11 (10.68%) were contaminated by Listeria monocytogenes, 13 (12.62%) by Listeria innocua, 6 (5.83%) by Listeria grayi, and 1 (0.97%) by Listeria welshimeri. A higher incidence of L. monocytogenes as observed mainly in the homemade Minas Frescal cheeses (a Brazilian soft white cheese, eaten fresh), 7 of 17 (41.17%), followed by ripened cheeses, 3 of 53 (5.67%), and industrially manufactured Frescal (Minas and Ricotta) cheeses, 1 of 33 (3.03%). Three serotypes (1/2a, 1/2b and 4b) were observed among the strains of L. monocytogenes isolated, all of them being frequently involved in outbreaks of foodborne listeriosis and sporadic cases of the disease all over the world.
本研究评估了从里约热内卢零售店获取的一些巴西奶酪中李斯特菌属的发生率。按照加拿大卫生保护局李斯特菌分离规程的建议，对103份不同类型的奶酪样本进行检测，其中11份（10.68%）被产单核细胞李斯特菌污染，13份（12.62%）被无害李斯特菌污染，6份（5.83%）被格氏李斯特菌污染，1份（0.97%）被威氏李斯特菌污染。产单核细胞李斯特菌的发生率较高，主要见于自制的米纳斯弗雷斯科奶酪（一种巴西软质白奶酪，新鲜食用），17份中有7份（41.17%），其次是成熟奶酪，53份中有3份（5.67%），以及工业生产的弗雷斯科奶酪（米纳斯和意大利乳清干酪），33份中有1份（3.03%）。在分离出的产单核细胞李斯特菌菌株中观察到三种血清型（1/2a、1/2b和4b），它们在世界各地的食源性李斯特菌病暴发和散发病例中均经常出现。
