Listeria monocytogenes in milk and milk-based products

Mikrobiološka kakvoća sirovog mlijeka, svježeg kravljeg sira i vrhnja i kremastih kolača predstavlja značajan javnozdravstveni problem jer je riječ o rizičnoj skupini namirnica koje mogu biti izvor različitih uzročnika bolesti. Zbog izrazite opasnosti po ljudsko zdravlje, u ovom radu posebna pažnja posvećena je istraživanju prisutnosti bakterije Listeria monocytogenes u analiziranim proizvodima. U radu su korištene klasične mikrobiološke metode izolacije i identifikacije na selektivnim podlogama, a dobiveni rezultati su uspoređeni s rezultatima iz literature. Od ukupno 36 istraživanih uzoraka mlijeka i proizvoda na bazi mlijeka 6 (16,67%) uzoraka bilo je pozitivno na prisutnost bakterije Listeria monocytogenes, od čega po 10% otpada na sirovo mlijeko i svježi sir, čak 30 % na uzorke domaćeg vrhnja, a 16,67% na kremaste kolače.The microbiological quality of raw milk, homemade fresh cheese and sour cream and cream pie is a significant public health problem because it is a high-risk group of foods that can be a source of various pathogens. Because of the extreme danger to human health, in this paper, particular attention is devoted to the investigation of the presence of Listeria monocytogenes in the analyzed products. The paper used classical microbiological methods of isolation and identification on selective media, and the results were compared with results from the literature. Out of 36 examined samples of milk and milk-based products 6 (16.67%) samples were positive for the presence of Listeria monocytogenes, of which around 10% of raw milk and cheese, as much as 30% on domestic cream samples, and 16.67% on a cream cake