engleski

Survival of Francisella tularensis subsp. novicida in different samples of milk

Francisella tularensis is a gram-negative facultative intracellular bacterium that can cause a fatal disease, tularemia, in human and animals. This organism has been isolated from over 250 wildlife species, including fish, birds, amphibians, rabbits, squirrels, hares, voles, ticks, and flies. It resists harsh environments, and has been shown to survive in water and mud for more than a year. The bacterium is resistant to high temperatures of 42oC - 65oC after processing the water and food. Several epidemics of tularemia translated by milk has been reported in Europe. The aim of the study was to follow survival and replication of F. tularensis subsp. novicida in different milk samples: cow, goat, soy and chocolate by plate counting methods. Our results showed that F. tularensis subsp. novicida replicates in all milk samples during 10 days period. The highest CFU was measured in chocolated milk, while the fastest repliction rate was in soya milk.

F. tularensis; milk; replication; survival

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