Presence of Listeria monocytogenes at goats

Abstract

Listeriosis is the infectious disease of numerous mammals' species, including cattle, sheep, goat, pigs, and humans. Cause is Listeria monocytogenes, widespread in the nature and relatively resistant microorganism. Listeria come in environment by excretes of sick humans and animals as well as of clinically healthy organisms. This microorganism can be found in waste and water, soil, plants, feedstuffs, walls and floors of the buildings where live animals, various kinds of foods of plant and animal origin, as well as in animals and people. In goats, the disease is manifested in the form of abortion, encephalitis and septicemia. After infection, sometimes there are no clinical symptoms and goats come to the slaughterhouse as clinically healthy animals (latent infection). When the goats come to the slaughterhouse, it is n not necessary the transmission of the cause to meat, but it can be transferred to the equipment, walls, floors, aprons and boots. In our study, twenty clinically healthy goats, slaughtered in slaughterhouse, were tested - one hyperemic uterus and meat of all goats. Floor swabs (from nine different locations) and swabs from the carriage bottom (20 swabs) in which were placed intestines and uterus were taken three days after slaughter. Uterus and carriage swabs were tested according to method RES, chapter 2.10.14.B.1. and meat by ISO 11290 / 1:1996 (E). From the uterus, which was slightly hyperemic it was isolated Listeria monocytogenes and from five samples of floor and three samples of the carriages. It was not isolated from meat samples. These results indicate the possibility of indirect transmission of this bacterium to meat.Listerioza je infektivna bolest velikog broja sisara ukljucujuci goveda, ovce, koze i ljude. Uzrocnik oboljenja, Listeria monocytogenes je relativno rezistentna bakterija siroko rasprostranjena u prirodi gde dospeva sekretima klinicki obolelih ali i klinicki zdravih zivotinja. Nalazi se u vodi, zemlji, na biljkama, po zidovima, podovima objekata za drzanje zivotinja, u hrani zivotinjskog i biljnog porekla kao i kod ljudi i zivotinja. Kod koza, bolest se manifestuje abortusima, encefalitima i septikemijom. Po infekciji koza, klinicka slika ponekad izostaje tako da na klanje odlaze zivotinje sa latentnom infekcijom. Po klanju, nije nuzno da se infekt nadje u mesu ali zato kontaminira zidove, podove i opremu u klanicama. U nasoj studiji mikrobioloski je nakon klanja ispitano meso i uterusu 20 klinicki zdravih koza. Istovremeno, metodom briseva, ispitane su podne povrsine u klanici sa 9 mesta i kolica kojima se prenose unutrasnji organi. Brisevi su obradjivani metodom navedenom u RES, poglavlje 2.10.14.B.1. a meso metodama navedenim u ISO 11290 / 1:1996 (E). Iz jednog uterusa koji je bio hiperemican izolovana Listeria monocytogenes je kao i sa 5 uzoraka briseva poda i 3 brisa iz kolica. Listeria monocytogenes nije ustanovljena u uzorcima mesa. Ovi rezultati ukazuju na mogucnost indirektong prenosa Listeria monocytogenes na meso.