Quantification of sanitary-important bacteria (e.g. Enterobacteriaceae), as
well as indicators of environmental contamination, was assessed in samples
of cattle dung from 25 cattle farms in 15 north-eastern Slovakia districts
. The inhibitory effect of crude bacteriocin extract CBE V24 from Enterococ
cus faecalis V24 against Listeria monocytogenes Ohio and Yersinia enterocol
itica YE85 was examined in cattle dung water with the aim of finding a new
way of eliminating the health risk of the animal slurry. The following bact
erial groups were quantified: Salmonella spp., Shigella-like spp., Proteus
spp., Enterobacter spp., Citrobacter spp., Pseudomonas spp., Escherichia co
li, Listeria spp., staphylococci, streptococci and enterococci (the average
count ranged from 10(2) up to 10(4) cfu ml(-1)). Antagonistic effect of th
e crude bacteriocin from Enterococcus faecalis V24 in the range of 100-600
Arbitrary units per ml (AU ml(-1)) was shown against the following bacteria
: Enterobacter cloacae, Ent. asburiae, Proteus spp., Salmonella spp., Acine
tobacter lwoffi, L. monocytogenes as well as Y. enterocolitica YE85. During
tests performed to study the inhibitory effect of the crude bacteriocin CB
E V24 (concentration 800, 1600 AU ml(-1)) against L. monocytogenes Ohio and
Y. enterocolitica YE85 in experimentally contaminated cattle dung, a reduc
tion of 2.03 and 1.44 log cfu ml(-1), respectively, was already noted after
1 h after crude bacteriocin CBE V24 addition.