RESULTS AND DISCUSSION
The reduction of E.coli (difference 1.3 log10 CFU/g) was noted at day 7 in EG2 (1 week of the PPB
CCM4231 application) as well as the reduction of Clostridium-like sp. (difference 1.57 log10 CFU/g)
at day 42 (3 weeks of PPB CCM4231 cessation) in comparison to CG. Reductive effect against
Pseudomonas-like sp. (P<0.001) was also noted in EG3 (the combination PPB CCM4231 with sage) at
day 42 in comparison to the control group. Lauková et al. (2006) reported the antimicrobial activity of
probiotic and enterocin A-producing strain E. faecium EK13 in rabbits by the significant reduction of
E.coli counts 2 weeks after EK13 strain application (P<0.001). Enterocin CCM4231 has already been
experimentally added to the rumen fluid, cattle dung water and food products and showed the
inhibitory activity (Lauková et al., 1998a; 1998b; 1999a; 1999b; 2001a; 2001b). The antimicrobial
activities of Salvia officinalis can be attributed to the presence of high concentrations of thujone,
cineole and camphor, three monoterpenes with well documented antibacterial and antifungal potential
(Sur et al., 1991; Sivropoulou et al., 1997). Simonová et al. (2006) reported the reduction of 9
th World Rabbit Congress – June 10-13, 2008 – Verona – Italy
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Staphylococcus aureus and Clostridium-like sp. in the experimental group where enterocin produced
by a rabbit isolate E. faecium EF2019 strain was applied. The other bacteria were not influenced by
additives. In general, the bacterial counts in caecum were lower than in faeces and no significant
changes in bacterial counts were noted. In addition, Szabóová et al. (2006) showed the antimicrobial
activity of probiotic and bacteriocin-producing E. faecium CCM4231 strain in rabbit ecosystem by the
reduction of E.coli strains 7 days after CCM4231 administration (P<0.01) and Clostridium-like sp.
(P<0.01) at 35 day of the experiment compared to the control group. The phagocytic activity (PA) was
significantly increased in EG1 (sage; P<0.001; PA 27.7% ± 0.42) at day 21 in comparison to CG
(22.5% ± 0.85). In the experimental groups (EG1; EG2; EG3) prolonged immunostimulative effect
(P<0.001; Table 2) was observed in comparison to CG at day 42. In EG1 (sage) PA (30.5% ± 0.96)
was monitored; in EG2 (PPB CCM4231; 25.2% ± 0.80); in EG3 (sage with PPB CCM4231; 28.6% ±
0.51) compared to CG (PA 20.4% ± 0.51). Similar immunomodulatory activities have been reported in
the case of glucuronoxylan-related polymers as well as polysaccharides isolated from various herbal
plants (Capek et al., 2003).
In this experiment, the reduction of Eimeria sp. oocysts during bacteriocin CCM4231 and sage
administration (in the combination or without combined application) was noted. The most expressive
anticoccidial effect was recorded in EG3 at day 7 (PPB CCM4231 with sage) comparing to CG (in CG
65 OPG, in EG3 10 OPG). The oocysts were also reduced in EG2 (enterocin, 20 OPG) comparing to
CG (65 OPG); enterocin was probably responsible for oocysts reduction. Moreover, Simonová et al.
(2007) also reported reduction of Eimeria oocysts after application of Enterococcus faecium
CCM7420 and its PPB EF2019 in rabbits. At day 21, oocysts were also reduced in EG1 (30 OPG to
CG - 1184OPG); in EG2 and EG3 were found only rarely. The feeding of natural substances in rabbits
did not influence biochemical and zootechnical parameters, as well as it has not negative effect on
health status and growth performance of rabbits.
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