Citation
Yerima, Adamu Abubakar and Hassan, Latiffah and Zakaria, Zunita
(2012)
Evaluation of the survival of vancomycin-resistant enterococci (VRE) isolated from chickens and possible inactivation by in-use concentration of Lindores®, Ecos Timsen® and Omnicide®.
Malaysian Journal of Veterinary Research, 3 (2).
pp. 5-14.
ISSN 2180-3897
Abstract
Vancomycin-resistant enterococci (VRE) are well-known
ascendant nosocomial pathogens. The recent detection of epidemiologic strain carrying vanA gene in the community
of people working with animals and in chickens has brought to the forefront the potential public health danger posed by
these organism. The farm environment is a major source of VRE persistence in poultry farms. We carried out survival
test to test the survival of the VRE isolates on dry condition and surface test to evaluate the inactivation of the isolates by in-use concentration of commonly
used disinfectants. In the survival test, all isolates survived for at least 4 weeks in colony counts of (1.00 × 103 – 3.86 × 103 CFU/ml) under clean condition and (1.00
× 103 – 2.02 × 104) for soiled condition. Those that were suspended in 5% BSA solution to mimic organic matter load as
obtainable on farms survived for at least 8 weeks at (1.54 × 102 – 1.34 × 103 CFU/ml). In the surface test, inactivation of VRE isolates by in-use concentration of
Lindores, Omnicide and Ecos Timsen was tested using the European surface test (EST). All the tested disinfectants
were active against the VRE isolates on both the standard test surface (stainless steel) and our test surface (wooden). The results shows microbiocidal effects (ME)for test disinfectants, i.e. the log10 CFU of micro-organisms compared between test biocide and control treated with distilled water, after 7 min of exposure as follows; Lindores® active on both surfaces 5.24 and 3.17, Ecos Timsen® active significantly on steel 4.90 than wood 2.98 and Omnicide® significantly less active on stainless steel 2.40 than on wood 3.50.
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