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Oral and Poster Abstracts

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detection of M. wenyonii infection. An investigation of M. wenyonii<br />

was confirmed in shorthorn cows on Sh<strong>and</strong>ong province. Slide<br />

method test was carried out for the detection of Eperythrozoon in<br />

412 shorthorn cows from six different herds. Ninety three of the 412<br />

cows (22.6%) showed Eperythrozoon positive reactions, <strong>and</strong> the<br />

test-positive Eperythrozoon were then conformed by PCR analysis.<br />

81(88.2%) of the 93 Eperythrozoon positive samples revealed<br />

positive. Furthermore, the positive rates for M. wenyonii infection<br />

were 6.3% (26) in the 0-2-year-old group, 4.1% (17) in the 2-4-yearold<br />

group, 4.6% (19) in the 4-6-year-old group, <strong>and</strong> 4.6% (19) in the<br />

> 6-year-old group by PCR analysis. With regard to the age element,<br />

younger cows also showed a higher prevalence of Mycoplasma<br />

wenyonii infection than the adults in the current study, because<br />

statistical analysis indicated that significant difference was observed<br />

in

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