a case report of sporadic ovine listerial menigoencephalitis in iowa with an overview of livestock and human cases.a case of ovine listeriosis was examined in a flock of sheep. the index case was a male lamb, which was part of a flock of 85 sheep located in central iowa. because the sheep were raised on a premise where soybean sprouts were also cultivated for the organic foods market, the potential of a public health concern was addressed. to identify the source of contaminations, clinical and environmental samples were cultured for listeria monocytogenes. isolates were serotyped and analyzed using pulsed-fi ...200212152811
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