Shares of Kinetic Concepts ( KCI) were among the worst-performing health-related stocks Monday, falling 8% after the medical-equipment maker posted mixed fourth-quarter results and forecast 2006 sales below Wall Street's expectation.

For the fourth quarter, the company earned $46.4 million, or 64 cents a share, on sales of $322 million. Analysts polled by Thomson First Call expected earnings of 61 cents a share and sales of $336.7 million. During the year-earlier quarter, the company earned $34.2 million, or 47 cents a share, on sales of $273.7 million.

Looking ahead, Kinetic Concepts sees 2006 earnings of $190 million to $200 million, or $2.59 to $2.69 a share, on sales of $1.34 billion to $1.39 billion. The earnings forecast includes 10 cents to 11 cents a share in stock-based compensation expense. Analysts' estimates, which don't include the stock-based compensation costs, call for earnings of $2.66 a share and sales of $1.41 billion. Shares were trading down $3.05 to $39.65.

Shares of Omnicare ( OCR) tumbled 10% after an analyst downgrade and a reported raid on some of the company's offices. According to a Cincinnati Enquirer report Friday, the Michigan attorney general's office said its agents led a raid into Omnicare's offices in Livonia, Mich., and other unspecified cities, but didn't disclose the reason for the searches. Stifel Nicolaus downgraded Omnicare to hold from buy, citing the report. In a statement Monday, Omnicare said it doesn't comment on or confirm government reviews or inquiries. Shares of Omnicare, a drug supplier to nursing homes, fell $5.62 to $49.43.

Kensey Nash ( KNSY) fell 5% after the company posted mixed second-quarter results and offered soft guidance. For the quarter ended Dec. 31, the medical-device company reported a loss of $555,860, or 5 cents a share, on total sales of $13.6 million. Excluding one-time items and stock-based compensation costs, the company earned $1.4 million, or 12 cents a share. Analysts expected earnings of 10 cents a share on this basis, with sales of $14.2 million. During the year-earlier period, the company earned $3.3 million, or 27 cents a share, on sales of $15.2 million.

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