OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has downgraded the Financial Strength Rating (FSR) to A- (Excellent) from A (Excellent) and the Long-Term Issuer Credit Rating (Long-Term ICR) to “a-” from “a” of Kansas Medical Mutual Insurance Company (KaMMCO) (Topeka, KS). The outlook of these Credit Ratings (ratings) has been revised to negative from stable. In addition, A.M. Best has assigned an FSR of A- (Excellent) and a Long-Term ICR of “a-” to KaMMCO Casualty Company, Inc. (KaMMCO Casualty) (To