Incidence of Mastitis-Causing Organisms in Angus, Brahman, and Reciprocal-Cross Cows Grazing Endophyte-Infected Tall Fescue or Common Bermudagrass1,21Cooperation of the Arkansas Agric. Exp. Sta., Univ. of Arkansas is gratefully acknowledged as is the technical assistance of employees of the Dale Bumpers Small Farms Research Center and Immunology and Disease Resistance Laboratory. Approved for publication by the Director of the Arkansas Agric. Exp. Sta., ms. no. 98006.2Mention of a trade name, proprietary product, or specific equipment does not constitute a guarantee or warranty by the USDA and does not imply approval to the exclusion of other products that may be suitable.