title: Experimental intramammary infection of the dairy cow with Escherichia coli during the nonlactating period.
abstract: The nonlactating mammary gland was experimentally inoculated with Escherichia coli. During the first half of the nonlactating period, 32% of 34 inoculated glands were temporarily infected. All intramammary infections were eradicated by the cow without therapy and no signs of mastitis were observed. During the 30 days before parturition occurred, 88% of 42 inoculated glands in the cows became infected. Twenty-three intramammary infections were eradicated by the cow and infection in 14 glands persisted after parturition occurred. Peracute toxic mastitis occurred in those cows with infected glands.
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology; D002418:Cattle Diseases / Q000209:etiology*; D004927:Escherichia coli Infections / Q000209:etiology / Q000662:veterinary*; D005260:Female; D007743:Labor, Obstetric; D007774:Lactation; D008414:Mastitis, Bovine / Q000209:etiology*; D011247:Pregnancy