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  • Title: Epidemiology of Mycoplasma bovis in Pennsylvania veal calves.
    Author: Soehnlen MK, Aydin A, Murthy KS, Lengerich EJ, Hattel AL, Houser BA, Fenton GD, Lysczek HR, Burns CM, Townsend AM, Brooks JW, Wolfgang DR, Jayarao BM.
    Journal: J Dairy Sci; 2012 Jan; 95(1):247-54. PubMed ID: 22192204.
    Abstract:
    The objective of the study was to estimate the prevalence and incidence of Mycoplasma bovis, a common cause of pneumonia, in veal calves. Using simple random sampling, 252 calves from 4 veal herds located in central Pennsylvania were selected and longitudinally followed for monthly collection of nasal swabs. Bronchial swabs and lung lesions were collected at the slaughterhouse. Nasal, bronchial, and lung lesion swabs were cultured for bacterial respiratory pathogens. Ninety lung lesions were identified, of which 41.1, 1.1, 1.1, 7.8, and 4.4% were culture positive for M. bovis alone, Pasteurella multocida alone, Mannheimia haemolytica alone, M. bovis and P. multocida co-infection, and M. bovis and M. haemolytica co-infection, respectively. The data indicate that potential interventions, such as therapeutics, vaccines, or management control measures, would be most effective before 50 d of age based upon the cumulative incidence of colonization.
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