title: Epidemiology of Mycoplasma bovis in Pennsylvania veal calves.
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.
authors.affiliation: Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: M K
authors.initials: MK
authors.lastname: Soehnlen
authors.forename: A
authors.initials: A
authors.lastname: Aydin
authors.forename: K S
authors.initials: KS
authors.lastname: Murthy
authors.forename: E J
authors.initials: EJ
authors.lastname: Lengerich
authors.forename: A L
authors.initials: AL
authors.lastname: Hattel
authors.forename: B A
authors.initials: BA
authors.lastname: Houser
authors.forename: G D
authors.initials: GD
authors.lastname: Fenton
authors.forename: H R
authors.initials: HR
authors.lastname: Lysczek
authors.forename: C M
authors.initials: CM
authors.lastname: Burns
authors.forename: A M
authors.initials: AM
authors.lastname: Townsend
authors.forename: J W
authors.initials: JW
authors.lastname: Brooks
authors.forename: D R
authors.initials: DR
authors.lastname: Wolfgang
authors.forename: B M
authors.initials: BM
authors.lastname: Jayarao
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000382:microbiology; D002417:Cattle; D015994:Incidence; D008168:Lung / Q000382:microbiology; D009175:Mycoplasma Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D045682:Mycoplasma bovis; D010414:Pennsylvania / Q000453:epidemiology; D018410:Pneumonia, Bacterial / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary; D015995:Prevalence; D012137:Respiratory System / Q000382:microbiology