3 National Institute of Public Health, Department of Bacteriology, PO Box 4404 Torshov, 0403 Oslo, Norway The present paper presents the conclusions of a polyphasic investigation of the taxonomy of the t re ha loseneg a t ive [Pasteurella] haemolytica com p I ex. Clusters previously identified by ribotyping and multilocus enzyme electrophoresis (MEE) have been evaluated by 165 rRNA sequencing a...

Here, we report the genome sequence of Mannheimia haemolytica serotype 1 strain 16041065 BH, which was recently isolated from a Midwestern calf that died due to Mannheimia haemolytica-induced pneumonia. This genome comprised a total of 2.7 Mb, with an N50 of 122 kb, and maintained hemolytic activity when grown on blood heart infusion agar supplemented with 5% sheep's blood.

OBJECTIVE To characterise eight isolates of a Gram-negative organism obtained from the upper respiratory tract of cattle showing evidence of mild upper respiratory tract disease. DESIGN The isolates were compared with the five recognised species within the genus Mannheimia - M haemolytica, M glucosida, M granulomatis, M ruminalis and M varigena--using a range of phenotypic and genotypic metho...

OBJECTIVE To determine effects of the selectin inhibitor TBC1269 on neutrophil-mediated pulmonary damage during acute Mannheimia haemolytica-induced pneumonia in newborn calves. ANIMALS Eighteen 1- to 3-day-old colostrum-deprived calves. PROCEDURE Mannheimia haemolytica or saline (0.9% NaCl) solution was inoculated in both cranial lung lobes of 12 and 6 calves, respectively. Calves were eut...

We investigated the dynamics and duration of antibody titer against Mannheimia haemolytica in Japanese Black calves. Twenty unvaccinated calves from two Japanese Black breeding farms in Kagoshima Prefecture, Japan, were studied. The antibody titer against M. haemolytica reached the lowest level at 8 weeks of age after birth. Calves began producing antibody against M. haemolytica by themselves b...

Here we report two genome sequences, one complete and one draft, from virulent bovine strains of Mannheimia haemolytica serotype A1 recovered prior to the field usage of modern antimicrobial drugs.

BACKGROUND Sheep constitute the second major component of livestock in Ethiopia. However, efficient utilization of this potential resource is hampered by combination of health problems, poor management and feed shortage. Haramaya district is one of the remote settings in Ethiopia where information about the livestock disease is not well documented. Hence this study was conducted to determine th...

Mannheimia haemolytica is a Gram-negative bacterium and the principal etiological agent associated mostly with bovine respiratory disease complex. However, we report here the sequence of a strain with the novel A1/A6-cross-reactive serotype, strain PKL10, isolated from white-tailed deer. PKL10 was isolated from the spleen of farmed white-tailed deer showing clinical signs of pneumonia. The geno...

Mannheimia haemolytica isolated from feedlot cattle were tested for tulathromycin resistance. Cattle were sampled over a 3-year period, starting 12 months after approval of tulathromycin for prevention and treatment of bovine respiratory disease. Nasopharyngeal samples from approximately 5,814 cattle were collected when cattle entered feedlots (N = 4) and again from the same cattle after ≥60 da...