bovis - Articles
Mannheimia haemolytica
Synonym(s): Pasteurella hemolytica biotype A
Introduction
Classification
Taxonomy
- Kingdom: bacteria.
- Phylum: proteobacteria.
- Class: gammaproteobacteria.
- Order: pasteurellales.
- Family: pasteurellaceae.
- Genus: Mannheimia.
- Species: Mannheimia haemolytica.
- Previously known as Pasteurella haemolytica, biotype A.
Etymology
- Gk: haima ; L: haema- blood. Gk: lutikê: able to loosen/dissolve.
Distribution
- Worldwide distribution.
- Commensals in the upper respiratory tract of healthy cattle (especially tonsil crypts) and other animals.
- Survial in the environment is short.
Significance
- Difficult to isolate from healthy cattle.
- Following stress, M. haemolytica replication rate increases in the upper respiratory tract. From here it can be inhaled into the lungs where it can subsequently rapidly colonize.
- Principal bacteria associated with bovine respiratory disease (BRD) Adult respiratory disease Calf respiratory disease.
- Causes pneumonia via necrosis, thrombosis, and exudation in the lungs.
- Serotype A1 amd A6 are most commonly isolated from cattle.
- May occasionally cause mastitis.
Active Forms
Subscribe To View
This article is available to subscribers.
Try a free trial today or contact us for more information.
Resting Forms
Subscribe To View
This article is available to subscribers.
Try a free trial today or contact us for more information.
Clinical Effects
Subscribe To View
This article is available to subscribers.
Try a free trial today or contact us for more information.
Diagnosis
Subscribe To View
This article is available to subscribers.
Try a free trial today or contact us for more information.
Further Reading
Publications
Refereed Papers
- Recent references from PubMed and VetMedResource.
- Capik S F, White B J, Lubbers B V, Apley M D, Mosier D A, Larson R L & Murray R W (2015) Characterization of Mannheimia haemolytica in beef calves via nasopharyngeal culture and pulsed-field gel electrophoresis. J Vet Diagn Invest 27 (5), 568-75 PubMed.
- DeDonder K D & Apley M D (2015) A literature review of antimicrobial resistance in
Pathogens associated with bovine respiratory disease. Anim Health Res Rev 16 (2), 125-34 PubMed. - Noyes N R, Benedict K M, Gow S P, Booker C W, Hannon S J, McAllister T A & Morley P S (2015) Mannheimia haemolytica in feedlot cattle: prevalence of recovery and associations with antimicrobial use, resistance, and health outcomes. J Vet Intern Med 29 (2), 705-13 PubMed.
- Klima C L, Alexander T W, Hendrick S & McAllister T A (2014) Characterization of Mannheimia haemolytica isolated from feedlot cattle that were healthy or treated for bovine respiratory disease. Can J Vet Res 78 (1), 38-45 VetMedResource.
- Timsit E, Christensen H, Bareille N, Seegers H, Bisgaard M & Assié S (2013) Transmission dynamics of Mannheimia haemolytica in newly-received beef bulls at fattening operations. Vet Microbiol 161 (3-4), 295-304 PubMed.
- VanRensburg E & Du Preez J C (2006) Effect of pH, temperature and nutrient limitations on growth and leukotoxin production by Mannheimia haemolytica in batch and continuous culture. J Appli Microbiol 102 (5), 1273 - 1282.