Association between Mannheimia haemolytica infection with reproductive physiology and performance in small ruminants: A review

Abstract

Mannheimiosis or pneumonic pasteurellosis commonly occurs in small ruminants. Mannheimiosis is caused by Mannheimia haemolytica (M. haemolytica) a Gram-negative coccobacillus producing acute febrile and infectious condition resulting in death of animal if not diagnosed and treated promptly. M. haemolytica serotype A2 is a commensal of the nasopharynx, gaining access to the lungs when host defenses are compromised by stress or infection in small ruminants. Till date, there is a vast literature and research that has been conducted on the pathogenesis of M. haemolytica invariably on respiratory system and its related immune system and mechanisms. From the clinical point of view, infection or diseases involving vital organs will systemically affect the production and performance of the infected animal. Therefore, there is a huge gap of knowledge and research to answer the question whether there is any association between M. haemolytica infection with reproductive physiology and performance in small ruminants and how it affects the productivity level. This review will explore the possibilities of involvement and new potential research to be carried out to determine the involvement of male and female reproductive system with M. haemolytica infection among small ruminants.

Prevalence and antibiotic susceptibility of Mannheimia haemolytica and Pasteurella multocida isolated from ovine respiratory infection: A study from Karnataka, Southern India

“…Respiratory disease in ruminant population accounts for substantial economic losses to the livestock sector globally [ 1 ]. Pasteurella multocida and Mannheimia haemolytica are the main etiological agents of the disease known to cause 30% of deaths in feedlot cattle and acute outbreaks in sheep population resulting in huge mortality all across the world [ 2 ].…”

Comparative protection of small ruminants against Mannheimia haemolytica infection by inactivated bacterin and toxoid vaccines

“…Mannheimia haemolytica occurs naturally as a commensal in the upper respiratory tract microbiota of ruminants. Infection is initiated when the animal’s immune system is compromised by predisposing factors such as stress, transportation, weather, or recurrent viral and mycoplasma diseases [ 7 , 8 ].…”

Isolation and Identification of Pasteurella multocida and Mannheim Hemolytica from Pneumonic Small Ruminants in Haramaya District, Eastern Ethiopia

“…Mannheimia haemolytica and Pasteurella multocida are the two most dangerous Pasteurella species in the cattle sector. These species live in the animal body as part of the normal nasopharyngeal microflora and are all susceptible to producing infection when the body's defensive mechanisms are compromised (Tadesse et al, 2017;Jesse et al, 2019). P. haemolytica is the most often isolated bacteria from shipping fever, which affects sheep and goats of all ages all over the world (Ozbey et al, 2004).…”