Mycoplasma Respiratory Infections

Koyun Bronkopnömonilerinde Mannheimia haemolytica’nın İmmunohistokimyasal ve Bakteriyolojik İncelenmesi

“…In our study, the bronchopneumonic IHC positive lungs were mostly suppurative (46.03%) and the necrotic and fibrinous bronchopneumonia were in the next ranking (P=0.01). In addition, most chronic and some subacute suppurative bronchopneumonic lungs had known features of chronic enzootic pneumonia: bronchiolar epithelial metaplasia, bronchial epithelial hyperplasia and peri-bronchiolar lymphoid hyperplasia [19,22,23] . The etiology of the chronic enzootic pneumonia is complex.…”

“…In other words, isolation of the bacteria from chronic and/ or subacute purulent bronchopneumonic lungs with weak immunoreaction may support a secondary role for M. haemolytica in this type of pneumonia. Some authors believe that although mycoplasmas can interfere with host ciliary activity and therefore provide the invasion of other pathogens such as M. haemolytica [23] , they may also modulate growth or toxin production of M. haemolytica [19] .…”

Atypical non-progressive pneumonia in goats

“…The role of other mycoplasmas is less well understood. Mycoplasma ovipneumoniae has been reported in sheep but is often overlooked because of apparent greater involvement of pasteurellosis (Ayling and Nicholas, 2007). There are few reports incriminating M. ovipneumoniae as a cause of severe respiratory disease in goats.…”

“…ovipneumoniae is the most commonly isolated mycoplasma from the respiratory tract of sheep often in association with M. arginini that may exacerbate disease signs (Ayling et al, 2004;Ayling and Nicholas, 2007). A high prevalence of M. ovipneumoniae in association with M. haemolytica has been reported in the lungs of lambs in Turkey (Haziroglu et al, 1994) and recently in Italy (Ettorre et al, 2007).…”

“…High levels of mortality and morbidity were seen with isolation of M. ovipneumoniae, M. arginini and M. haemolytica; an additional sign in that report was caprine arthritic encephalitis. M. ovipneumoniae facilitates lung colonisation by other organisms, such M. haemolytica, producing a more severe pathology (Ayling and Nicholas, 2007). Respiratory disease involving M. ovipneumoniae has also been reported in goats in Spain, Nigeria, Sudan (CABI, 2006) and Canada, where M. ovipneumoniae was implicated in a developing fibrinous pleuritis and pneumonia in an experimental infection but M. arginini did not appear to be a significant pathogen (Goltz et al, 1986).…”