Identification of Mycoplasma Species in Cattle Associated with Bovine Respiratory Disease Mortality. in Microorganisms / Microorganisms. 2024 Nov 16;12(11):2340. doi: 10.3390/microorganisms12112340.

2024
ASL VCO

Tipo pubblicazione

Journal Article

Autori/Collaboratori (8)Vedi tutti...

Carella E
Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, 10154 Torino, Italy.
Messana E
Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, 10154 Torino, Italy.
Mugetti D
Dipartimento di Prevenzione, Azienda Sanitaria Locale del Verbano Cusio Ossola, Via Mazzini 117, 28887 Omegna, Italy.

et alii...

Abstract

Approximately 30 distinct Mycoplasma species have been isolated from cattle, but only a few are pathogenic and can cause serious respiratory diseases. Consequently, this study aimed to identify Mycoplasma spp. infections in cattle with bovine respiratory disease (BRD), considering factors such as animal demographics, concurrent infections with other pathogens, post-mortem clinical findings and histological examinations, and seasonality. A total of 326 samples were collected from 322 cattle that had died from BRD in Northwestern Italy. A total of 54 animals (16.8%) tested positive for Mycoplasma spp., and Mycoplasma bovis (n = 22, 40.7%) and Mycoplasma dispar (n = 13, 24.1%) were the most frequently detected species among the examined cattle. Among positive cattle, those aged five months or younger were approximately five times more likely to be infected by Mycoplasma dispar than by Mycoplasma bovis compared to those older than five months (proportional incidence ratio: 5.1, 95% CI 1.2-21.2). The main bacterial pathogens identified in cattle exhibiting co-infection was Pasteurella multocida, whereas the main viral pathogens were BRSV and BoHV-1. Histopathological investigations predominantly revealed catarrhal bronchopneumonia or purulent catarrhal bronchopneumonia among the examined cattle. Finally, Mycoplasma hyopharyngis, a species isolated from the pharyngeal and nasal cavities of pigs so far, was detected for the first time in the pneumonic lung of a bovine infected with BRD. Further investigations are necessary to thoroughly characterize its host range and pathogenic potential.

Accesso banca dati bibliografica

PMID : 39597730

DOI : 10.3390/microorganisms12112340

Keywords

BRD; Mycoplasma hyopharyngis; Mycoplasma spp.; Ureaplasma spp.; co-infections; seasonality;