The Role of Co-infections in M. Hyopneumoniae Outbreaks among Heavy Fattening Pigs: a Field Study

Jun 17, 2022

Abstract: The role of co-infections in M. hyopneumoniae outbreaks among heavy fattening pigs: a field study

Little is known about how co-infections and genotype dynamics affect Mycoplasma hyopneumoniae infection in fattening pigs. This study was aimed at assessing the role of co-infections in M. hyopneumoniae outbreaks, their influence on the presence of M. hyopneumoniae genotypes and their impact on consequent lung lesions. Tracheobronchial swabs (TBS) from 300 finishers were collected from 10 farms at the onset of enzootic pneumonia outbreaks and 1 month later, sampling of 3 groups per farm: Group A showed clinical signs first, Group B was housed near Group A, and Group C was located in a different building. Pigs' lungs were scored at the slaughterhouse. TBS were tested for the main pathogens involved in respiratory diseases, and samples positive for M. hyopneumoniae were genotyped by multiple-locus variable-number tandem repeat analysis (MLVA). Pigs in Group A showed the highest prevalence and load of M. hyopneumoniae. A positive association was detected between M. hyopneumoniae and Mycoplasma hyorhinis, whereas Actinobacillus pleuropneumoniae was more frequent when the M. hyopneumoniae load was higher.

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Video: Evidence-Based PRRS Elimination Methods - Dr. Brent Pepin

In this episode of The Swine it Podcast Show, Dr. Brent Pepin, Director of Swine Health at the National Pork Board, explains how a systematic review of porcine reproductive and respiratory syndrome virus elimination methods is helping shape future herd health strategies. He discusses evidence-based farm and regional approaches, research gaps, and practical guidance to support informed decision-making across the swine industry. Listen now on all major platforms!

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"Disease status sharing gives producers the opportunity to make real-time decisions that reduce PRRS prevalence and protect regions from new exposure."

Meet the guest: Dr. Brent Pepin / brent-pepin-dvm-ms-7988066b is Director of Swine Health at the National Pork Board. After earning his DVM and M.S. from Iowa State University, he built extensive experience in swine veterinary practice, research, and herd health management. His current work focuses on disease control, traceability, and improving herd health across the U.S. swine industry. Listen to Brent Pepin on The Swine it Podcast Show, available on all major platforms.