piglet in a barn
Close up of young pig face

Swine Respiratory Diseases

Protect Your Herd Against Respiratory Disease

Swine respiratory disease can destroy profitability in pig production. Often, multiple diseases, or co-infections, are involved, which can increase the length and severity of the diseases. These diseases are caused by respiratory viruses and pathogens within the porcine respiratory disease complex (PRDC), which includes both viral and bacterial respiratory pathogens, specifically porcine reproductive and respiratory syndrome virus (PRRSV), porcine circovirus Type 2 (PCV2), Mycoplasma hyopneumoniae (Mhp), influenza A virus in swine (IAV-S) and secondary bacterial agents.


Porcine reproductive and respiratory syndrome (PRRS) continues to be the most economically significant disease affecting the U.S. swine industry.1

pig in a barn


Mycoplasma hyopneumoniae (Mhp) is one of the smallest bacteria found in nature, and it can cause porcine enzootic pneumonia in pigs.

pigs gathered together in a barn


There are three major porcine circovirus Type 2 (PCV2) genotypes in circulation: PCV2a, b and d, with PCV2d accounting for more than 90% of U.S. PCV2 infections.2–3 

farmers walking through factory

Get Customized Control with the FLEX Family

No other animal health company provides more FLEXible solutions, along with the ability to customize the control of major swine respiratory and reproductive diseases, than Boehringer Ingelheim.  


1 Holtkamp DJ, Kliebenstein JB, Neumann EJ, et al. Assessment of the economic impact of porcine reproductive and respiratory syndrome virus on U.S. pork producers. J Swine Health Prod

2 Segalés J, Allan G, Domingo M. Circoviruses. Zimmerman J, Karriker LA, Ramirez A, et al., eds. Diseases of swine. 11th ed. West Sussex: Wiley-Blackwell, 2019;473–487.  

3 Madson D. Porcine circoviruses: Are changes occurring? In Proceedings. 50th Annu Meet AASV 2019;5–8.  

©2022 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All Rights Reserved.  US-POR-0121-2022