Glaesserella parasuis Vaccine, Avirulent Live Culture 


Glaesserella parasuis (GPS), formerly Haemophilus parasuis, is an early colonizer of the upper respiratory tract of pigs.  


The duration of GPS can be short, but it causes a high mortality rate if left untreated. In less than 48 hours, this pathogen can cause systemic infection and death. Other effects include systemic lesions characterized by arthritis, polyserositis and meningitis.  


GPS is the fifth-most frequently detected pathogen on respiratory tissues since 2017, and is frequently associated with porcine reproductive and respiratory syndrome (PRRS), influenza A virus in swine (IAV-S), Mycoplasma hyorhinis (M. hyorhinis) and Streptococcus suis  (S. suis).  


PARASAIL is an intramuscularly administered avirulent live, single-dose Haemophilus parasuis (Glaesserella parasuis) vaccine that aids in the protection from Glässer’s disease.  


  • Available in a 50-mL/50-dose presentation.

Features & Benefits


  • The industry’s first avirulent live, single-dose GPS vaccine.  
  • PARASAIL is a USDA-licensed product shown to provide protection against one of the most common strains of GPS in circulation (serovar Type 5).  


PARASAIL saves pig producers time, money and stress. Here’s how:  

  • PARASAIL comes in a convenient one-dose intramuscular formulation.  

  • PARASAIL's low, 1-mL dose size means minimum tissue disruption for pigs.  

  • PARASAIL is simple to use and rehydrate. An easy-to-read instruction sheet in both English and Spanish is included with each bottle for simplified vaccine-crew training.  

Dosage & Administration

Lyophilized  Form 

  • Aseptically rehydrate the freeze-dried vial of PARASAIL by adding the full contents of the accompanying diluent to the vaccine vial. (See insert for complete directions.)  
  • Mix well and use immediately.  

  • Inject 1-mL dose intramuscularly (IM).  


Product Inserts & Labels


For use in swine only.  

Store at 35–46˚F (2–8˚C). Do not freeze. Use entire contents when first opened.  

Do not treat animals with antimicrobials effective against Haemophilus spp. for a period from 72 hours before until 24 hours after administration of this vaccine.  

Do not vaccinate within 21 days before slaughter.  

Do not mix with other products, except as specified in the insert.  

In case of human exposure, contact a physician.  

Inactivate unused contents before disposal.  


PARASAIL is a registered trademark of Boehringer Ingelheim Animal Health USA Inc. ©2021 Boehringer Ingelheim Animal Health USA Inc., Duluth, GA. All Rights Reserved.