Final answer:
The three bacteria that often cause BRDC are Mannheimia haemolytica, Pasteurella multocida, and Mycoplasma bovis.
Step-by-step explanation:
The three bacteria that commonly cause Bovine Respiratory Disease Complex (BRDC) are Mannheimia haemolytica, Pasteurella multocida, and Mycoplasma bovis. These bacteria typically exist peacefully in the respiratory tract of healthy animals, but under stressful conditions or when the immune system is compromised, they can cause severe illness. Symptoms of BRDC can include coughing, fever, and difficulty breathing, and if left untreated, the disease can lead to serious complications, including pneumonia and potentially death.
Learn more about BRDC