Global Swine Pneumonia Market Size, Trends, and Growth Opportunity, By Diagnosis (Serologic Tests, Polymerase Chain Reaction (PCR) Test, Others), Treatment (Vaccination, Antibiotics, Antibacterial, Others), Mode of Consultation (Over-the-Counter (OTC), Prescription), End-Users (Veterinary Hospitals, Veterinary Specialty Clinics, Others), Distribution Channel (Veterinary Hospital Pharmacy, Retail P