Health Management Programmes for Commercial Poultry

Commercial poultry production in Southern Africa relies on strict biosecurity, vaccination, and targeted use of veterinary products to maintain flock health and productivity. Disease outbreaks in high-density poultry operations can devastate an entire shed within days.

Key Disease Threats

Viral Diseases

• •Newcastle Disease (NCD): One of the most economically devastating poultry diseases in Africa; high mortality; mandatory notifiable disease
• •Infectious Bronchitis (IB): Respiratory disease; also affects egg production and quality
• •Infectious Bursal Disease (Gumboro): Attacks the immune system in young birds
• •Avian Influenza (AI): Notifiable disease; some strains (H5N1, H7N9) are highly pathogenic and zoonotic
• •Marek's Disease: Lymphomatous disease in older birds

Bacterial Diseases

• •Salmonellosis: S. gallinarum (fowl typhoid), S. pullorum (pullorum disease); affects all ages
• •Colibacillosis: E. coli infections; secondary to stress or viral disease
• •Mycoplasma gallisepticum: Chronic respiratory disease; reduces production
• •Clostridial diseases: Necrotic enteritis (NE) in broilers

Parasitic Diseases

• •Coccidiosis (Eimeria spp.): Major cause of mortality and growth depression in broilers
• •Internal parasites (Ascarids, Heterakis): Significant in free-range systems
• •Red mite (Dermanyssus gallinae): Nocturnal blood feeder; major welfare and production concern in laying hens

Treatment Products

Coccidiosis Treatment

• •Amprolium: Water-soluble; effective against E. tenella and others
• •Sulphonamides (sulphaquinoxaline, sulphachlorpyridazine): Broad coccidial spectrum; short meat withdrawal
• •Toltrazuril: Highly effective single-dose treatment

Bacterial Infections

• •Oxytetracycline: Broad-spectrum; water-soluble
• •Enrofloxacin: Fluoroquinolone; very effective; use judiciously (resistance risk; may be regulated)
• •Trimethoprim-sulphamethoxazole: Combination product; broad-spectrum

External Parasites

• •Pyrethroid-based sprays for red mite (shed treatment, not on birds)
• •Diatomaceous earth: Physical control for red mite in organic systems

Vaccination Programme (example broiler)

Exact programmes vary by region, disease pressure, and vaccine availability — consult a local poultry veterinarian.

Biosecurity Fundamentals

• •Strict all-in/all-out management between flocks
• •Disinfection of sheds between flocks (formaldehyde, glutaraldehyde, or quaternary ammonium)
• •Footbaths at all entry points; dedicated shed clothing
• •Rodent control programme
• •Wild bird exclusion
• •Visitor logs and protocols