Atlas of pathology

Nodular lymphadenitis

Where: lymphatic system, lymph nodes

Differential diagnosis: Porcine circovirosisTuberculosis

This is tuberculosis in pigs, due to infection with one of the Mycobacterium species, often M avium. The lymph nodes of the neck and intestines of these pigs may be slightly enlarged and firm. The surrounding tissues and the body organs of the pigs often appear relatively normal. The affected nodes have firm grey swelling, with some nodules of various sizes and yellow gritty areas. The types of Mycobacteria that affect pigs are usually the ones found in poultry and birds and from the environment, particularly the soil. The disease is not transmitted between pigs, each individual pig gains the bacterial infection from the environment or interaction with birds. Tuberculosis in pigs is therefore usually seen in smaller farms where the pigs have prolonged access to soil or chickens. On some farms, pigs may have access to infected chicken or wildlife carcase materials presented as feedstuffs. The bacteria are eaten by the pig and settle in the lymph nodes, causing the relatively moderate lesions, usually seen at slaughter. In contrast to tuberculosis in cattle, the types of Mycobacteria and tuberculosis in pigs are not usually considered a threat to humans.

Steven McOrist
Where

cardiovascular system

digestive system

intestines

liver

mouth

stomach

genitourinary system

bladder

female genitourinay tract

kidney

male genitourinay tract

mammary gland

lymphatic system

lymph nodes

spleen

thymus

tonsils

musculoskeletal system

nervous system

other

respiratory system

lungs

nasal cavity

skin and subcutaneous tissue

Disease

Diseases caused by bacteria

App

Clostridium novyi

Clostridium perfringens

Mycoplasma suis

Actinobacillosis

Anthrax

Atrophic Rhinitis

Bordetelosis

Brucellosis

Colibacillosis

Colitis

Edema disease

Enzootic Pneumonia (EP)

Erysipela

Exudative Epidermitis

Glässer disease

Ileitis

Leptospirosis

Mycoplasmal arthritis

Pasteurellosis

Salmonellosis

Streptococcal infections

Swine dysentery

Tuberculosis

Yersinia infection

Diseases caused by virus

African swine fever

Aujeszky's disease

Blue eye disease

Classical Swine Fever

Encephalomyocarditis

Foot-and-mouth disease

Influenza

Japanese B Encephalitis

Nipah virus disease

Porcine circovirosis

Porcine cytomegalovirus infection

Porcine parvovirus infection

Porcine respiratory coronavirus infection

PRRS

Rotavirus infection

Diseases caused by parasites

Ascariasis

Coccidiosis

Mange

Metastrongylosis

Trichinellosis

Trichuriasis

Other

Epitheliogenesis imperfecta

Frostbite

Gastric ulcers

Hernias

Osteochondrosis

Other

Pityriasis rosea

Rectal prolapse

Shoulder ulcers

Sunburn

Thrombocytopaenic purpura

Torsion of the stomach and the intestines

Vice

Nutritional deficiencies

Biotin deficiency

Mulberry heart disease

Toxicoses

Aflatoxicosis

Ergotism

Zearalenone toxicosis