Atlas of pathology

Eyelid oedema

Where: skin and subcutaneous tissue

Differential diagnosis: Edema diseaseVice

Vero-toxigenic Escherichia coli infections are the cause of oedema disease, which is usually seen in groups of pigs 7 to 14 days after weaning. The pigs often develop nervous signs including uncoordinated ataxia, recumbency and convulsions. Many of the sick pigs also have marked soft tissue swelling (oedema) of the upper and lower eyelids. Some affected pigs can also have an amazing change in their normal vocalisation sounds, from the usual strong squealing sound, into a high-pitch squeaky voice. At autopsy, the soft gelatinous oedema is evident in the eyelids, but also in the area of the colon, the wall of the stomach and the larynx. The causative E coli bacteria are located in the nursery farm environment and are ingested by the piglet soon after weaning. The bacteria then attach to the small intestine and their vero-toxins cause blood vessel disturbances in the brain and these other locations in the pig. It is therefore important to note that the intestines of the pigs must be sampled to culture the correct strain of E coli. The reduction of usage of zinc oxide feed additive away from appropriate anti-E coli pharmaceutical levels has led to increased outbreaks in some locations.

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