Diseases of the gilt and young boar


Abscess foreleg

APP-finisher 13 sw

APP lung-lesion in dorsal part kr


Common –associated with streptococci or Arcanobacter pyogenes.

Actinobacillus pleuropneumonia

Can cause severe pleuropneumonia and death.  Classic ‘strawberry’ lesions in the caudal (diaphragmatic) lobe of the lung.  In most pigs APP causes no problems.  When problems occur review environment and stress factors

Leg lame boar hind leg kr

Atresia ani 01  sw

Aujeszky's disease nervous 2


Arthritis in growing pigs associated with infection of the joint multiple causes

Atresia ani

Uncommon, but may be seen in adult gilts.  Gilts survive by urinating and defecation out of the vulva

Aujeszky’s Disease – Pseudorabies

In naive herds can result in severe pneumonia with neurological signs

Repro orchitis Strep 02sw

Leg bursa on hindleg

Leg bush foot


Uncommon, to consider in orchitis cases


Common – contact with hard surfaces results in a fluid filled lump blemish on the leg can lead to rejection of gilt

Bush foot/ foot rot

Infection of the toe with streptococci results in severe lameness and swelling of the lower foot

ASF Abdomen 1


Faeces loose

Classical Swine Fever

African Swine Fever

Can result in severe disease and mortality with haemorrhage throughout the carcase.


Common – chronic diarrhoea check housing, stress, and feed/water contamination.  The right photograph shows the classic loose stool.


prrsConjunctivitis 01sw

Mycoplasma insitu B

Enzootic pneumonia - mycoplasma free


Can be very severe on farms – review atrophic rhinitis control and environmental factors

Enzootic (Mycoplasma) pneumonia

Very common – classically results in pneumonia at 60-90 kg.  Generally complicated with secondary infections.  Most are associated with Mycoplasma hyopneumoniae (left) but SIV and Pasteurella (right) can produce very similar clinical and pathological signs.

Heart cauliflower valves

Eperythrozoon suis finisher 02sw



May result in sudden death – streptococci and erysipelas common causes.


Clinically uncommon may result in anaemia.  Associated with Mycoplasma haemosuis.


Can be explosive in the finishing herd, characteristic diamond shaped skin markings shown.


Legs epiphysiolysis gilt

Legs broken elbow

Foot and mouth disease

Vesicle and ulcers suddenly on the feet and snout – any suspicion must contact your vet immediately


Part of the OCD complex, combined with trauma, results in separation at the epiphyseal plate


When recognized – euthanasia the only option.

Anaemic grower gastric ulcer

Gastric ulcers 02sw

Post mortem ventral remove

Gastric ulcers

Common – result of not eating for 24 hours and maintained by fine feed and stress.  Note pale dead pig left and large ulcer in stomach right

Glasser’s disease

Sudden death within days of arrival – acute meningitis and pleurisy

Foot lame  weaners

Leg conformation pointing kr

Lame swollen joint hind 2

Lameness in  general –

Very common with many causes as shown

- configuration

Poor conformation results in excess strain on muscles and bones

- infections

Review flooring management

Lame osteochondrosis B

Leg ulcer bad kr

Skin insect bite 2


Very common only painful when bone surface exposed

- sores

Review flooring management

Insect bites

Common leads to damage in skin condition PRRSV risk

Leukaemia 3

Security rodent dead

Lice B


In gilts and young sows a common differential cause of unresponsive thin sows


L. icterohaemorrhagica can cause hepatitis and death.  Pigs may present with jaundice.


Uncommon now – Haematopinus suis – large biting louse – easily seen.

Myco OCD SN4

Mange itchy pig

Worm stongyle

Mycoplasma arthritis

M. hyosynoviae – clinically more common in introduced gilts or boars – synovitis and shifting lameness.

Mange mites (Sarcopties scabiei)

Common – causes scratching and increased stress in the finishing stage


Check feacal worm egg numbers.  Photograph shows a strongyle egg

PIA variable pigs2

PIA necrotic enteritis PM

PIA haemorrhagic gross PM

PE  Ileitis PIA

Common – numerous forms of Porcine enteropathy (ileitis or porcine intestinal adenomatosis).  Result in uneven growth in the finishing phase.

- necrotic ileitis

Severe form with damage to the lining of the intestinal tract which dies and is shed.

- haemorrhagic ileitis

More often seen in older finishing pigs, sudden death with small intestines full of blood.

PRRSV nursery kr

PRRS histology + normal

Post mortem external


Very common. Contributes to severe respiratory disease in the nursery and growing pigs.  Also may have severe reproductive effects.  Difficult to control.


Genetic condition of pigs – results in sudden death, classically in transport

Rectumprolaps 02sw

Skin ring worm


Prolapse of the rectum

Common – may be difficult to treat successfully, many progresses to rectal strictures.


Uncommon.  Infected skin show increasing circular areas

Salmonellosis – cholerasuis

Specific salmonella of pigs – resulting in diarrhoea and pneumonia in the same group of pigs

Salmonella pig gross

Lame spinal abs 2

Diarrhoea finisher

- typhimurium

Together with other types of salmonellae  cause mild to severe diarrhoea and enteritis

Spinal abscess

Sudden presentation with hind limb paralysis, but the front end is fine. Common with tail bitten pigs.

Spirochaetal diarrhea

Brachyspira pilosicoli resulting in a colitis and chronic diarrhoea

Skin sunburn2

Swine Dysentery-acute 03sw

Swine dysentery PM


Can occur in indoor pigs if insufficient protection offered against the sun

Swine dysentery

Associated with Brachyspira hyodysenteriae can result in a severe, often fatal haemorrhagic colitis and typhlitis.

Swine Influenza running nose

Twist bloated pig 1

Torsion spleen stomach

Swine influenza

Rapid spreading cough and pyrexia in the finishing herd characterizes flu.

Torsion of the intestines

Sudden death in grow/finish pigs may commonly be associated with an intestinal torsion, shown is the gross pig, torsion of the stomach/spleen and on the right torsion of the liver.

TB Neck Lymphnodes

Grower big pen

Repro vulva dry


Generally diagnosed at slaughter with enlarge caseous lymph nodes as shown

. Yersinia infections

Generally no clinical signs, reacts with Brucella tests.

Water deprivation

Can result in excoriation of the vulva.  Severe will lead to death.