Diseases or disorders of the weaner and grow/finish pig

Abscess 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
Arthritis Arthritis in growing pigs associated with infection of the joint multiple causes	Ascaris suum Larval migration through liver results in ‘white spots’.	Aural Haematoma Associated with shaking of the head. Can become very large. Most will resolve with time.
Atrophic rhinitis – progressive Often subclinical on a lot of farms. Toxin from Pasturella multocida results in deformation and twisting of the snout which can be very severe.		Aujeszky’s Disease – Pseudorabies In naive herds can result in severe pneumonia with neurological signs
Bordetellosis Can cause moderate temporary atrophic rhinitis and conjunctivitis	Bursitis 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
Bowel Oedema Associated with E. coli F18. Review farm genetic make-up if problems are severe.	Classical Swine Fever African Swine Fever Can result in severe disease and mortality with haemorrhage throughout the carcase.	Clostridial diseases Clostridial diseases can enter the nursery from the farrowing house.
Coccidiosis Isospora suis can enter the early nursery with diarrhoea	Colitis Common – chronic diarrhoea check housing, stress, and feed/water contamination	Colitis The photograph shows the classic loose stool.
Conjunctivitis Can be very severe on farms – review atrophic rhinitis control and environmental factors	Coliform post-weaning diarrhoea Common – medication aims to control. Review environment of nursery	Endocarditis May result in sudden death – streptococci and erysipelas common causes.
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.		Eperythrozoonosis Clinically uncommon may result in anaemia. Associated with Mycoplasma haemosuis.
Erysipelas Can be explosive in the finishing herd, characteristic diamond shaped skin markings shown.	Flank biting Stressed pigs bite at other pigs flanks. Often associated with well docked pigs. Check for draughts	Foot and mouth disease Vesicle and ulcers suddenly on the feet and snout – any suspicion must contact your vet immediately
Fractures When recognized – euthanasia the only option.	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
Hernia – scrotal Generally small, problem when castrating	Hernia – umbilical Can become very large – once over 30 cm, damaged or in contact with the ground – euthanize.	Glasser’s disease Common post-weaning classically - polyserositis
Greasy pig disease Common in nursery – check for stressors leading to fighting	Kinky Back When recognized and severe euthanase	Jaundice Consider Leptospirosis from rodent., PMWS or anaemia
Lameness in general – Very common with many causes as shown	- Deformed legs Review breeding program	- infections Review flooring management
- OCD Very common only painful when bone surface exposed	- sore feet - bruised Review flooring type and management	- sores Review flooring management
Insect bites Common leads to damage in skin condition PRRSV risk	Leptospirosis L. icterohaemorrhagica can cause hepatitis and death. Pigs may present with jaundice.	Lice Uncommon now – Haematopinus suis – large biting louse – easily seen.
Mange mites (Sarcopties scabiei) Common – causes scratching and increased stress in the finishing stage	Middle ear disease Associated with infection from the nose and Eustachian tube to the ear.	Mulberry heart disease Common - affects the strongest pigs 2-3 weeks post-weaning resulting in sudden death.
Mycoplasma arthritis M. hyosynoviae – clinically more common in introduced gilts or boars – synovitis and shifting lameness.	Parakeratosis Associated with a deficiency of zinc or excess of calcium	Parasites Check feacal worm egg numbers. Photograph shows a strongyle egg
Pasteurellosis Very common – secondary infection of the lung – picture shows lung abscesses originated from a tail bite.	Pityriasis rosea Common in growing pigs. The lesions are genetic in origin and self resolve.	PDNS Generally uncommon, unless farm suffers from PMWS. Need to differentiate from CSF
Porcine Enteropathy Ileitis PIA Common – numerous forms of Porcine enteropathy (ileitis or porcine intestinal adenomatosis). Result in uneven growth in the finishing phase.	- Regional ileitis Severe thickening of the distal ileum results in very emaciated pigs.	- 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.	- Porcine Intestinal adenomatosis - PIA Occurs in most pigs areas of thickening in distal ileum.	PRRSV Very common. Contributes to severe respiratory disease in the nursery and growing pigs. Also may have severe reproductive effects. Difficult to control.