Diseases of the gilt and
young boar
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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 |
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Arthritis 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 |
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Brucellosis Uncommon, to consider in
orchitis cases |
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 |
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Classical Swine
Fever African Swine Fever Can result in severe
disease and mortality with haemorrhage throughout the carcase. |
Colitis Common – chronic diarrhoea
check housing, stress, and feed/water contamination. The right photograph shows the classic
loose stool. |
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Conjunctivitis 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. |
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Endocarditis May result in sudden death – streptococci and erysipelas common causes. |
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. |
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Foot and mouth
disease Vesicle and ulcers suddenly
on the feet and snout – any suspicion must contact your vet immediately |
Epiphyseolysis Part of the OCD complex,
combined with trauma, results in separation at the epiphyseal plate |
Fractures When recognized –
euthanasia the only option. |
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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 |
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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 |
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- OCD Very common only painful when bone surface exposed |
- sores Review flooring management |
Insect bites Common leads to damage in
skin condition PRRSV risk |
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Leukaemia In gilts and young sows a
common differential cause of unresponsive thin sows |
Leptospirosis L. icterohaemorrhagica can cause hepatitis and death. Pigs may present with jaundice. |
Lice Uncommon now – Haematopinus suis – large biting louse – easily seen. |
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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 |
Parasites Check feacal worm egg
numbers. Photograph shows a strongyle
egg |
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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. |
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PRRSV Very common. Contributes to
severe respiratory disease in the nursery and growing pigs. Also may have severe reproductive
effects. Difficult to control. |
PSS Genetic condition of pigs –
results in sudden death, classically in transport |
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Prolapse of the
rectum Common – may be difficult
to treat successfully, many progresses to rectal strictures. |
Ringworm Uncommon. Infected skin show increasing circular
areas |
Salmonellosis – cholerasuis Specific salmonella of pigs
– resulting in diarrhoea and pneumonia in the same group of pigs |
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- 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 |
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Sunburn 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. |
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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. |
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Tuberculosis 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. |