perosis

2.  Slipped Tendon or Perosis is metabolic
disease that causes deforming ,leg
weakness in chickens ,ducks & turkeys.
 It is usually seen in poultry under six weeks
of age.
 It results in flattened & enlarged hocks.
 It is called as “Spraddle legs” if both legs are
affected.

3. Spraddle leg

4.  Perosis is caused by the deficiency of
number of trace nutrients.
 Primarily Manganese & Choline.
 But Zinc ,Pyridoxine ,Biotin ,Folic acid ,&
Niacin may also be involved.
 In Turkeys it may be an inherited
Galactosamine deficiency.

5.  Short legs
 Lameness
 Distortion of Hock
 Slipping of Achilles tendon
 Malposition of leg distal to hock
 In embryos parrot beak , shortened bones.

6.  The back of the hock will look flat.
 The bird won’t be able to fully straighten its
leg by itself.
 The bird will likely exhibit pain.
 The joint will become swollen.
 Birds may peep or cry repeatedly.

7.  Shortening and thickening
of long bones.
 Tibia and metatarsus
bowed.
 Shallow trochlea.
 Lateral slipping of tendon.

8.  Lesions
 Analysis of feed ( deficiency of Mn ,Zn).
 Differentiate from –
 Twisted leg
 Infectious synovitis
 Rickets
 Infectious arthritis

9.  Provide starter and grower
diet that contain adequate
amounts of all trace
minerals and vitamins –
especially Mn & choline.
 Most perosis affected flocks
will respond to
supplementation with Mn.

10.  Do not give Ca in excess.
 Repositioning of tendon can be done.
 Wrap the joint area with sports tape to place
the tendon in place.
 Use a hock cushion to protect the hock from
chafing.

11.  Diseases of poultry – M.S. Hofstad
 Poultry diseases – R.F. Gordon & Jordon
 Disease of metabolism – Garfield G.
Duncan.
 Image source – internet-
www.thepoultrysite.com