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Runting Stunting Syndrome (RSS) is a condition in poultry characterized by delayed body weight gain due to pathological issues in the digestive tract, pancreas, thyroid or sepsis. It is commonly called "helicopter disease" due to the abnormally large and protruding wing feathers seen in affected chickens. RSS can be caused by enteric viruses, bacteria, protozoa or deficiencies in vitamins and minerals. The pathogenesis involves lesions in the digestive tract leading to malabsorption and malnutrition, or lesions in the pancreas or thyroid impacting growth. Clinical signs include distended abdomen, dilated intestines, gaseous intestinal content, and atrophy of the intestines, pancreas and thyroid. RSS

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Usamah El-habib
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378 views19 pages

RSS

Runting Stunting Syndrome (RSS) is a condition in poultry characterized by delayed body weight gain due to pathological issues in the digestive tract, pancreas, thyroid or sepsis. It is commonly called "helicopter disease" due to the abnormally large and protruding wing feathers seen in affected chickens. RSS can be caused by enteric viruses, bacteria, protozoa or deficiencies in vitamins and minerals. The pathogenesis involves lesions in the digestive tract leading to malabsorption and malnutrition, or lesions in the pancreas or thyroid impacting growth. Clinical signs include distended abdomen, dilated intestines, gaseous intestinal content, and atrophy of the intestines, pancreas and thyroid. RSS

Uploaded by

Usamah El-habib
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Runting Stunting Syndrome (RSS)

Delayed body weight gain due to any


pathological
p g condition of digestive
g tract,,
pancreas, thyroid and septicemia
RSS = Helicopter Disease

Agent
Enteric Viral : Reovirus, adenovirus, arena virus, rotavirus,
calicivirus, corona virus, toga virus
Enteric Bacterial : Salmonela spp, E coli, Clostridium spp
Protozoa : Eimeria sp,
sp Cryptosporidium sp
Deficiency vitamin and mineral : Thiamine, riboflavin, asam
pantothenic acid , Deficiency niasin
The growing primary wing feathers are abnormally big for
chickens with retarded growth, they protrude at various
angles so the disease is termed “helicopter
angles, helicopter disease"
disease .
One-day old chickens are the most susceptible to the
infection.
Patogenesis RSS
1. Agents → digestive tract lesion →
malabsorption → disturbance of nutrition
absorption → malnutrition → stunted
2. Agents
g → digestive
g tract lesion → septisemia→
p
pancreas lesion→ maldigestion → malabsorption
→ Malnutrition→ stunted

3. Agents → Thyroid lesion → growth hormone


hyposecretion → stunted

4. Agents
g → immunosupresion
p → septicemia
p
→ stunted
Distended Abdomen
Proventriculus dilatation
Gaseous Intestinal Content

patoipb U/116/00
The small intestine is pale, dilated and contain indigested
forage
Gaseous Intestinal Content
Atrophy Intestinal Vili

patoipb
p p U24/03
Catarrhal Enteritis

patoipb U35/03
Atrophic
At hi
Pancreas

patoipb U/163/00
Atrophic Pancreas
Atrophic Pancreas

patoipb U35/03
Chronic Pancreatitis

patoipb U24/03
The thyroid glands are
located on each side of
the neck, medial to the
jugular vein and cranial
to the origin of the
subclavian and common
carotid arteries.

thyroid
y

parathyroid
Perihepatitis and pericarditis in concurrent infections
mycoplasmosis and colibacillosis,
The Effect of RSS
Hematopoietic System → anemia (deficiency of
Fe, vit B 12) ; hemorrhage (deficiency of vit K)
Musculosceletal System → Bone
malformation (deficiency of Ca, vit D, Mg)
Endocrine System → infertility, metabolic
disturbance
Skin → purpura and ptechie (deficiency of vit K);
Edema (deficiency protein) ; dermatitis and
hyperkeratinisation (deficiency vit A)
Nervus System → peripheral neuronopathy
(deficiency vit A and B12)
References
Atlas of Pathology.
Pathology Disease of poultry http://www.thepoultrysite.com
http://www thepoultrysite com
Guy, J. S. 1998. Virus infections of the gastrointestinal tract of poultry.
Poultry Sci. 77:1166-1175.
Rebel, J. M. J., F. R. M. Balk, J. Post, S. Van Hemert, B. Zekarias and N.
Stockhofe. 2006. Malabsorption syndrome in broilers. World’s Poultry
Sci. J. 62:17-29.
Rebel, J. M. J., J. T. P. van Dam, B. Zekarias, F. R. M. Balk, J. Post, A.
Flores Minambres and A. A A.
A H.H M.
M ter Huurne.
Huurne 2004.
2004 Vitamin and trace
mineral content of feed of breeders and their progeny: Effects of
growth, feed conversion and severity of Malabsorption syndrome of
broilers. British Poultry Sci. 45(2):201-209.
Sh i F.,
Shapiro, F I.I Nir
Ni and d D.
D Heller.
H ll 1998.
1998 Stunting
St ti syndrome
d i broilers:
in b il Eff t
Effect
of stunting syndrome inoculum obtained from stunting syndrome
affected broilers, on broilers, leghorns and turkey poults. Poultry Sci.
77:230-236.
30 36
Zalvala, G. and H. Sellers. 2005. Runting-stunting syndrome. The
Informed Poultry Professional Issue 85:1-4. http://www.vet.uga.edu

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