Ascaridia Galli (Roundworm Large) ...

Ascaridia Galli (Roundworm Large) Heavy Infection in Laying Hens

Ascaridia Galli (Roundworm Large) Heavy Infection in Laying Hens

Observed Clinical Signs Happenings

Mortality

  • Low mortality or increases gradually

Dead birds

  • Skinny body  (Poor body fleshing condition)

Body Parts (Neck, wings, breast, abdomen, shanks, legs, hocks, feet, joints, vent, and skin, abnormalities), skinny body, retarded growth, weight depression

  • Retarded growth
  • Weight depression
  • Most of Ascaridia galli infection is a subclinical condition

Internal Egg contents defects

  • Yolk colour variable
  • The worm inside the egg detected by candling, although this is most difficult with brown-shelled eggs.

Ascaridia Galli (Roundworm Large) Heavy Infection in Laying Hens show, exhibit, or manifest any of the following clinical signs happenings:

Observed Clinical Signs Happenings*

ALWAYS

NEVER

SOMETIMES

Egg drop

 

  •  

 

Mortality above the standard

 

 

  •  

Low mortality or increases gradually

  •  

 

 

High mortality or increases rapidly

 

  •  

 

Dead birds

 

 

  •  

Good bodily condition

 

  •  

 

Dead birds in poor bodily  condition

  •  

 

 

Visibly sick birds

 

  •  

 

Flock behaviour activity change

 

  •  

 

Droppings abnormalities

 

  •  

 

Respiratory abnormalities

 

  •  

 

Neurological Nervous

 

  •  

 

Lameness or unusual movements, incoordination, reluctance to move

 

  •  

 

Eyes abnormalities

 

  •  

 

Head: Comb Wattles Face Nostrils Sinuses Mount Beak Earlobes (except eyes)

 

 

 

Body Parts (Neck, wings, breast, abdomen, shanks, legs, hocks, feet, joints, vent, and skin, abnormalities), skinny body, retarded growth, weight depression

 

 

  •  

Feathers abnormalities

 

  •  

 

Feed Consumption Changes

 

  •  

 

Diet or Feed Changes (Recent Feed delivery, Recent formulation /diet, Other silo or improper storage, another feed brand)

 

  •  

 

Shell quality

 

  •  

 

Internal Egg quality

 

 

  •  

*Most of the times Ascaridia galli  infection is a subclinical condition

*Chickens infected with a large number of ascarids suffer retarded growth and increased mortality

*Sometimes has not been observed or measured the internal egg quality changes yet or inadequacy of monitoring systems, and even the course time of the disease

 

 

Causing Agents
Parasitic intestinal track infection of nematode. Worm parasites. Ascaridia galli.
Affected Systems/Organs
Reproductive system. Intestinal tract.
Spread
Fecal-oral Cycle. The parasites may be transported by grasshoppers and earthworms and are resistant to environmental. A. galli reportedly contain and transmit avian reovirus
Mainly Affects
Liveability and egg quality
Solution
Use of modern anthelminthics to effectively kill both larve and adult worms. Removal of droppings from feeders and drinkers and pasture rotation and regular anti-parasite treatment (as locally approved), especially in young birds and Free range production system. The nutritional state of the bird also influence the development of immunity. Diets high in vitamins A and B (complex) increase the fowl's resistance to A. galli. Increasing levels of dietary calcium and lysine decreased the length and number of worms recovered.
Suggested Actions
  • Can be confirmed with clinical signs and gross lesions
  • Technical assistance recommended
  • Can be managed with feed additives, off-the-shelf medications
  • Diagnosis should be confirmed with rapid assays and/or a certified laboratory
  • Veterinary intervention is recommended

Impact on Egg quality

1

Impact on Liveability

1


Impact on Production

0

Overall Economic Impact

1



David E. Swayne. 2013.  Diseases of Poultry 13th Edition. page 1121

Y.M. Saif.2008.Disease of Poultry. 12th Edition. page 1038

Paul McMullin. 2004. A pocket Guide to Poultry Health and Disease. First Edition. page 180

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