Heterakis Gallinarum: Poultry Ascarid Worm
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Dr. AJIT KUMAR
Department of Veterinary Parasitology
Bihar Veterinary College
Bihar Animal Sciences University
Patna-800014
Heterakis
gallinarum
(Poultry
Ascarid worm)
Heterakis gallinarum
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General Characters:
o
Marked
sexual dimorphism
.
Males are smaller and shorter,
about 9 mm in length, with a
unique bent tail whereas
Females are stouter and longer
about 13 mm in length, with a
straight tail end.
o
Oesophagus has large
posterior bulb and spicules
are unequal in length
o
Male worm has 12 pairs anal
papillae.
o
Egg
is
oval
with
smooth
shells
Heterakis gallinarum
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:
o
Similar to
Ascaridia galli
.
o
Infective stage:
egg
containing 2
nd
stage larvae.
o
Transport host: Earthworm
Transmission:
Heterakis gallinarum
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Pathogenesis:
Heterakis gallinarum
Worms are usullay non-pathogenic but it’s important
role
is transmission of
Histomonas
meleagridis
(protozoa).
Histomonas
meleagridis
(protozoa) causes entero-
hepatitis or black head disease in
turkey.
Protozoa remain safe inside the infective eggs of the
nematode against the lethal effect of the anterior part of
the digestive tract of the bird
on
ingestion of eggs by them
and reach caeca in viable
state.
Worms
cause
nodular
typhlitis
.
Clinical signs:
Nodular typhalitis,
anaemic, emaciation
and
diarrhoea.
Heterakis gallinarum
Diagnosis :
o
On the basis of Clinical signs
o
Microscopic faecal examination
o
Small adult worms are found in the
caeca during necropsy
Heterakis gallinarum
Treatment
Heterakis gallinarum
Fenbendazole
Phenothiazine @ 0.5- 1 gm/ bird are
effective.
Control:
Heterakis gallinarum
Treatment of infected birds
Regular deworming
Regular cleaning of floor ,
feeding and
watering utensils etc.
Segregation of adult and young birds
THANK
YOU
Heterakis gallinarum, a caecal worm found in domestic and wild birds, plays a role in transmitting Histomonas meleagridis, causing diseases like blackhead in turkeys. Clinical signs include anaemia, diarrhoea, and emaciation. Diagnosis involves microscopic examination, and treatment with fenbendazole or phenothiazine is effective.
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Presentation Transcript
Heterakis gallinarum (Poultry Ascarid worm) Bihar Animal Sciences University | Dr. AJIT KUMAR Department of Veterinary Parasitology Bihar Veterinary College Bihar Animal Sciences University Patna-800014
Heterakis gallinarum Final Hosts Final Hosts : Domestic & wild birds : Domestic & wild birds Location: Caecum Location: Caecum Caecal Caecal worm of poultry worm of poultry
Heterakis gallinarum General Characters: Marked Males are smaller and shorter, about 9 mm in length, with a unique bent Females are stouter and longer about 13 mm in length, with a straight tail end. sexual dimorphism. o tail whereas o Oesophagus posterior bulb and spicules are unequal in length has large o Male worm has 12 pairs anal papillae. o Egg is oval with smooth shells
Heterakis gallinarum Life Life- -cycle cycle: : o Similar to Ascaridia galli. o Infective containing 2nd stage larvae. stage: egg o Transport host: Earthworm Transmission: Transmission Transmission through 1. I Ingestion of infective egg ngestion of infective egg containing containing L L2 water water 2. Eggs are sometimes ingested by earthworms, which may act as transport host. So, ingestion of earthworm containing L2 larva 1. 2 with food or with food or
Heterakis gallinarum Pathogenesis: Worms are usullay non-pathogenic but it s important role is transmission of Histomonas meleagridis (protozoa). Histomonas meleagridis hepatitis or black head disease in turkey. Protozoa remain safe inside the infective eggs of the nematode against the lethal effect of the anterior part of the digestive tract of the bird on ingestion of eggs by them and reach caeca in viable state. Worms cause nodular typhlitis. (protozoa) causes entero-
Heterakis gallinarum Clinical signs: Nodular anaemic, and diarrhoea. typhalitis, emaciation
Heterakis gallinarum Diagnosis : o On the basis of Clinical signs o Microscopic faecal examination o Small adult worms are found in the caeca during necropsy
Heterakis gallinarum Treatment Fenbendazole Phenothiazine @ 0.5- 1 gm/ bird are effective.
Heterakis gallinarum Control: Treatment of infected birds Regular deworming Regular cleaning of floor , feeding and watering utensils etc. Segregation of adult and young birds
THANK YOU
