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�

Dr. Pallav Shekhar

Asstt. Professor

Veterinary Medicine

Oesophagostomosis�

UNIT-6

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Oesophagostomosis�

  • All forms of animal except horses harbour oesophagostomum.

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  • It produces disease k/a nodule worm disease or pimply gut or knotty gut

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Etiology

    • O. Columbianum
    • O. venulosum
    • O. asperum

Sheep and goat

    • O. Radiatum
    • O. Venulosum

Cattle

    • O. dentatum
    • O. quadrispinutatum

Pig

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Life cycle

  • Oesophagostomum spp. Are generally host specific but O. venulosum produces disease both in cattle and sheep.

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Life cycle

Eggs

faces

L1 & L2

L3 stage infective

Ingestion

Larva invade in intestinal wall

Nodule formation

Lumen of intestinal wall at the 4th larval stage

Adult worm

Egg laying

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Epidemiology

  • Prevalence is highest in warmer temperature or sub tropical climate with summer rainfall.

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Pathogenesis

Nodule formation in intestine

Anorexia

Mucoid diarrhoea

Loss of wt

Anaemia

Hypoprotenemia

Death

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Clinical findings

Dark green faces

Severe diarrhea in heavy infestation

In chronic cases faces semisolid with excess mucous and occasionally blood

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Necropsy findings

Nodules found at all level of intestine

Size of the nodule vary from upto 6mm and may contain green pasty or yellow brown calcified material

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Treatment

As other nematodes

Thiabendazole @ 50mg/kg

Albendazole @ 10 mg /kg

Tetramisole HCL 15mg/kg