Ectoparasitism in sheep and goat

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Ayesha siddque smrity. Level-4, Sem-1. Roll no. 27 . Reg no: 01407. Session:2006-2007. Faculty of Animal Science and Veterinary Medicine Patuakhali Science and Technology University Khanpura, Babugonj, Barisal .

Ectoparasitism in Sheep & Goat:

Ectoparasitism in Sheep & Goat


Introduction: Parasitism is a type of symbiotic relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host . The infestation of the animal caused by the ectoparasite lice, ticks, mites is called ectoparasite.

Etiology: :

Etiology : Biting lice of mammals Sucking lice of mammals Biting lice of birds Mite: Burrowing mite Non burrowing mites Tick: Boophilus sp. Rhipicephalus sp. Hemaphysalis sp. Dermacentor sp. Amblyomme sp. Aponomme

Predisposing factor::

Predisposing factor: The body is covered by long hair. Closer contact of animal to parasites. Light intensity. Reduce body surface temperature of the animal which is optimum temperature of ectoparaste. Unhygienic condition. Lack of proper hygienic management

Predisposing factor::

Predisposing factor: They can suck blood easily from host. Lack of proper nutrition of animal. Young animal are more susceptible. Seasonal prevalency. Wet condition. In case of open wound. If the animal become uncleaned

Effect of ectoparasitism on their host::

Effect of ectoparasitism on their host: In case of lice In case of mites In case of tick Cause irritation on their hosts and hosts become restless cause damage of feathers, hairs or wool and skin. Formation of hair balls in the stomach Suck blood &cause anemia Decrease production of egg and milk The mite give severe irritation to their hosts skinSuck blood voraciously causing anaemia They damage the quality of hides and skins Wool damage in sheep. Allergic reaction. Producetion loss. The tick bite cause attracton of blow flies causing myiasis and secondary bacterial infection. Sucking of blood. Transmission of diseases- Babesiosis , Anaplasmosis , Thiloriosis . Tick paralysis. Tick toxicosis

Clinical findings::

Clinical findings: Incase of lice Incase of mite In case of tick Animal became restless. Injury due to scratching . Decreased production Anaemia dermatitis . Suffer from malnutrition. Alopecia Formation of hair ball The crust on skin surface Erythrema and papules formation. Pruritis and alopecia. Strong sour odour is a notable feature. Loss of hair and scrating and rubbing. Pustules or abscess found. Pea shaped nodules containing casious mass and large amount of mite. Mange is occurred There are no obvious signs of tick infection other than the presence of the parasites and the local skin reaction to their bites


Diagnosis: In lice infection In mite infection In case of tick Diagnosis is easily made by finding the lice or by detecting the eggs or nits on hairs or feather . By clinical sign. Paraclinical examination Conformatory diagnosis by identification of the mites . The adults ticks, particularly the engorged females, are easily seen on skin usually small inflamed nodules are also seen


Treatment: In case of ectoparasitism caused by lice, tick and mite we can treat the animal by – Ivermectin (Vermic®, Techno. Amectin®, Acme)@0.2mg/bwt. S/C. Carbaryl Carbamate Cypermeturin Acaricides

Prevention and control::

Prevention and control : In case of lice In case of mite In case of tick Proper hygienic management . Spraying or dipping the animals by using insecticides. Healthy animal should be kept away from infected animals to parent spreading lice. In poultry, spraying of carbaryl and toxaphene , hexa chlorocyclohexane and malathion . The nest of the birds should be removed and made houses free from any cracks. Individual birds may be treated with acaricide such as carbaryl or pyrethrum and gamma. use of chemical acaricides applied either by total immersion in a dipping bath or in the form of spray

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