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Respiratory Parasitic Infections - Pathology (view source)

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===[[Trichostrongyloidea|''Dictyocaulus arnfieldi'']]===

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*Found in smaller [[Bronchi and Bronchioles Inflammatory - Pathology#Infectious causes of bronchitis or bronchiolitis|bronchi]]

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*Cause of chronic cough

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*Donkeys are a reservoir mostly without any clinical signs

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*Gross pathology:

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**Raised areas of over-inflated pulmonary tissue surrounding small bronchus, containing worms and mucopurulent exudate

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**Hyperplastic bronchial epithelium

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**Coiled worms in small bronchi

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**Peribronchial cuffing

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**In caudal lung lobes

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*Histologically

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**Central coiled parasites and associated chronic catharral bronchitis

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**Goblet cell hyperplasia

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**Lymphoid cell infiltration

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*In [[Hindgut Fermenters - Horse - Anatomy & Physiology|horses]], the worms usually fail to achieve sexual maturity

===[[Coccidia|''Besnoitia bennetti'']]===

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