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Respiratory System Diseases, Ruminants

The common clinical signs and pathology of parasitic infections of the respiratory system of ruminants are summarized in Table 1.
Table 1 Parasites affecting the respiratory system of ruminants (according to Vercruysse and De Bont)

Parasite

Type

Host

Location

Clinical presentation

Principal lesions

Protozoa

Sarcocystis spp.

2

Ruminants

Vascular endothelium

Anorexia, fever, weight loss, anemia and dyspnea

Lungs: mild interstitial pneumonitis and vasculitis

Trematoda

Schistosoma nasale

1

Cattle

Nasal mucosal veins

Muco-purulent discharge, dyspnea, snoring

Granulomas in nasal mucosa

Nematoda