Paramphistomum cervi (P. gotoi)

Paramphistomum cervi (P. gotoi): Morphology, Hosts and Identification

Paramphistomum cervi, commonly known as the rumen fluke or conical fluke, is a trematode parasite of ruminants. It primarily inhabits the rumen of cattle, buffaloes, sheep, and goats. Although adult flukes are generally considered less pathogenic, immature stages can cause severe enteritis and significant economic losses in livestock.

• Common Name: Rumen Fluke, Conical Fluke
• Host: Cattle, buffaloes, sheep, and goats
• Location: Rumen
• Intermediate Host: Snails of the genera Bulinus and Planorbis
• Distribution: Widely distributed in many tropical and subtropical regions

Morphology

The following morphological features are commonly used for the identification of Paramphistomum cervi in veterinary parasitology:

• Paramphistomum cervi (P. gotoi) measures 0.5–1.1 × 0.2–0.4 cm.
• The flukes are pear-shaped or conical in appearance.
• The body is elongated with blunt ends.
• The dorsal surface is convex, while the ventral surface is concave.
• The ventral pouch and cirrus sac are absent.
• The ventral sucker is large and situated at the posterior end in a subterminal position.
• The intestinal caeca are coiled (3–4 coils) and terminate approximately at the level of the middle of the ventral sucker.
• The testes are lobed and arranged in tandem.
• The genital sinus encloses the genital opening in the anterior third of the body.

For information on the general life cycle, epidemiology, pathogenesis, histopathological lesions, clinical signs, diagnosis, treatment, and control of amphistome infections, refer to our detailed article on Amphistomes (Rumen Flukes). The principles discussed in that article are broadly applicable to infections caused by Paramphistomum cervi (P. gotoi).