Clonorchis sinensis eggs are small, ranging in size from 27 to 35 µm by 11 to 20 µm. The eggs are oval shaped with a convex operculum that rests on visible “shoulders” at the smaller end of the egg.

Ova and parasite (O&P) stool examinations for liver fluke eggs can diagnose Clonorchis infection. Stool specimen. Microscopy can identify Clonorchis eggs in stool specimens. Healthcare providers can collect three stool samples, each on a different day, for O&P examination to identify the eggs due to intermittent shedding.

Clonorchis sinensis, the Chinese liver fluke, is a liver fluke belonging to the class Trematoda, phylum Platyhelminthes. It infects fish-eating mammals, including humans. In humans, it infects the common bile duct and gall bladder, feeding on bile.

Aug 4, 2021 · This was a case of clonorchiasis caused by Clonorchis sinensis or opisthorchiasis caused by Opisthorchis viverrini. Morphologic features shown included: Oval shaped, embryonated operculate eggs within the size range for both C. sinensis and O. viverrini (C. sinensis 27-35 µm and 19-30 µm for O. viverrini). Visible opercular “shoulders.”

Dec 19, 2022 · Clonorchis sinensis is a trematode known as the Chinese or Oriental liver fluke. This parasitic infection is most commonly found in Eastern Asia, including Korea, China, and Vietnam, but it can be endemic in far eastern regions of Russia.

Clonorchis sinensis (klo-nor’-kis/sin-en-sis) Transmission: eating contaminted under cooked fish. An infected host sheds Clonorchis ova (eggs) in the feces. If the feces gain access to water, the eggs will develop into miracidium larvae which may be ingested by a freshwater snail.

Morphology of ova The ova of Clonorchis sinensis contain fully developed miracidia and possess prominent opercular shoulders. They are bile stained and measure29 m by 16 m. Pathogenesis Light infections are usually asymptomatic. Acute infections may be characterised by fever,

For Clonorchis and Opisthorchis spp. ova and parasite testing, contact Parasitological diagnosis DPDx. Liver flukes are trematode flatworms, including Clonorchis sinensis; Fasciola hepatica and F. gigantica; Opisthorchis felineus and O. viverrini.

The laboratory diagnosis of Clonorchis infection is made by identifying the characteristic small, pumpkin seed shaped ova in stool specimens. The ovum has a prominent convex operculum that appears to rest on top of the egg.

Clonorchis sinensis infects the liver of humans and other fish-eating mammals; the adults measure about 20 x 4 mm. The ova have an operculum and prominant shoulders (arrow); they are 28-35 by 12-19 µm.