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Choanotaenia infundibulum is a type of tapeworm, specifically known as a cestode that is an internal parasite of chickens. C. infundibulum is a mm ( Choanotaenia infundibulum. Davainea proglottina · Raillietina. Choanotaenia sp. Choanotaenia infundibulum. No uterine capsules, eggs loose in parenchyma. Taxon identifier, Scientific name, Choanotaenia infundibulum. Taxonomy navigation. Up › Choanotaenia. Down Terminal (leaf) node. Common name, -.

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Por favor,activa el JavaScript! Choanotaenia infundibulum is a parasitic tapeworm that has chicken and other domestic and wild gallinaceous birds e.

They are found worldwide, with variable incidence, but are less frequent than other parasitic tapeworms of birds e. Davainea proglottinaRaillietina spp. Other species of the genus Choanotaenia affect mainly wild birds. The reason is that this tapeworm species is not a human parasite.

PoultryDVM Pathogens A-Z | Choanotaenia infundibulum

Adult tapeworms are up to 25 cm long and 3 mm wide. The head scolex is small and has suckers and hooks for attaching to the host’s gut wall.

Usually it has not more than 30 segments proglottidswhich are wider than long. Each segment has its infubdibulum reproductive organs of both sexes i. Each segment has also excretory cells known as flame cells protonephridia. The reproductive organs in each segment have a common opening called the genital pore.


In young segments all these organs are still rudimentary. They develop progressively, which increases the size choanoaenia the segment as it is pushed towards the tail. Otherwise, as other tapeworms, they have neither a digestive tubenor circulatory respiratory systems. They don’t need them because each segment absorbs what it needs directly through its tegument.

The eggs have an ovoid shape, measure about 35×45 micrometers, and contain an embryo oncosphere. Musca domesticalocustsants and termites as intermediate hosts. The gravid segments of adult tapeworms that contain the eggs are shed with the birds’ feces. They infundibulkm motile and migrate quickly odd the feces into the surrounding vegetation. The intermediate hosts ingest the gravid segments, which release the eggs in their gut after digestion.

The eggs then develop to cysticercoids in the body cavity of the intermediate hosts. The birds ingest flies, locusts, ants, etc. The time between infection and shedding of the first eggs prepatent period about 2 to 4 weeks. In most cases affected birds do not show serious clinical signs. Massive infections can cause reduced growth, especially in young birds.

Affected birds can become apathetic and isolated. Diagnosis is done through detection of gravid segments in the feces. Fecal examination must be done on fresh feces, because the gravid segments migrate quickly outside the droppings. Eggs are usually not found in the feces because they remain inside the migrating gravid segments.


After necropsy the adult worms can be seen detected in chaonotaenia intestine.

Choanotaenia infundibulum

Frequent change of the birds’ bedding and keeping it dry can help to avoid infections because it shortens the survival of the gravid segments and the eggs. Measures to avoid contamination of feed with ants or beetles are advisable. Chemical control of flies, ants and termites in poultry houses can be advisable. However, for both economic and ecologic reasons outdoor use of insecticides against ants, beetles or termites is not justified.

There are so far no vaccines against Choanotaenia infundibulum. To learn more about vaccines against parasites of livestock and pets c chownotaenia here. You may be interested in an article in this site on medicinal plants against external and internal parasites.

Buy PDF – Life cycle of the cestode, Choanotaenia infundibulum from Japanese quails

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