Biliary parascarosis in a foal

Sazmand, Alireza; Yavari, Morteza; Babaei, Mohammad; Nourian, Alireza; Otranto, Domenico

doi:10.1002/vms3.1087

Cited by 2 publications

(1 citation statement)

References 40 publications

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“…There are only a few reports of ascarid migration into host bile ducts in the literature, one by Toxocara vitulorum in a buffalo [ 30 ] and a more recent report of adult Parascaris sp. in the biliary tree of a foal [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Hepatobiliary Ascariasis in a Piglet

Tamponi,

Cavallo,

Dessì

et al. 2024

Acta Parasit.

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Purpose Ascariasis caused by the helminth Ascaris suum is the most common parasitosis of swine worldwide and it may involve all age categories of pigs. The present study reports an unusual localization of A.suum worms in the biliary system of a piglet slaughtered for human consumption. Methods The liver was subjected to ultrasound scan and pathological examination. The isolated worms were morphologically examined and the DNA was extracted for the molecular identification of the species involved. Results A total of 43 preadult nematodes were found within the gallbladder and the bile ducts. Parasites were morphologically identified as belonging to the genus Ascaris and molecularly as A. suum. At gross examination, the liver was moderately enlarged, with the bile ducts severely dilated. A chronic inflammatory infiltrate was noted, often centered around ectatic bile ducts (up to 5 mm in diameter), lined by hyperplastic epithelium and filled with sections of nematodes. The worm sections showed smooth cuticle, coelomyarian musculature, and an intestinal tract lined by columnar, uninucleated cells within a pseudocoelom. The ex vivo ultrasonographic examination of the liver allowed the visualization of several nematodes in the bile duct lumen and could be suggested for in vivo diagnosis. Unfortunately, the absence of the intestine did not allow to define the pathogenesis of the infection. Conclusion Although, given the unusual nature of this finding, it is difficult to identify predisposing factors for this A. suum localization, it suggests that ascariasis should be considered in the differential diagnosis of pigs with hepatobiliary disease.

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Section: Discussionmentioning

confidence: 99%

Hepatobiliary Ascariasis in a Piglet

Tamponi,

Cavallo,

Dessì

et al. 2024

Acta Parasit.

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Biliary parascarosis in a foal

Sazmand

Yavari

Babaei

et al. 2023

Veterinary Medicine & Sci

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Migration of Ascaris lumbricoides through the papilla of Vater in humans, and entry into the biliary tree, is well-recognised. Ascaris suum and Toxocara vitulorum have been recovered from the liver of swine and buffalo. We necropsied a Persian Kurdish filly at age 6 months, weighing ∼100 kg. Death evidently was caused by oleander (Nerium oleander) intoxication. An 8-cm adult male Parascaris was found at the lobar-left hepatic bile duct junction. We suggest that the nematode entered anteriorly into the hepatic tree, via the duodenum, major duodenal papilla, bile duct, left hepatic duct and finally the lobar duct. Considering the brief 4-h elapsed time between death and necropsy, and the 18-cm distance from the major duodenal papilla to the location of the parasite, we conclude that entry into the biliary tree likely occurred ante-mortem. We advise consideration of Parascaris infection in differential diagnosis of equine hepatic and pancreatic dysfunction.

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Biliary parascarosis in a foal

Cited by 2 publications

References 40 publications

Hepatobiliary Ascariasis in a Piglet

Hepatobiliary Ascariasis in a Piglet

Biliary parascarosis in a foal

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