Human Infections withPseudoterranova cattaniNematodes, Chile

Weitzel, Thomas; Sugiyama, Hiromu; Yamasaki, Hiroshi; Ramírez, Cristián; Rosas, Reinaldo; Mercado, Rubén

doi:10.3201/eid2110.141848

Cited by 38 publications

(34 citation statements)

References 10 publications

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“…The Pseudoterranova decipiens sensu lato, referred to as Pseudoterranova spp., species complex consists of at least 5 sibling species which are genetically but not morphologically distinguishable: P. decipiens sensu stricto, P. azarasi, P. cattani, P. krabbei , and P. bulbosa [ 6 ]. Among these siblings, P. decipiens sensu stricto , P. azarashi, and P. cattani were reported to be the sibling species related to human infection [ 6 , 17 , 23 , 24 ]. Geographic distribution of the 5 sibling species of the P. decipiens complex differs somewhat.…”

Section: Discussionmentioning

confidence: 99%

A case of hepatic anisakiasis caused by Pseudoterranova decipiens mimicking metastatic liver cancer

et al. 2018

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BackgroundAnisakid nematodes (Anisakis spp. or Pseudoterranova spp.) usually infect gastric or intestinal walls, while they rarely infect in extra-gastrointestinal sites of human body. Generally, Anisakis spp. larvae are highly infected in fish intermediate hosts, whereas Pseudoterranova spp. larvae are very rarely infected. To the best of our knowledge, there have been no reports which have documented cases of hepatic anisakiasis caused by Pseudoterranova spp. This report describes the first documented case of hepatic anisakiasis due to infection with Pseudoterranova decipiens and clinical features of the hepatic anisakiasis through literature review.Case presentationThe case was a 28-year-old man with prior history of malignancy who was found to have a hepatic mass mimicking metastatic liver tumor. A new low density area of 20 mm in diameter in liver segment 7 was found on follow-up CT. With suspicious diagnosis of metastatic liver cancer, laparoscopic partial hepatectomy was performed. A pathological examination revealed no evidence of malignancy, but showed necrotic granuloma with eosinophil infiltration and the presence of a larva with Y-shaped lateral cords, which are specific to anisakid larvae. The type of larva was identified as Pseudoterranova decipiens sensu lato using PCR of DNA purified from a fixed granuloma embedded in paraffin.ConclusionThe present report is the first to discuss the case of a patient with hepatic anisakiasis caused by Pseudoterranova decipiens. Hepatic anisakiasis is a potential differential diagnosis for hepatic tumors and genetic identification with the PCR method was reliable for obtaining final diagnosis even when the larvae body in the resected specimen collapses with time.

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Section: Discussionmentioning

confidence: 99%

A case of hepatic anisakiasis caused by Pseudoterranova decipiens mimicking metastatic liver cancer

et al. 2018

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“…In the family Anisakidae, the three genera that cause most zoonoses is Anisakis (Audicana et al, 2002;dos Reis, Sardella and Luque, 2016;Cipriani et al, 2016), Pseutoterranova (Mcclelland, 2002;Arizono et al, 2011;Weitzel et al, 2015) and Contracaecum (Vidal-Martinez et al, 1994;Barros et al, 2004;De Souza et al, 2016). In the Dioctophymatidae family the main zoonotic genus is Eustrongylides (Xiong et al, 2009;Melo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Contracaecum spp. (NEMATODA: ANISAKIDAE) AND Eustrongylides spp. (NEMATODA: DIOCTOPHYMATIDAE) NEMATODE LARVAE WITH ZOONOTIC POTENCIAL FOUND IN TWO FISH SPECIES FROM TRAMANDAÍ RIVER BASIN, SOUTHERN BRAZIL

2019

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Parasitic nematodes can infect both wild and cultivated fish species and may be the source of many diseases. The consumption of raw fish meat in many countries has been the responsible of nematode related zoonosis. Knowing the risk of consumption of contaminated fish by the local communities, the main goal of this paper is to quantify and report the presence of larvae with zoonotic potential of Contracaecum spp. and Eustrongylides spp. found in two exotic fish species from the Tramandaí River Basin in southern Brazil. The sample sites were two lagoons of the basin, the Itapeva lagoon and Palmital lagoon, sampled in the period of April 2018. Forty specimens of Acestrorhynchus pantaneiro and twenty specimens of Trachelyopterus lucenai were examined. A. pantaneiro presented a 58% and 4% prevalence and a mean intensity of 3.17 and 1 for Contracaecum spp. and Eustrongylides spp., respectively. Meanwhile T. lucenai presented a prevalence of 70% and 5% and a mean intensity of 1.92 and 1 of Contracaecum spp. larvae and Eustrongylides spp. larvae, respectively. Although larvae of Contracaeucum spp. are reported only in the literature in experimental infections, they were able to complete their biological cycle in some mammals with certain pathogeneses. However, larvae of Eustrongylides spp. infect humans, as reported in the literature, causing severe damage to the intestinal tract. Knowing that local populations may be at risk, we recommend that all prophylactic measures be taken in relation to fish consumption. This study also contributes to the knowledge concerning the parasitic fauna of the host species studied.

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“…In Latin America, Mercado et al. reported seven cases of the disease in Chile caused by L4 forms of Pseudoterranova decipiens (Ruben Mercado et al., 1997 ; Rubén Mercado et al., 2001 , Mercado et al., 2006 , Weitzel et al., 2015 ), while in 1999, one of the first cases of gastric anisakiasis caused by an Anisakis spp. larva was reported in Peru ( Salazar and Barriga, 1999 ).…”

Section: Introductionmentioning

confidence: 99%

Anisakidae nematodes isolated from the flathead grey mullet fish (Mugil cephalus) of Buenaventura, Colombia

Castellanos

Tangua

Salazar

2017

International Journal for Parasitology: Parasites and Wildlife

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Anisakiasis is a parasitic infection caused by larval stages of nematodes of the genus Anisakis, Pseudoterranova and Contracaecum, of the Anisakidae family. The lifecycle of these nematodes develops in aquatic organisms and their final hosts are marine mammals. However, humans can act as accidental hosts and become infected with infective stage larvae (L3) by consuming raw or undercooked fish or shellfish carrying the parasite. Of this group of parasites, the genus Anisakis is the most studied: its presence in humans is associated with non-specific gastrointestinal symptoms or allergic responses that can trigger anaphylactic shock. The lack of studies in anisakiasis and Anisakis in Colombia has resulted in this infection being little-known by medical practitioners and therefore potentially underreported. The objective of this study was to identify anisakid nematodes in the flathead grey mullet fish (Mugil cephalus), caught by artisanal fishing methods and commercialized in Buenaventura. Morphological identification was carried out by classical taxonomy complemented by microscopy study using the histochemical technique Hematoxylin-Eosin. Nematodes of the genus Anisakis were found in the host M. cephalus. The Prevalence of Anisakis larvae in flathead grey mullet fish was 33%. The findings confirm the presence of Anisakis sp. in fish for human consumption in the Colombian Pacific region, a justification for further investigation into a possible emerging disease in this country.

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Human Infections withPseudoterranova cattaniNematodes, Chile

Cited by 38 publications

References 10 publications

A case of hepatic anisakiasis caused by Pseudoterranova decipiens mimicking metastatic liver cancer

A case of hepatic anisakiasis caused by Pseudoterranova decipiens mimicking metastatic liver cancer

<i>Contracaecum<i> spp. (NEMATODA: ANISAKIDAE) AND <i>Eustrongylides<i> spp. (NEMATODA: DIOCTOPHYMATIDAE) NEMATODE LARVAE WITH ZOONOTIC POTENCIAL FOUND IN TWO FISH SPECIES FROM TRAMANDAÍ RIVER BASIN, SOUTHERN BRAZIL

Anisakidae nematodes isolated from the flathead grey mullet fish (Mugil cephalus) of Buenaventura, Colombia

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