Several other Diphyllobothrium species have been reported to infect humans, but less frequently; they include D. pacificum, D. cordatum. PDF | Twenty cases of Dyphillobothrium pacificum (fish tapeworm) infections were prospectively studied to determine whether this tapeworm is. Abstract. Twenty cases of Dyphillobothrium pacificum (fish tapeworm) infections were prospectively studied to determine whether this tapeworm.

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A case of Diphyllobothrium nihonkaiense infection successfully treated by oral administration of gastrografin.

Diphyllobothrium pacificum Infection is Seldom Associated with Megaloblastic Anemia

Diphyllobothriosis, a human disease caused by tapeworms of the genus Diphyllobothriumis the most important fish-borne zoonosis caused by a cestode parasite. Manifestations may include abdominal discomfort, diarrhea, vomiting, and weight loss.

Serum vitamin B12 levels at baseline and 90 days after treatment in 17 patients in Peru infected with Diphyllobothrium pacificum. However, this method is not considered to be the best choice of therapy because the insertion of the duodenal tube is painful, the therapy is expensive, and fluoroscopic images are needed. Eggs released into the stool are unembryonated and possess an operculum on the narrower end Fig.


Molecular methods have been proven to be a powerful tool for the specific identification of causative agents of human disease, but a fast, cheap, and simple molecular-based diagnostic method for the routine laboratory evaluation of clinical samples is still unavailable. We saw no reason to apply molecular biology techniques to identify the worms to the species level in more than three patients because worms detected had the typical morphologic characteristics of D.

The study and diphyllobothroum consent forms were reviewed and approved by the institutional review board of the Universidad Peruana Cayetano Heredia in Lima, Peru. However, embryonated eggs are not present in fresh stool of definitive hosts, and embryonation requires several days in the water Serum vitamin Diphyllobothrimu levels and incidence of tapeworm anemia in a population heavily infected with Diphyllobothrium latum.


The importance of the disease is emphasized by its current recrudescence in some regions of the most developed countries throughout the world.

Phylogenetic relationships within the genus are not well known, because DNA sequences of only a few taxa, especially those infecting humans, are available 11, The following species of Diphyllobothrium were documented as adults from humans in Dipbyllobothrium America: Some species can be differentiated on the basis of the shape and size of the embryonic hooks of the oncosphere 95 Primera encuesta en el Lago Colico.

Rarely, the worms attach in a bile duct One or several of the tape-like proglottid segments hence the name tape-worm regularly detach from the main body of pacifixum worm and release immature eggs in fresh water to start the cycle over again.

CDC – DPDx – Diphyllobothriasis

Z and LC Kamo 73 proposed a reconsideration of the taxonomic status of tapeworms identified as being D. Because humans do not generally eat undercooked minnows and similar small freshwater fish, these do not represent pxcificum important source of infection. Skip directly to search Skip directly to Padificum to Z list Skip directly to navigation Skip directly to page options Skip directly to site content.

Update on the human broad tapeworm genus Diphyllobothriumincluding clinical relevance.

The vagina and the cirrus sac containing the male copulatory organ, a muscular cirrus, open medially into a common genital atrium on the ventral surface, anterior and median to the uterine pore 82 Fig. In some countries previously considered to be disease free Austria, Czech Republic, Belgium, The Netherlands, and Spaindiphyllpbothrium cases have been reported over the last 6 years, which were presumably linked to the consumption of raw imported fish Wicht et al.


Shimane J Med Sci. Due to the changing dietary habits in many parts of the world, autochthonous, or locally acquired, cases of diphyllobothriasis have recently been documented in previously non-endemic areas, such as Brazil.

Vitamin B12 deficiency with pernicious anemia may occur. The remaining body strobila is composed of a high number of segments proglottids [singular, proglottid]each containing one set or, rarely, two sets of genital organs of both sexes 36 Fig. Most Diphyllobothrium species are characterized by a relatively low specificity at the adult stage, which implies that humans may become infected with parasites normally maturing in carnivore mammals or even in fish-eating birds The characterization of the complete mitochondrial genomes of D.

Paraphyly of the Pseudophyllidea Platyhelminthes: The adult worm is composed of three fairly distinct morphological segments: In such circumstances, people often retain their dietary habits, which is indispensable for the epidemiological cycle of the disease 39 Most patients were diphyl,obothrium during fiphyllobothrium region-wide cysticercosis control program in northern coastal Peru.

Distinction between Diphyllobothrium nihonkaiense and Diphyllobothrium latum by immunoelectrophoresis. Coprological study on intestinal helminths in Swiss dogs: The coracidium penetrates the intestinal wall of the copepod and develops into the procercoid, which lacks a differentiated anterior end with attachment organs scolex but possesses a posterior appendage cercomer that contains six embryonic hooks When molecular analysis PCR is made directly from fecal samples, a preliminary concentration of eggs formol-ether concentrationwithout the addition of formalin, is suggested to obtain sufficient amounts of DNA Fecal examinations were performed by a microscopist in a local laboratory, and results were confirmed by a second microscopist in a reference laboratory.