Cases reported "Trematode Infections"

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1/3. Fasciolopslasis--a re-emerging infection in Azamgarh (Uttar Pradesh).

    Fasciolopsiasis is endemic in the far east. In india, there have been a few reports of the infection, prior to the 1990's. We report two cases from Azamgarh district of Uttar Pradesh. Both the cases were from nearby villages where water chestnuts are cultivated. These may be a source of infection. Pigs are commonly observed in these areas and and may be the source of ova. The only missing link is the finding of infected snails. Presence of at least three cases (one reported earlier) in the area indicates the potential for the infection to re-emerge. Further epidemiological studies are needed to analyse the various ecological factors of transmission. Fasciolopsiasis is endemic in china, taiwan, vietnam and thailand. In india, (Fascilopsis buski) infections in man have been reported earlier from Assam, Maharashtra, Tamil Nadu and parts of Uttar Pradesh. However, to the best of our knowledge, no such reports have been made since 1990's. We herewith report two recent cases from district Azamgarh, Uttar Pradesh (U.P.), india. Factors, such as cultivation of water chestnuts, presence of snails as intermediate hosts and pigs as definitive host in this geographical area seem to be suggestive of an endemic focus and thus needs further epidemiological survey for preventive and control measures, at the earliest.
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2/3. Human nanophyetiasis: transmission by handling naturally infected coho salmon (oncorhynchus kisutch).

    The first US case of human nanophyetiasis that does not involve ingestion of raw or undercooked salmonid fishes is reported. The patient worked with highly infected fish. hand contamination with the infectious metacercariae of the digenetic trematode Nanophyetus salmincola (family troglotrematidae) occurred during the handling of fresh-killed, juvenile coho salmon, oncorhynchus kisutch. diagnosis of nanophyetiasis was based on the clinical findings of chronic diarrhea, nausea, abdominal discomfort, and a peripheral blood eosinophilia of 43% and was confirmed on finding characteristic bipolar eggs in a stool specimen. The patient rarely ate seafood products and never ate raw or cold smoked fish. He responded favorably to praziquantel and was asymptomatic after therapy.
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3/3. Intestinal pathology in human metagonimiasis with ultrastructural observations of parasites.

    A human case of intestinal metagonimiasis that was incidentally found during the histological examination of a resected segment of jejunum was described. The small adults trematode of Metagonimus yokogawai were found free in jejunal lumen as well as impacted in intervillous spaces. Histologically intestinal lesions were massive lymphoplasmacytic and eosinophilic infiltration in stroma, erosion of neanby enterocytes, goblet cell depletion and occasional villous edema. Scanning electron microscopy revealed the worm of spatulate appearance with rake-shaped tegumental spines. By transmission electron microscopy, the syncytial integument with dense discoidal bodies, basement membrane muscle cells and subtegumental cells were observed. Characteristic junctional complex was demonstrated between subtegumental and parenchymal cells as well as between parenchymal cells.
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