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Category: Food Microbiology; Applied and Industrial Microbiology
Helminths Acquired from Finfish, Shellfish, and Other Food Sources, Page 1 of 2
< Previous page | Next page > /docserver/preview/fulltext/10.1128/9781555818463/9781555816261_Chap27-1.gif /docserver/preview/fulltext/10.1128/9781555818463/9781555816261_Chap27-2.gifAbstract:
A variety of human helminthic infections can be acquired through the consumption of food products from infected animals and plants, through the accidental ingestion of infected invertebrates in foodstuffs or drinking water, or through inadvertent fecal contamination by humans or animals. This chapter discusses helminths acquired from finfish and shellfish. The majority of human infections acquired in the United States have been associated with dishes prepared at home, which suggests that the skill and care of the food handler and the selection of fish prepared for consumption may be important risk factors. It then talks about helminths acquired from vegetables. Fresh vegetables grown in areas where night soil (human waste) is used as fertilizer are frequently contaminated and, thus, may facilitate transmission of any of a number of geohelminths. The chapter also discusses helminths acquired from invertebrates in drinking water, and helminths acquired from other invertebrates including snails, ants, fleas and beetles. Diagnosis of infection is presumptive and usually not confirmed until the worm is removed and identified through histological sectioning. Inadequate washing of produce or poor hygiene among food handlers can result in a variety of helminthic infections. A variety of geohelminth species utilize the fecaloral route for person-to-person and animal-to-person transmission.
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Anisakis embedded in the human gastric mucosa as visualized by gastroscopy. (Photograph contributed by Tomoo Oshima; illustration courtesy of the Armed Forces Institute of Pathology, Washington, D.C., AFIP 76-2118.) doi:10.1128/9781555818463.ch27f1
Anisakis embedded in the human gastric mucosa as visualized by gastroscopy. (Photograph contributed by Tomoo Oshima; illustration courtesy of the Armed Forces Institute of Pathology, Washington, D.C., AFIP 76-2118.) doi:10.1128/9781555818463.ch27f1
Transverse section of larval Capillaria philippinensis embedded in human intestinal glands. Magnification, ×280. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 69-1066.) doi:10.1128/9781555818463.ch27f2
Transverse section of larval Capillaria philippinensis embedded in human intestinal glands. Magnification, ×280. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 69-1066.) doi:10.1128/9781555818463.ch27f2
Arrows show Dracunculus larvae within the body cavity of the intermediate host, Cyclops. Magnification, ×85. (Specimen contributed by E. L. Schiller, Johns Hopkins University School of Public Health, Baltimore, MD; illustration courtesy of the Armed Forces Institute of Pathology, AFIP 68-4629.) doi:10.1128/9781555818463.ch27f3
Arrows show Dracunculus larvae within the body cavity of the intermediate host, Cyclops. Magnification, ×85. (Specimen contributed by E. L. Schiller, Johns Hopkins University School of Public Health, Baltimore, MD; illustration courtesy of the Armed Forces Institute of Pathology, AFIP 68-4629.) doi:10.1128/9781555818463.ch27f3
A sparganum removed from a subcutaneous nodule in the inguinal region. Magnification, ×3.8. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 70-7392.) doi:10.1128/9781555818463.ch27f4
A sparganum removed from a subcutaneous nodule in the inguinal region. Magnification, ×3.8. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 70-7392.) doi:10.1128/9781555818463.ch27f4
Numerous adult Ascaris lumbricoides worms obstructing the jejunum of a 13-year-old Zairian. Magnification, ×2.1. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 72-13204.) doi:10.1128/9781555818463.ch27f5
Numerous adult Ascaris lumbricoides worms obstructing the jejunum of a 13-year-old Zairian. Magnification, ×2.1. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 72-13204.) doi:10.1128/9781555818463.ch27f5
Trichuris trichiura adult worms. The photograph shows the slender anterior ends threaded beneath the colonic epithelium. Magnification, ×3.3. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 69-3583.) doi:10.1128/9781555818463.ch27f6
Trichuris trichiura adult worms. The photograph shows the slender anterior ends threaded beneath the colonic epithelium. Magnification, ×3.3. (Illustration courtesy of the Armed Forces Institute of Pathology, AFIP 69-3583.) doi:10.1128/9781555818463.ch27f6
Sources of infection with some foodborne helminths of humans
Sources of infection with some foodborne helminths of humans