CDC - DPDx - Hymenolepiasis
Hymenolepis nana is the most common cause of all cestode infections, and is encountered worldwide. In temperate areas its incidence is higher in children and institutionalized groups. Hymenolepis diminuta, while less frequent, has been reported from various areas of the world.
About Hymenolepiasis (Dwarf Tapeworm) - CDC
Jul 11, 2024 · Key points. Hymenolepiasis is caused by a parasitic tapeworm, also known as the "dwarf tapeworm." A parasite is an organism (a living thing) that lives on or inside another organism. People can get dwarf tapeworm by consuming food or water contaminated by dwarf tapeworm eggs.
Clinical Overview of Hymenolepiasis (Dwarf Tapeworm) - CDC
Dec 15, 2023 · Key points. Hymenolepiasis is caused by a parasitic worm, also known as the "dwarf tapeworm." People can get dwarf tapeworm by consuming food or water contaminated by dwarf tapeworm eggs. Dwarf tapeworm occurs worldwide, most often in people living in areas with poor sanitation and people living in institutional settings.
CDC - DPDx - Diagnostic Procedures - Stool Specimens
Nuclei of trophozoites are visible in formalin-fixed material but are usually not sufficiently distinctive for species identification. Chromatoid bodies are more easily seen in unstained wet mounts than in iodine preparations.
CDC - DPDx - Fleas - Centers for Disease Control and Prevention
Many species of fleas can feed on humans. The human flea, Pulex irritans, is less-commonly seen these in industrialized areas. This species is not an effective vector of disease but can serve as an intermediate host for the cestodes Dipylidium caninum and Hymenolepis nana.
CDC - DPDx - Taeniasis
Taenia saginata taeniasis produces only mild abdominal symptoms. The most striking feature consists of the passage (active and passive) of proglottids. Occasionally, appendicitis or cholangitis can result from migrating proglottids. Taenia solium taeniasis is less frequently symptomatic than Taenia saginata taeniasis.
CDC - DPDx - Dipylidium caninum - Centers for Disease Control …
Dipylidium caninum is a common tapeworm of dogs and cats, but is occasionally found in humans. It has many common names including the “flea tapeworm”, “cucumber tapeworm”, and “double-pored tapeworm”.
Details - Public Health Image Library (PHIL)
This photomicrograph reveals some of the ultrastructural details exhibited at the proximal end of the parasitic rat tapeworm, Hymenolepis diminuta. You are looking at the H. diminuta scolex, and can see the two suckers that allow it to secure itself on the host’s intestinal mucosa.
CDC - DPDx - Case #521 - August 2020
Dec 9, 2020 · This was a case of hymenolepiasis caused by Hymenolepis diminuta. Diagnostic morphologic features shown in the images included: eggs within the size range for H. diminuta. presence of an inner oncosphere without polar filaments in the space between the oncosphere and the outer shell/membrane (which would be present in the smaller eggs of H. nana).
CDC - DPDx - Echinococcosis
Human echinococcosis (hydatidosis, or hydatid disease) is caused by the larval stages of cestodes (tapeworms) of the genus Echinococcus. Echinococcus granulosus (sensu lato) causes cystic echinococcosis and is the form most frequently encountered. Another species, E. multilocularis, causes alveolar echinococcosis, and is becoming increasingly ...