Heavy Hymenolepis nana Infection Possibly Through Organic Foods: Report of a Case

Abstract

We encountered a patient with heavy Hymenolepis nana infection. The patient was a 44-year-old Korean man who had suffered from chronic hepatitis (type B) for 15 years. A large number of H. nana adult worms were found during colonoscopy that was performed as a part of routine health screening. The parasites were scattered throughout the colon, as well as in the terminal ileum, although the patient was immunocompetent. Based on this study, colonoscopy may be helpful for diagnosis of asymptomatic H. nana infections.

Morphological, Molecular, and Pathological Appraisal ofHymenolepis nana(Hymenolepididae) Infecting Laboratory Mice (Mus musculus)

“…Remarks: The recovered cestode parasite was compared with those collected from different regions: it most closely resembled H. nana previously described by Lapage (1951), Roberts & Janovy (2000), Schantz (2006), Richard (2008), Schmidt et al (2009), Sadaf et al (2013), and Kim et al (2014), since all of them had generic characteristics, except that reported by Mayhew (1925), which indicated that the testes were a compound structure. The parasite is also substantially similar to H. roudabushi due to the serrate strobila margins as described by Macy & Rausch (1946).…”

“…The evaginated juveniles were pushed out into the intestinal lumen after eosinophilic infiltration and possible physical pressure (days 4-5), where they matured into adult worms within 7 days (day 12). Prevalence and intensity: 20 out of 50 (40%) specimens were infected, with a total number of 243 cestodes Remarks: The recovered cestode parasite was compared with those collected from different regions: it most closely resembled H. nana previously described by Lapage (1951), Roberts & Janovy (2000), Schantz (2006), Richard (2008), Schmidt et al (2009), Sadaf et al (2013), and Kim et al (2014), since all of them had generic characteristics, except that reported by Mayhew (1925), which indicated that the testes were a compound structure. The parasite is also substantially similar to H. roudabushi due to the serrate strobila margins as described by Macy & Rausch (1946).…”

Heavy burden of intestinal parasite infections in Kalena Rongo village, a rural area in South West Sumba, eastern part of Indonesia: a cross sectional study

“…It implies to the poor sanitation because the soil was contaminated with parasite eggs from human waste or food supplies were contaminated with fleas, then eaten by human. As H. nana is one of a few parasites that can cause autoinfection and can persist for years, this also can be a potential problem to highly immunosuppressed hosts [ 21 ].…”

Synthesis of leading chalcones with high antiparasitic, against Hymenolepis nana, and antioxidant activities

“…Intestinal parasitoses are one of the most important public health concerns, around one fifth of the world population is infected with at least one parasite (Puente et al, 2011). Hymenolepiosis by H. nana is mainly common in children, but H. diminuta infections have been also reported (Kim et al, 2014). Hymenolepiosis are usually asymptomatic, however, heavy infections with more than 2000 worms can induce a wide range of gastrointestinal symptoms, such as abdominal pain and diarrhea (Rim et al, 1978).…”