Bertiella studeri

Bertiella studeri
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Cestoda
Order:	Cyclophyllidea
Family:	Anoplocephalidae
Genus:	Bertiella
Species:	B. studeri
Binomial name
	Bertiella studeri; (Blanchard, 1891)

Bertiella studeri is a species of Bertiellia, a type of cestodes (tapeworms). It is a parasite of primates which was first described in the rhesus macaque (Macaca mulatta) in 1940.[1] The intermediate host are oribatid mites,[1] which ingest the eggs, and are themselves ingested by the vertebrate host.[2] Oribatid mites infected with Bertiella transfer the developmental cysticercoid stage to a human host through tissue feeding.

This is one of two species of Bertiella that cause Bertielliasis in humans (the other being Bertiella mucronata).[3] The majority of human cases occur in individuals who have some level of contact with non-humanprimates.[4] Geographic distribution of cases demonstrate Bertiellia infection within countries from Asia, Africa, and the Americas.

Morphology

An adult B. studeri tapeworm measures 10–30 cm long, and is 1 cm wide.[2] The adult develops in the small intestine of the primate host.[2] Once the adult develops in the small intestine, section of proglottid are expelled through the anus every 2 to 3 days. The average length of a B. Studeri proglottid segment is 0.1 cm with an average width ranging from 0.68-1.10 cm.[5] B. Studeri infection in humans is usually asymptomatic. Although, infection can also lead to gastrointestinal irritation, diarrhea, abdominal pain, anorexia, weight loss, vomit and/or constipation.[6]

Eggs from proglottids of Bertiella studeri, seen under the microscope (scale bar = 10 μm)

References

Galán-Puchades, Maria Teresa; Vicent Fuentes, Marius; Mas-Coma, Santiago (1 March 2000). "Morphology of Bertiella studeri (Blanchard, 1891) sensu Stunkard (1940) (Cestoda: Anoplocephalidae) of human origin and a proposal of criteria for the specific diagnosis of bertiellosis" (PDF). Folia Parasitologica. 47 (1): 23–28. doi:10.14411/fp.2000.005. PMID 10833012.
Baker, D, ed. (2008). "Bertiella studeri". Flynn's Parasites of Laboratory Animals (2nd ed.). Hoboken: John Wiley & Sons. p. 706. ISBN 9780470344170.
Szyfres, B; Acha, PN (2003). "Bertielliasis". Zoonoses and communicable diseases common to man and animals (3rd ed.). Washington, D.C.: Pan American Health Organization. pp. 160–161. ISBN 9789275119938.
https://www.cdc.gov/dpdx/bertiella/index.html
Sun, X; Fang, Q; Chen, XZ; Hu, SF; Xia, H; Wang, XM (2006). "Bertiella studeri infection, China". Emerg Infect Dis. 12 (1): 176–7. doi:10.3201/eid1201.050579. PMC 3291388. PMID 16634184.
Lopes, VV; dos Santos, HA; Silva, AV; Fontes, G; Vieira, GL; Ferreira, AC; da Silva, ES (2015). "FIRST CASE OF HUMAN INFECTION BY Bertiella studeri (Blanchard, 1891) Stunkard,1940 (Cestoda; Anoplocephalidae) IN BRAZIL". Rev Inst Med Trop Sao Paulo. 57 (5): 447–50. doi:10.1590/S0036-46652015000500015. PMC 4660458. PMID 26603236.

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[Galán-Puchades_2000-1] Galán-Puchades, Maria Teresa; Vicent Fuentes, Marius; Mas-Coma, Santiago (1 March 2000). "Morphology of Bertiella studeri (Blanchard, 1891) sensu Stunkard (1940) (Cestoda: Anoplocephalidae) of human origin and a proposal of criteria for the specific diagnosis of bertiellosis" (PDF). Folia Parasitologica. 47 (1): 23–28. doi:10.14411/fp.2000.005. PMID 10833012.

[Baker_2008-2] Baker, D, ed. (2008). "Bertiella studeri". Flynn's Parasites of Laboratory Animals (2nd ed.). Hoboken: John Wiley & Sons. p. 706. ISBN 9780470344170.

[3] Szyfres, B; Acha, PN (2003). "Bertielliasis". Zoonoses and communicable diseases common to man and animals (3rd ed.). Washington, D.C.: Pan American Health Organization. pp. 160–161. ISBN 9789275119938.

[4] ttps://www.cdc.gov/dpdx/bertiella/index.html

[5] Sun, X; Fang, Q; Chen, XZ; Hu, SF; Xia, H; Wang, XM (2006). "Bertiella studeri infection, China". Emerg Infect Dis. 12 (1): 176–7. doi:10.3201/eid1201.050579. PMC 3291388. PMID 16634184.

[6] Lopes, VV; dos Santos, HA; Silva, AV; Fontes, G; Vieira, GL; Ferreira, AC; da Silva, ES (2015). "FIRST CASE OF HUMAN INFECTION BY Bertiella studeri (Blanchard, 1891) Stunkard,1940 (Cestoda; Anoplocephalidae) IN BRAZIL". Rev Inst Med Trop Sao Paulo. 57 (5): 447–50. doi:10.1590/S0036-46652015000500015. PMC 4660458. PMID 26603236.