Bertiella studeri

{{Short description|Species of flatworm}}

{{Speciesbox

| image =

| genus = Bertiella (flatworm)

| species = studeri

| authority = (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.{{cite journal|last1=Galán-Puchades|first1=Maria Teresa|last2=Vicent Fuentes|first2=Marius|last3=Mas-Coma|first3=Santiago|title=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|journal=Folia Parasitologica|date=1 March 2000|volume=47|issue=1|pages=23–28|doi=10.14411/fp.2000.005|pmid=10833012|url=http://folia.paru.cas.cz/doi/10.14411/fp.2000.005.pdf|doi-access=free}}{{open access}} The intermediate host are oribatid mites, which ingest the eggs, and are themselves ingested by the vertebrate host. 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).{{cite book|last1=Szyfres|first1=B|last2=Acha|first2=PN|title=Zoonoses and communicable diseases common to man and animals|date=2003|publisher=Pan American Health Organization|location=Washington, D.C.|isbn=9789275119938|pages=[https://archive.org/details/zoonosescommunic0000acha/page/160 160–161]|edition=3rd|chapter=Bertielliasis|chapter-url=https://archive.org/details/zoonosescommunic0000acha/page/160}} The majority of human cases occur in individuals who have some level of contact with non-humanprimates.{{Cite web|url=https://www.cdc.gov/dpdx/bertiella/index.html|title=CDC - DPDX - Bertiella Infection|date=30 May 2019}} 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.{{cite book|editor1-last=Baker|editor1-first=D|title=Flynn's Parasites of Laboratory Animals.|date=2008|publisher=John Wiley & Sons|location=Hoboken|isbn=9780470344170|page=706|edition=2nd|chapter=Bertiella studeri}} The adult develops in the small intestine of the primate host. 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 to 1.10 cm.{{cite journal| pmc=3291388 | pmid=16634184 | doi=10.3201/eid1201.050579 | volume=12 | issue=1 | title=Bertiella studeri infection, China | year=2006 | journal=Emerg Infect Dis | pages=176–7 | last1 = Sun | first1 = X | last2 = Fang | first2 = Q | last3 = Chen | first3 = XZ | last4 = Hu | first4 = SF | last5 = Xia | first5 = H | last6 = Wang | first6 = XM}} 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.{{cite journal| pmc=4660458 | pmid=26603236 | doi=10.1590/S0036-46652015000500015 | volume=57 | issue=5 | title=FIRST CASE OF HUMAN INFECTION BY Bertiella studeri (Blanchard, 1891) Stunkard, 1940 (Cestoda; Anoplocephalidae) IN BRAZIL | year=2015 | journal=Rev Inst Med Trop Sao Paulo | pages=447–50 | last1 = Lopes | first1 = VV | last2 = dos Santos | first2 = HA | last3 = Silva | first3 = AV | last4 = Fontes | first4 = G | last5 = Vieira | first5 = GL | last6 = Ferreira | first6 = AC | last7 = da Silva | first7 = ES}}

File: Eggs_of_tapeworm_Bertiella_studeri.jpg

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References

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Category:Cestoda

Category:Parasites of primates

{{Cestoda-stub}}