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FIRST CASE OF HUMAN INFECTION BY Bertiella studeri (Blanchard, 1891) Stunkard,1940 (Cestoda; Anoplocephalidae) IN BRAZIL.

Lopes VV, dos Santos HA, Silva AV, Fontes G, Vieira GL, Ferreira AC, da Silva ES - Rev. Inst. Med. Trop. Sao Paulo (2015 Sep-Oct)

Bottom Line: Proglottids of the parasite, found in the stool sample of a two-and-a-half-year-old child, were fixed, stained and microscopically observed to evaluate its morphological characteristics.The authors concluded that the child was infected with Bertiella studeri,based on Stunkard's (1940) description of the species.This is the fifth case of human Bertiellosis described in Brazil through morphometric analysis of the parasite, the third in Minas Gerais State and the first diagnosed case of Bertiella studeri in Brazil.

View Article: PubMed Central - PubMed

Affiliation: Universidade Federal de São João del-Rei, Divinópolis, MG, Brasil, valeriana@ufsj.edu.br, gilberto.fontes@pq.cnpq.br, tutalisboa@hotmail.com, professorariltonferreira@yahoo.com.br, silvaedu@ufsj.edu.br.

ABSTRACT
Cestodes of the Bertiella genus are parasites of non-human primates found in Africa, Asia, Oceania and the Americas. Species Bertiella studeri and Bertiella mucronata could, accidentally, infect human beings. The infection occurs from ingestion of mites from the Oribatida order containing cysticercoid larvae of the parasite. The objective of this report is to register the first case of human infection by Bertiella studeri in Brazil. Proglottids of the parasite, found in the stool sample of a two-and-a-half-year-old child, were fixed, stained and microscopically observed to evaluate its morphological characteristics. Eggs obtained from the proglottids were also studied. The gravid proglottids examined matched the description of the genus Bertiella. The eggs presented a round shape, with the average diameter of 43.7 µm, clearly showing the typical pyriform apparatus of B. studeri. The authors concluded that the child was infected with Bertiella studeri,based on Stunkard's (1940) description of the species. This is the fifth case of human Bertiellosis described in Brazil through morphometric analysis of the parasite, the third in Minas Gerais State and the first diagnosed case of Bertiella studeri in Brazil.

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-Bertiella sp. eggs showing the pyriform apparatus. A) Eggs recovered from the patient's stool (200X); B) Eggs liberated from gravid proglottids (400X); C) Eggs washed with lactophenol of Amann (1000X).
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f02: -Bertiella sp. eggs showing the pyriform apparatus. A) Eggs recovered from the patient's stool (200X); B) Eggs liberated from gravid proglottids (400X); C) Eggs washed with lactophenol of Amann (1000X).

Mentions: Based on morphological features, the proglottids have been identified as Bertiella genus. Eggs observed by microscopic examination show spherical shape and an external rough membrane measuring 42 to 47.3 µm in diameter (average of 43.77 µm). The average dimension of the hexacant embryo with the pyriform apparatus was 24.5 µm and the measurement of just the hexacant embryo was 15.75 µm (Fig. 2). Based on the morphometry of the eggs and the pyriform apparatus10,15, the authors identified the species as Bertiella studeri.


FIRST CASE OF HUMAN INFECTION BY Bertiella studeri (Blanchard, 1891) Stunkard,1940 (Cestoda; Anoplocephalidae) IN BRAZIL.

Lopes VV, dos Santos HA, Silva AV, Fontes G, Vieira GL, Ferreira AC, da Silva ES - Rev. Inst. Med. Trop. Sao Paulo (2015 Sep-Oct)

-Bertiella sp. eggs showing the pyriform apparatus. A) Eggs recovered from the patient's stool (200X); B) Eggs liberated from gravid proglottids (400X); C) Eggs washed with lactophenol of Amann (1000X).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4660458&req=5

f02: -Bertiella sp. eggs showing the pyriform apparatus. A) Eggs recovered from the patient's stool (200X); B) Eggs liberated from gravid proglottids (400X); C) Eggs washed with lactophenol of Amann (1000X).
Mentions: Based on morphological features, the proglottids have been identified as Bertiella genus. Eggs observed by microscopic examination show spherical shape and an external rough membrane measuring 42 to 47.3 µm in diameter (average of 43.77 µm). The average dimension of the hexacant embryo with the pyriform apparatus was 24.5 µm and the measurement of just the hexacant embryo was 15.75 µm (Fig. 2). Based on the morphometry of the eggs and the pyriform apparatus10,15, the authors identified the species as Bertiella studeri.

Bottom Line: Proglottids of the parasite, found in the stool sample of a two-and-a-half-year-old child, were fixed, stained and microscopically observed to evaluate its morphological characteristics.The authors concluded that the child was infected with Bertiella studeri,based on Stunkard's (1940) description of the species.This is the fifth case of human Bertiellosis described in Brazil through morphometric analysis of the parasite, the third in Minas Gerais State and the first diagnosed case of Bertiella studeri in Brazil.

View Article: PubMed Central - PubMed

Affiliation: Universidade Federal de São João del-Rei, Divinópolis, MG, Brasil, valeriana@ufsj.edu.br, gilberto.fontes@pq.cnpq.br, tutalisboa@hotmail.com, professorariltonferreira@yahoo.com.br, silvaedu@ufsj.edu.br.

ABSTRACT
Cestodes of the Bertiella genus are parasites of non-human primates found in Africa, Asia, Oceania and the Americas. Species Bertiella studeri and Bertiella mucronata could, accidentally, infect human beings. The infection occurs from ingestion of mites from the Oribatida order containing cysticercoid larvae of the parasite. The objective of this report is to register the first case of human infection by Bertiella studeri in Brazil. Proglottids of the parasite, found in the stool sample of a two-and-a-half-year-old child, were fixed, stained and microscopically observed to evaluate its morphological characteristics. Eggs obtained from the proglottids were also studied. The gravid proglottids examined matched the description of the genus Bertiella. The eggs presented a round shape, with the average diameter of 43.7 µm, clearly showing the typical pyriform apparatus of B. studeri. The authors concluded that the child was infected with Bertiella studeri,based on Stunkard's (1940) description of the species. This is the fifth case of human Bertiellosis described in Brazil through morphometric analysis of the parasite, the third in Minas Gerais State and the first diagnosed case of Bertiella studeri in Brazil.

Show MeSH
Related in: MedlinePlus