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Artigo<br />

Diagnóstico Coproparasitológico: Comparação dos Métodos <strong>de</strong><br />

Faust et al., Lutz e Ritchie Modificado por Young<br />

Maíra Cavalcanti <strong>de</strong> Albuquerque 1 , Flavia Mattos <strong>de</strong> Carvalho 2 , Pedri<strong>na</strong> <strong>da</strong> Silva 3 , Otílio Machado Pereira Bastos 4 , Claudia Maria Antunes Uchôa 4<br />

1 – Discente <strong>de</strong> graduação do Curso <strong>de</strong> Ciências Biológicas. Universi<strong>da</strong><strong>de</strong> Fe<strong>de</strong>ral Fluminense<br />

2 – Discente <strong>de</strong> graduação do Curso <strong>de</strong> Enfermagem. Universi<strong>da</strong><strong>de</strong> Fe<strong>de</strong>ral Fluminense<br />

3 – Auxiliar técnico. Discipli<strong>na</strong> <strong>de</strong> Parasitologia. Departamento <strong>de</strong> Microbiologia e Parasitologia. Instituto Biomédico -<br />

Centro <strong>de</strong> Ciências Médicas, UFF<br />

4 – Docente <strong>da</strong> Discipli<strong>na</strong> <strong>de</strong> Parasitologia. Departamento <strong>de</strong> Microbiologia e Parasitologia.<br />

Instituto Biomédico - Centro <strong>de</strong> Ciências Médicas, UFF<br />

Resumo<br />

Summary<br />

Diagnóstico Coproparasitológico: Comparação dos Métodos<br />

<strong>de</strong> Faust et al., Lutz e Ritchie Modificado por Young<br />

As enteroparasitoses representam um problema <strong>de</strong> Saú<strong>de</strong> Pública,<br />

principalmente em crianças, po<strong>de</strong>ndo <strong>de</strong>termi<strong>na</strong>r alterações orgânicas<br />

significativas. O diagnóstico específico <strong>de</strong>ssas parasitoses<br />

baseia-se <strong>na</strong> i<strong>de</strong>ntificação <strong>de</strong> estruturas parasitárias presentes em<br />

fezes dos indivíduos infectados, sendo que a utilização <strong>de</strong> técnicas<br />

com diferentes fun<strong>da</strong>mentos aumenta a eficiência diagnóstica,<br />

reduzindo, significativamente, os resultados falsos-negativos. Este<br />

estudo teve como objetivo avaliar a eficiência do método <strong>de</strong> Ritchie<br />

modificado por Young, comparando seus resultados aos obtidos<br />

pelos métodos <strong>de</strong> Faust e cols. e Lutz. Estu<strong>da</strong>ram-se amostras <strong>de</strong> 72<br />

indivíduos <strong>da</strong> ci<strong>da</strong><strong>de</strong> <strong>de</strong> Niterói, RJ. Desses, 32 (44,4%) apresentaram<br />

positivi<strong>da</strong><strong>de</strong> por pelo menos uma <strong>da</strong>s técnicas e 40 (55,5%)<br />

foram negativas pelas três metodologias. A técnica <strong>de</strong> Faust e cols.<br />

<strong>de</strong>terminou positivi<strong>da</strong><strong>de</strong> em 25/72 (34,7%) indivíduos, a <strong>de</strong> Lutz<br />

em 24/72 (33,3%) e a <strong>de</strong> Ritchie modificado por Young em 30/72<br />

(41,6%). A técnica <strong>de</strong> Ritchie modifica<strong>da</strong> por Young obteve uma<br />

maior sensibili<strong>da</strong><strong>de</strong> <strong>na</strong> <strong>de</strong>tecção <strong>de</strong> Giardia lamblia, Entamoeba<br />

histolytica e Blastocystis hominis, evi<strong>de</strong>nciando também ovos <strong>de</strong><br />

Ascaris lumbricoi<strong>de</strong>s e Trichuris trichiura. Desta forma, po<strong>de</strong>-se<br />

concluir que a técnica <strong>de</strong> Ritchie modifica<strong>da</strong> por Young apresentou<br />

maior eficiência no diagnóstico coproparasitológico, tanto<br />

<strong>na</strong> <strong>de</strong>tecção <strong>de</strong> helmintos como <strong>de</strong> protozoários, principalmente<br />

quando utiliza<strong>da</strong> isola<strong>da</strong>mente.<br />

Palavras-chave: Diagnóstico, parasita intesti<strong>na</strong>l, técnica <strong>de</strong><br />

Ritchie modificaa por Young<br />

Coproparasitological diagnosis: methods comparation<br />

between Faust et al., Lutz and Ritchie modified<br />

by Young<br />

Enteroparasites represent a problem of public health, mainly in<br />

children, which can <strong>de</strong>termi<strong>na</strong>te significant organic alterations. The<br />

specific diagnosis of these parasites is based on the i<strong>de</strong>ntification of<br />

parasitic structures in feces of parasited persons. The use of techniques<br />

with different basis increases the efficiency of diagnosis and<br />

reduces, significantly, false-negative results. The aim of this study was<br />

to evaluate the efficiency of the method of Ritchie modified by Young<br />

comparing its results with gotten by the methods of Faust et al and<br />

Lutz. We studied samples of 72 individuals from Niterói, RJ. Among<br />

these, 32 (44.4%) were positive for at least one of the techniques<br />

and 40 (55.5%) were negative for all three methods. Faust et al.<br />

method presented positivity in 25/72 (34.7%) individuals, Lutz in<br />

24/72 (33.3%) and Ritchie modified by Young in 30/72 (41.6%).<br />

The method of Ritchie modified by Young had more sensitivity in the<br />

<strong>de</strong>tection of Giardia lamblia, Entamoeba histolytica and Blastocystis<br />

hominis, being also capable to evi<strong>de</strong>nce Ascaris lumbricoi<strong>de</strong>s and<br />

Trichuris trichiura eggs. Based on these results, we conclu<strong>de</strong>d that<br />

the technique of Ritchie modified by Young presented efficiency<br />

in the coproparasitological diagnosis as much in the <strong>de</strong>tection of<br />

helminths as protozoan.<br />

Keywords: Diagnosis, intesti<strong>na</strong>l parasites, Ritchie technique<br />

modified by Young<br />

132<br />

<strong>NewsLab</strong> - edição 91 - 2008

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