Gel-eletroforese no diagnóstico da varíola

Memórias do Instituto Oswaldo Cruz, Feb 2019

The test of gel-electrophoresis applied to the pox virus group showed to be at least thirth times (30X) more sensitive than agar-gel test on the described conditions (Table I). Twelve specimens, which were positives form Smallpox in the conventional tests of egg inoculation and agar-gel difusion test, have been screened in their original dilutions frozen for more than 1 year and six of them were still detectable by gel-eletrophoresis, while by agar-gel test any of them was positive (Table II). Thirty three Smallpox isolates have been tested with material from first egg inoculation (chorioallantoic membranes) which have been stored in glycerin 50%, at - 15ºC. Fifteen of them were still positive by gel-electrophoresis and only 3 by agar-gel (Table II). The last 60 specimens received for diagnosis from Smallpox Erradication Campaign (CEV), were negatives by both tests. The gel-electrophoresis, did not show false-positives on described conditions.

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Gel-eletroforese no diagnóstico da varíola

Gel-eletroforese no diagnóstico da varíola Julio A. Mesquita1  Akira Homma Hermann G. Schatzmayr1  Conselho Nacional de Pesquisas, Brasil RESUMO O emprego de gel-eletroforese no diagnóstico da varíola, demonstrou ser ao menos trinta vezes (30X) mais sensível que o teste de agar-gel, nas condições descritas (tabela I). Doze (12) espécimes, cujos testes convencionais de inoculação em ovos embrionados e de agar-gel resultaram positivos, foram testados em suas diluições originais congeladas por mais de um ano, sendo seis deles revelados por gel-eletroforese enquanto nenhum o foi por agar-gel (tabela II). Trinta e três (33) amostras isoladas no laboratório, foram testadas com material colhido de membrana cório-alantóica da primeira inoculação para o diagnóstico, conservado em glicerina 50%, resultando 15 positivas em gel-eletroforese e apenas 3 em agar-gel (tabela II). Os últimos 60 espécimes recebidos para diagnóstico, através a Campanha de Erradicação da Varíola, também resultaram negativos em gel-eletroforese, que não mostrou falsos-positivos nas condições descritas. ABSTRACT The test of gel-electrophoresis applied to the pox virus group showed to be at least thirth times (30X) more sensitive than agar-gel test on the described conditions (Table I). Twelve specimens, which were positives form Smallpox in the conventional tests of egg inoculation and agar-gel difusion test, have been screened in their original dilutions frozen for more than 1 year and six of them were still detectable by gel-eletrophoresis, while by agar-gel test any of them was positive (Table II). Thirty three Smallpox isolates have been tested with material from first egg inoculation (chorioallantoic membranes) which have been stored in glycerin 50%, at - 15ºC. Fifteen of them were still positive by gel-electrophoresis and only 3 by agar-gel (Table II). The last 60 specimens received for diagnosis from Smallpox Erradication Campaign (CEV), were negatives by both tests. The gel-electrophoresis, did not show false-positives on described conditions. Texto completo disponível apenas em PDF. Full text available only in PDF format.


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Julio A. Mesquita, Akira Homma, Hermann G. Schatzmayr. Gel-eletroforese no diagnóstico da varíola, Memórias do Instituto Oswaldo Cruz, 109-113, DOI: 10.1590/S0074-02761972000100009