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Echovirus type 7 isolated from conjunctival scrapings

K Sandelin, M Tuomioja, H Erkkilä

    Scandinavian Journal of Infectious Diseases
    |January 1, 1977
    PubMed
    Summary

    Echovirus type 7 caused an epidemic of meningoencephalitis and conjunctivitis. This study identified unique viral strains associated with eye disease, differing from standard echovirus 7.

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    Area of Science:

    • Virology
    • Ophthalmology
    • Epidemiology

    Background:

    • Echovirus type 7 is known to cause meningoencephalitis.
    • Conjunctivitis and keratoconjunctivitis are common symptoms during viral outbreaks.
    • The etiology of certain eye diseases during epidemics requires further investigation.

    Purpose of the Study:

    • To investigate the role of echovirus type 7 in an epidemic involving eye disease.
    • To characterize the isolated echovirus strains and compare them to the standard type 7.
    • To establish an etiological link between echovirus 7 and ocular manifestations.

    Main Methods:

    • Isolation of echovirus type 7 from conjunctival scrapings of patients.
    • Clinical observation of patient symptoms, including conjunctivitis, keratoconjunctivitis, gastrointestinal issues, fever, headache, and lymphadenopathy.
    • Characterization of viral isolates, including adaptation to cell cultures and hemagglutinin testing.

    Main Results:

    • Echovirus type 7 was isolated from seven conjunctival scrapings during an epidemic.
    • Patients presented with conjunctivitis/keratoconjunctivitis alongside systemic symptoms.
    • Isolated strains showed slow adaptation to cell cultures and lacked hemagglutinin for human red blood cells, differing from standard echovirus 7.

    Conclusions:

    • Echovirus type 7 is etiologically associated with the observed eye disease during the epidemic.
    • The distinct characteristics of the isolated strains warrant further study.
    • This finding highlights the potential of echoviruses to cause significant ocular pathology.

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