Monday, April 29, 2019

Parasite Case of the Week 542

This week's case is a lovely gif image compiled by our excellent parasitology technical specialist, Heather Arguello. The following structures were seen on a non-nutrient agar culture that had been inoculated with corneal scrapings. The plate had been overlain with Escherichia coli to provide a food source for parasites that may be present in the specimen. The central structure is ~40 micrometers in maximum dimension, while the rounded structure to the left is ~15 micrometers in diameter. Identification?

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11 comments:

  1. AnonymousApril 29, 2019 at 8:42 AM

    Acanthamoeba species. Very cool video.
    Would this be a stat report?
    BW in Vt

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  2. AnonymousApril 29, 2019 at 8:52 AM

    Ah! El patiente he usado agua sucia por lavar sus lentes de contacto. Caso típico de infección con Acanthamoeba.
    Florida Fan

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  3. Bernardino RochaApril 29, 2019 at 9:11 AM

    Agree with my predecessors. Cyst(wrinkled double wall) and trophozoite of Acanthamoeba spp.

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  4. SamApril 29, 2019 at 1:56 PM

    Acanthamoeba species

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  5. AnonymousApril 29, 2019 at 2:47 PM

    Estoy de acuerdo con mis predecesores. Buena idea la del gif animado por cierto.
    Luis

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  6. ParasiteGalApril 29, 2019 at 3:20 PM

    Thanks for the responses! Why the Spanish? I feel like I'm missing something :)

    To answer BW - yes, we consider this a critical result that gets called to the provider immediately.

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  7. AnonymousApril 29, 2019 at 5:03 PM

    Thanks for the wonderful imagery. i can now take " a microscopic view of Acathameoba" off my bucket list.

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  8. Atiya kausarApril 29, 2019 at 8:13 PM

    Nicely captured video of cyst and trophozoite of Acanthamoeba...

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  9. AnonymousApril 30, 2019 at 4:38 PM

    Very nice video of the trophozoite and cyst of Acanthamoeba. The video at times does suggest the "thorny" morphology. The shrinking away from the cell wall of the cyst is also diagnostic of the infection.
    Definitely a stat call to the physician is necessary.
    Wonder if the patient makes his own lens cleaner?
    Florida Fan

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  10. AnonymousMay 1, 2019 at 10:12 AM

    beautiful images. Acanthamoeba cyst and trophozoite

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  11. Sir GalahadMay 2, 2019 at 5:25 AM

    Cisti e Trofozoiti di Acanthamoeba...

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