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A woman with severe retinitis


A woman with severe retinitis


حالة سريرية

الوصف الكامل Background
A 30-year-old female stored her contact lenses in tap water. She noticed deterioration of vision and visited an ophthalmologist who diagnosed her with severe retinitis. Culture of the water as well as vitreous fluid would most likely reveal:

a. Naegleria
b. Pneumocystis
c. Acanthamoeba
d. Babesia
e. Entamoeba coli

Dr. M's picture
by
السنة السادسة


صرلو زمان القمر ما بان Twisted Evil
-------------------------
بستبعد a , b , e
d ما عرفتها Rolling Eyes
بين c , d ... كنت ترجمهم

Dr.TH's picture
Dr.TH


c. Acanthamoeba

mbs2380's picture
mbs2380
بعد التخرج


عفواً ما ترجمتهون Embarrased الخيارات:
a.النغليريا
b.المتكيسة الرئوية
c.المتحولة الشوكية
d.البابسية Cool
e. المتحولة الكولونية

Dr. M's picture
Dr. M
السنة السادسة

Salam guys,
it's nice question to be on Hakeem. Thank you Moaz basha!!
well... it's a bit confusing .. using the contact lenses with distilled water and salt tablets instead of the commercially prepared Saline solutions will damage the Cornea and ends up with Keratitis or a very painful corneal ulcer especially in the immunocompromised pts.. However, the ulcer could rupture and cause endophthalmitis but not specifically retinitis.

on the other hand. I have checked Microbiology Made Ridiculously.. it says that the Acanthamoeba can cause a meningitis infection during the summer when immunocompromised pts swim in freshwater lakes and un-chloride swimming pools.
it goes in through the nasal mucosa, through the cribriform plate into the brain and SCF.

I have checked the Kaniski Ophthalmology Text Book as well, haven't found that the acanthamoeba could cause retinitis.

I am working on it to find it thou. But I am having a doubt that there might be a translation error in the question somehow...!!

Thanks again guys..

Best wishes.

bigmind's picture
bigmind
طالب دراسات عليا

Quote:
Acanthamoeba can cause a meningitis infection during the summer when immunocompromised pts swim in freshwater lakes and un-chloride swimming pools.
it goes in through the nasal mucosa, through the cribriform plate into the brain and SCF

and so does the naegleria

mbs2380's picture
mbs2380
بعد التخرج

The answer is: c. Acanthamoeba
explanation:
Acanthamoeba is a free-living ameba as is Naegleria. Naegleria usually causes severe, often fatal, meningoencephalitis, while Acanthamoeba is uncommonly isolated from contact lens fluid and patients with retinitis who do not store their lenses under sterile conditions. Acanthamoeba can be grown on nonnutrient agar plates using Escherichia coli as a food source. They are identified microscopically with use of a nonspecific fluorescent stain.
-I got this question and the explanation from Microbiology pre-test 10th edition-
Quote:
As far as I know acanthamoeba can cause keratitis ...
I don't know if keratitis can lead or progress to retinitis?!
Quote:
haven't found that the acanthamoeba could cause retinitis

so It might be a mistake in the questionRolling Eyes
they had to say keratitis instead of retinitis Cool
in Ridiculously made simple, Medical microiology and even our lovely book in the collage; all of them said that Acanthamoeba cause keratitis ...
but they didn't say any thing about retinitis

شكراً عالمشاركة جميعاً Eye-wink

Dr. M's picture
Dr. M
السنة السادسة

Quote:
Naegleria usually causes severe, often fatal, meningoencephalitis

by the way any body watched Dr.House Cool (I think the second season)
when Dr. Fowrman got sick and he was almost died
he was infected with Naegleria ... Cool Cool Cool
so I will never forget this ameba or It's symptoms
sallam Eye-wink

Dr. M's picture
Dr. M
السنة السادسة
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