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15 Cards in this Set
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- Back
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Complications of this form of malaria include pulmonary edema, renal failure w/or without hemoglobinuria, shock, hypoglycemia and cerebral malaria, with a 48hr fever spike cycle
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Plasmodium falciparum
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intraerythrocytic parasite that causes relatively mild, self limited disease called babesiosis.
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Babesia microti
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fever spikes every 72hrs, with mild sxs.
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Plasmodium malariae
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48 hour fever spike with spleen rupture
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Plasmodium ovale
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patient with renal failure. presents with flu like sxs, nausea, vomiting and a rash that starts at ankles and moves centrally? what is it and how do you treat it?
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Rocky mountain spotted fever (Rickettsia obligate intracellular anaerobe). Treat with doxycycline because any other tetracyclin will accumulate in patient with renal failure. Doxycyline is concentrated in bile and excreted in urine and feces in active form.
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An HIV patient in hospital has histoplasmosis disseminated infection. Is the disease communicable to other patients?
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No, histoplasmosis is inhailed via soil or dust that contains the organism, once in the body it is intracellular in a yeast form, so not communicable.
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which viruses cannot replicate in a host cell without their own polymerases?
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Negative sense ssRNA viruses, reovirus (dsRNA virus), pox virus which replicates in the cytoplasm and all retroviruses.
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what species of bacteria are able to undergo natural transformation.
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Strep pneumo, Hib, Neisseria. Ex: outbreak of strep pneumo in hospital, initally responds to penicillin then one month later same isolates show resistance to penicillin.
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explain the mechanism of specialized transduction?
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involves an accident in the lifecycle of a temperate lysogenic phage where there is an excision of the phages DNA when its cut out of the bacterials DNA cutting outside the Insertion sequence. so if there is a chance for a drug resistance to be excised on accident with the phages DNA it will be whatever drug resistant gene is closest to the insertion sequence.
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a patient that had a heart transplant 1 year ago presents with ring enhancing lesions on MRI. what's the Dx and what happened?
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The patient most likely had a toxoplama gondii infection which is suppressed normally by non-immunocompramised patients. Remember post transplant pt's are put on immunosuppressants which can cause a re-occurance of the existing infection
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muscle soreness, headache, malaise, nausea, vomiting, fever looks like what two infections? What vector to they share? Add a absolute leukopenia thrombocytopenia and granulocytes that contain berry like clusters of intracellular organisms its now which of the two?
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Rocky mountain spotted fever or ehrlichiosis. Ixodes tick. Granulocytic Ehrlichiosis
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what causes devestating neonatal encephalitis presenting with erythema and vesicular skin lesions after birth then progresses to neurological issues then dies?
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Herpes simplex 2 (TORCH infections normally don't cause encephalitis)
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How does a cross infected adult with erythema infectiosum (B-19, fifths) disease present?
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bilateral arthralgia and arthritis. No slapped cheeks
Parvovirus is naked ssDNA icosahedral |
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Child with extremely high fever, then it breaks and child breaks out with lacy body rash?
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HHV6 causative agent of roseola infantum
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whats the causative organism of measles:
- koplic spots - 3c's - photophobia - maculopapular rash starting at ears and spreading to cover face |
Rubeola
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