Msk 15 Flashcards
This organism is facultative anaerobic or strictly anaerobic. It is filamentous, branching, and looks like slender rods. It is gram + and opportunistic. It likes to grow in the mouth. What is it?
Actinomyces sp.
This organism is a strict aerobic “rod/bacillus,” in a branched filamentous form. It has a gram + cell wall but stains poorly with gram stain. It is weakly acid-fast and aerial hyphae can be seen at high magnification.
Norcardia sp.
How do we treat norcardia infections?
TMP-SMX
This organism is a gram - strict aerobe. It is oxidase-negative and appears as a plump gram - coccobacilli. It is ubiquitous in nature and in the hospital, so it can survive on both moist and dry surfaces.
Acinetobacter sp.
Most human infections caused by A. baumannii
What distinguishes acinetobacter from pseudomonas, besides their general appearance?
Acinetobacter is oxidase -
Pseudomonas is oxidase +
What is the vector for trypanosoma cruzi?
reduviids
(Kissing bugs) - like to bite the face
How is T. cruzi transmitted?
Kissing bug bites the tissue and trypomastigote is innoculated via the kissing bug’s feces.
Trypomastigote turns into amastigote in the tissue.
What form of T. cruzi will be seen histologically in the tissues?
Amastigote
Replicating form
What form of T. cruzi will be seen in the blood?
Trypomastigote
(infective form)
Where is T. cruzi found?
Central America and South America
T. cruzi causes what disease?
American Trypanosomiasis (Chagas disease)
In Chagas disease, what is the erythematous and indurated area at the primary site called?
Chagoma
In Chagas disease, what is another name for the rash and edema around the eyes and face?
Romaña’s sign
What are the primary areas affected by Chagas disease?
Chagas
CNS
Heart
GI
Spleen
Tapeworm infection by eating undercooked, infected pork.
Taenia solium muscle infection
Cysts seen in the muscle
