random micro Flashcards
how does baccilis anthacis infect and spread?
contracted with exposure to infected animals
vegitative growth at site of inoculation produces black eschar, then spreads through lymphatics to blood
what is a potential dangerous complication of corynebaterium diphtheriae?
myocarditis (with pharyngitis)
what is a major cause of rhinitis in immunocompromised patients, especially HIV + ?
CMV
pt with a burn is found to have infection that cultures oxidase-positive rods that don’t ferment lactose. What is most likely agent?
pseudomonas
treat with 4th generation cephalosporin (e.g. cefepime) or ceftazidime (3rd generation, but NOT with ceftriaxone!)
pt has 3 days discomfort and swelling in the right axilla with a single enlarged tender axillary lymph node and low grade fever. superficial skin lesions are seen on the right arm. The organism responsible for causing the lymphadenopathy is also associated with what condition?
bacillary angiomatosis
bartonella henselae - cat scratch disease
primary innoculation evolves from vesicular to erythamtous to appular followed by development of tender regional lymphadenopathy (often involving a single node) Axillary lymphadenopathy is most common. associated with low grade fever and usually self limiting
bacillary angiomatosis is more common in immunocompromised - it presents with big red-purple papular skin lesions (can be fatal if untreated).
chronic infection of what is a risk factor for bladdar cancer?
shistosomia haematobium
presents acutely as swimmers itch (due to organism penetrating the skin) or as Katayama fever (fever, uticaria, angioedema, eosinophilia)
can lead to hematuria and fibrosis of the bladder
what is the cause of malignant otitis externa in individuals using contaminated swimming pools or hot tubs?
pseudomonas
what does the rash look like from rocky mounted spotted fever?
papular or petechial rash that begins on the ankles and writs and spreads to the trunk, palms and soles (ends up looking like chicken pox)
