Micro p.142-146 Flashcards
Ixodes ticks live on which animals?
deer and mice
which bacterial infection is frequently mistaken for Kaposi sarcoma?
bacillary angiomatosis by Bartonella spp
Other infection that Bartonella spp cause?
Cat scratch disease
Relapsing fever is caused by?
Borrelia recurrentis, (recurrent due to variable surface
antigens)
Unpasteurized dairy can be the source of what bacterial infection?
Brucellosis/undulant fever
Which bug can cause bloody diarrhea that is transmitted from puppies, livestock (fecal-oral, ingestion of
undercooked meat)?
Campylobacter
Which bug may cause bloody Diarrhea, vomiting,
fever, abdominal cramps by eating poultry?
Salmonella
The spores of this bug can be inhaled as aerosols from cattle/sheep amniotic fluid:
Coxiella burnetii
Leptospirosis can be transmitted thru what?
animal urine
Pasteurella multocida can cause what 2 pathologies?
Cellulitis, osteomyelitis
Amine whiff test is used to dx which bac infection?
Gardnerella vaginalis
Tx for Gardnerella vaginalis?
metronidazole or clindamycin
T or F? Gardnerella vaginalis is not associated with sexual activity, and is not sexually transmitted.
F, Gardnerella vaginalis is associated with sexual activity but is not an STD!
Tx for all Rickettsial diseases?
Doxycycline
Which bac infection causes rash that typically starts at wrists and ankles and then spreads to trunk, palms, and soles?
Rocky Mountain spotted fever by Rickettsia rickettsii
Which Rickettsia causes an epidemic of human body louse?
R. prowazekii.
which bug has a morulae in cytoplasm of monocyte? (berry-like inclusions)
Ehrlichiosis
Which bug has granulocytes with morulae in cytoplasm?
Anaplasmosis
Whats the most common cause of culture ⊝ endocarditis?
Coxiella burnetii
T or F? Elementary body replicates in cell by fission; while Reticulate bodies are Enfectious and enters cell via
endocytosis.
F. Its vice versa
Why are β-lactam antibiotics less effective with Chlamydia infections?
The chlamydial cell wall lacks classic
peptidoglycan (due to reduced muramic acid),
What stain is used to dx Chlamydia?
Giemsa or fluorescent antibody–stained smear
Name 4 paths of Chlamydia trachomatis:
reactive arthritis (Reiter syndrome)
follicular conjunctivitis
non-gonococcal urethritis
PID
Which Chlamydial trachomatis serotypes cause chronic infection, blindness due to follicular conjunctivitis in Africa?
Types A, B, and C
What is Lymphogranuloma venereum and what causes it?
small, painless ulcers on genitals–> swollen, painful inguinal lymph nodes that ulcerate (buboes). Caused by Chlamydia trachomatis Types L1, L2, and L3
Bug that causes nonproductive cough, patchy or diffuse interstitial infiltrate), X-ray looks worse than patient?
Mycoplasma pneumoniae
Which bug cold agglutinates or lyse RBCs and is grown on Eaton agar?
Mycoplasma pneumoniae
Tx for local mycosis infection
fluconazole or itraconazole for local infection
Tx for systemic mycosis infection?
amphotericin B
Systemic mycoses can mimic what other granulomatous infection?
TB
Name the budding yeast in Latin America which is much larger than RBC?
Paracoccidio
Name the fungus that causes inflammatory lung disease
and can forms granulomatous nodules.
Blastomycosis
Which states are Blastomycosis found?
States east of Mississippi River and Central
America.
How does Blastomycosis reproduce and whats their size compared to RBC?
Broad-base budding, same size as RBC
Fungus that can cause erythema nodosum, arthralgias, pneumonia and meningitis?
Coccidioides
2 Fungi that can disseminates to skin and bone?
Blastomyces, Coccidioides
Order the size of the following fungi compared to RBC: Histoplasma Blastomycosis Coccidiomycosis Paracoccidioidomycosis
Histoplasma > RBC
Paracoccidioidomycosis»_space; RBC
Coccidioidomycosis is found where in United States, and how does it transmit?
in Southwestern, California
after earthquakes spores in dust thrown into air are inhaled –> spherules in lung
Which fungal infection is seen in Mississippi and Ohio River valleys?
Histoplasmosis
Histoplasmosis is found where in the cell?
inside macrophage
Bird or bat droppings might contain what fungus?
Histoplasmosis
Name the branching septate hyphae visible on KOH preparation with blue fungal stain?
Tinea
dermatophytes
Which Tinea occurs on head, scalp and is associated with lymphadenopathy, alopecia, scaling?
Tinea capitis
Which Tina is characterized by erythematous scaling rings (“ringworm”) and central clearing that can be acquired from contact with an infected cat or dog?
Tinea corporis
Which Tinea occurs in inguinal area and often does not show the central clearing seen in tinea corporis?
Tinea cruris
Which type of Tinea pedis is the MC type?
Interdigital
which Tinea causes Onychomycosis on nails?
Tinea unguium
Name the yeast-like fungus that degradates lipids producing acids which damage melanocytes and cause
hypopigmented and/or pink patches?
Malassezia spp (Tinea versicolor)
In which season do Malassezia infections commonly occur? How do they appearance on microscopy?
in summer (hot, humid weather). looks like “Spaghetti and meatballs” under microscope.
Tx for Tinea versicolor?
topical and/or oral antifungal medications, selenium sulfide.
