Infectious/Fungal Flashcards
What is the rate of movement of the larva migrans in strongyloides (larva currens?)
5-10cm/h
Madura foot (Actinomycetoma) with grain color: white
Nocardia
Riettsialpox: bacteria and vector
R. akari & vector: mouse mite (Liponyssodies sanguineus)
Treatment for Rhinoscleroma
Cipro
Tick vector for Boutonneuse fever
Rhipicephalus sanguineus
Treatment for African sleeping sickness
Suramin Or Pentamidine
Lymphogranuloma venereum is caused by which bacteria
Chlamydia trachomatis
Vector of Epidemic Typhus
Body louse (Pediculosis humanus var. corporis)
Fever, arthritis, ulceration of the site of the bite, associated with rash, acral distribution
Ratbite/Haverhill fever (streptobacillus moniliformis)
Glossina spp.
Tsetse fly - vector in sleeping sickness (African trypanosomiasis)
What do you add to amphotericin B to help treat crypto?
Flucytosine
Describe the three leprosy reaction states and what you treat each with
Type 1 - reversal reaction (upgrading downgrading) - Steroids Type 2- E. Nodosum leprosum -Thalidomide Type 3 - Lucio reaction - vasculitis - Steroids
how many weeks after primary stage of syphilis does secondary stage happen?
9 weeks
Verruga paruana
The chronic stage of Oroya fever
First stage -indurated chancre, resolves, fevers, anular erythematous patches, posterior cervical lymphadenopathy, then second stage of daytime somnolence
Sleeping sickness (African Trypanosomiasis)
White islands in a sea of red
Dengue fever
Another name for Frambesia
Yaws
What does the hobo spider look like?
Herringbone striped pattern on the abdomen
Patient with TB gets a deep nodule over the cervical lymph node
Scrofuloderma (seen in a sensitized host with low immunity) *route is contiguous spread from underlying lymphadenitis
Most common organism causing Majocchis granuloma
T. Rubrum
what stage syphilis is the maculopapular rash?
second
What do you treat a Type II leprosy reaction state with?
Thalidomide
Bacteria causing Oroya fever
Bartonella bacilliformis
Gram stain “school of fish”
Haemophilus ducreyi (Chancroid)
Treatment for Tinea Capitis
Griseofulvin 25mg
What causes MRSA to be resistant?
(PBP2a) Altered penicillin binding protein. Resulting from the mecA gene
R. akari
Rickettsialpox
Which deep fungal infection resembles molluscum in an HIV patient?
Coccidiomycosis
Name the four conditions associated with Bartonella infection
1.Ororya fever (fever, hemolytic anemia) 2. Cat scratch disease (lymphadenitis after cat scratch) 3. Bacillary Angiomatosis (lots of PGs, in HIV pts) 4. Trench fever (relapsing fever, sore shins, back pain, transient rash)
inflammatory skin plaque in the urinary tract which turns into a weeping or polypoid mass
Malakoplakia
Vector for Bacillary angiomatosis
lice, ticks, fleas
Undulant fever
Brucellosis
Fever, HA, myalgias, rash that spreads from hands and feet onto the body
RMSF
Name the pneumonic for fluorescent ectothrix
Cats (M. Canus) And (M. Audouninii) Dogs (M. Distortum) Fight (M. Ferrugineum) & Growl (M. Gypsum) Sometimes (T. Schoenleinii)
Which organism causes Favus?
T. Schoenleinii
Hebra nose
Rhinoscleroma
One to few erythematous papules at inoculation site which disappears, then new smaller lesions spread symmetrically over the body, finally can get gum at a, keratoderma, midfacial distruction
Yaws
Treatment for Lobomycosis
Surgical excision (antifungals are ineffective)
Winter bottoms sign associated with what tropical disease?
African sleeping sickness(African trypanosomiasis) caused by the tstste fly glossina spp
On what part of the hand do you usually find erosio interdigitalis blastomycosis?
Fingers - 3rd webspace Toes - 4th webspace
Acrodermatitis chronic atrophic and
Loss of subcutaneous fat w/thin atrophic skin associated with Lyme disease
What three diseases does the Ixodes Scapularis tick cause?
Lyme disease Babesiosis Erlichiosis (human granulocytic)
Name some infections (besides syphilis) that you use penicillin to treat with?
Haverhill fever/Rat bite fever Leptospirosis
Treatment for Haverhill/rat bite fever
Penicillin
A gardener gets a subcutaneous nodule, which ulcerates and then begins spreading up his leg. What is this? What does it look like on path? What is the treatment?
Lymphocutaneous Sporotrichosis Sporothirx asteroid body (yeast cell with surrounding eosinophilic fringe Treat with SSKI (supersaturated potassium iodide) *side note: the treatment for non lymphocutaneous sporotrichosis is just itraconazole
formal name of the BROWN DOG TICK
Rhipicephalus sanguineus
Tick causing Lyme disease in the wester US
Ixodes pacificus
stage of syphilis: mucous patches
second
What route is military tuberculosis spread?
Hematogenous
What wavelength does ectothrix fungi flouresce at?
365nm (365nm - earth, on a mercury (mercury) lamp made of nickel chromium oxide (planets) filter
What bacteria causes Rhinoscleroma
Klebsiella Pneumonia
Tender nodule on guy who cleans out fish tanks
Mycobacterium marinum
stage of syphilus: condyloma lata
second
What organism causes black Piedra?
Piedraia hortae
Name the findings of the second stage of syphilus
Maculopapular rash Condyloma lata Lues maligna alopecia mucous patches
You can get Parinaud-oculoglandular syndrome from what three conditions?
Sarcoidosis Tularemia Cat Scratch Disease (bartonella)
Non-venereal treponemal infection with white vitiligo-like lesions on the face, hands, wrists
Pinta (carate) caused by treponema carateum
Most common cause of tinea capitis
T. Tonsurans
A child comes home from school after being treated for a lice breakout in his school and he has a seizure. What was the drug he was most likely treated with?
Lindane
Thrombiculid
Chiggar mite which is a vector for Scrub Typhus
Bacteria causing Trench fever
Bartonella quintana
What two conditions do you treat with Streptomycin?
Tularemia and the Plague
Tiny blue-red papules which become crusted, seen mainly in infants or immunosuppressed patients, associated with TB
Military tuberculosis
Treatment for meningococcemia
High dose IV PCN or third gen cephalosporin
Bartonella infection associated with fever in Peru
Oroya fever
Treatment for Rat-bite/Haverhill fever
Streptomycin
Soft ticks - ornithodoros are the vector for what disease?
Tick-born relapsing fever
What is OVERALL (serologic, treponemal, nontreponemal, path stains ect) most sensitive and specific test to detect PRIMARY syphilis?
Darkfield microscropy *treponemal tests (FTA-ABS and MHA-TP) are the most sensitive and specific SEROLOGIC tests And the *nontreponemal tests (VDRL AND RPR) are the serologic tests used to track progress of treatment
Trichphytan concentricum causes:
Tinea Imbricata
What kind of virus is HCV, and what other diseases are caused by it?
Flavivirus -also causes Dengue fever and Yellow fever (RNA virus)
Which stain stains dematiaceous (pigment producing) fungi? Like Tinea Nigra
Fontana-Masson
What do you treat a Type I leprosy reaction state with?
Steroid (treat type II with Thalidomide)
What stain identifies spirochetes of syphilis?
Warthin Starry stain
R. Tsutsugamushi
Scrub Typhus
treatment for leishmaniasis
pentavalent antimonial (sodium stibogluconate)
Which syphilis tests become nonreactive over time, and especially after treatment?
The non-treponemal test (RPR, VDRL)
C. Tenuis VS C. Minutissimum - which one causes erythrasma and which one causes trichomycosis axillaris?
C. Minutissimum causes erythrasma C. Tenuis causes trichomycosis axillaris
How often does the head louse: Feed? Lay eggs?
Feeds every 4-6 hours Lays eggs every 5-10 days
What three antibodies become positive after infection with Group A Strep?
Antistreptolysin O (ASO), anti-hyaluronidase, anti-DNAse B
what stage of syphilis is the chancre?
primary stage
Organism causing Pinta (carate)
Treponema carateum
fistulous tract in the groin plus von hansemann cells and michaelis-gutmann bodies
Malakoplakia
Mikulicz cell, Russel bodies
Rhinoscleroma
Influenza is caused by what kind of virus?
Orthomyxovirus (RNA)
Name the two types of treponemal tests for syphilis
FTA-ABS MHA-TP *RPR and VDRL are NONtreponemal serologic tests
stage of syphilis: cardiovascular
tertiary
Michaelis-Guptmann bodies (von-Hansemann cells)
Malakoplakia
Dengue fever is caused by what kind of virus?
Flavivirus (RNA)
What two bacteria is the body louse (Pediculus humanus) a vector for?
Bartonella quintana (Trench fever) & Rickettsiae prowazekii (Endemic Typhus)
Treatment for general and non-general treponematoses
Benzathine PCN
R. Typhi
Endemic Typhus
Treatment for Malakoplakia
Cipro and surgical removal
Name two examples of gram positive rods
Corynebacteria and Anthrax
Measles and mumps are what kind of virus?
Paramyxovirus
What do you treat erysipelas with?
Penicillin
first, a fever and a hemolytic anemia then, erythematous papules and nodules which resol\ve spontaneously
Oroya fever
A person being treated for lepromatous leprosy has a severe reaction during treatment and develops vasculitis (E nodosum leprosum). What to treat with?
Thalidomide
Solitary red purple nodule on the finger or multiple cherry red nodules at site of inoculation -working with cows and baby calves
Milkers nodule - Parapox
What two conditions does t. Mentag cause
Bullous tinea and white superficial spreading onychomycosis
What nerve is commonly affected in early disseminated Lyme disease
Facial nerve
Painless subcutaneous papule which ulcerates with painful, beefy, red granulation tissue
Granuloma inguinale
Rabies caused by which kind of virus
Rhabdovirus
Organism causing endemic syphilis (Bejel disease)
Treponema pallidum (endemicum subtype)
Potential side effect of Pyrethrin lice treatment?
Allergy in person who is allergic to ragweed or cysanthemum (bc pryrethrin is made from crysanathemum)
Vector for cat scratch disease?
cat flea (Ctenocephalides felis)
Treatment for onchocerciasis
Ivermectin or DEC (which causes the Mazzoti reaction)
Another name for Guinea worm disease
Dracunculiasis
culture medium used to diagnose leishmaniasis
Novy-McNeal-Nicolle
What other condition do coccidomycosis lesions in an HIV patient resemble?
Molluscum
What is scytalidium dimidatium and what do you treat it with?
The black nail! A dematiaceous (pigmented) fungus, treat with itraconazole
Finding in Lyme disease: loss of subcutaneous fate with thin atrophic skin
Acrodermatitis chronic atrophicans
What pigment producing chemical in psuedomonas produces the brown black pigment in pseudomonas?
Pyomelanin
Treatment for blastomycosis and also paracoccidio (South American blastomycosis)
Oral antifungal like itraconazole/ketoconazole
Subcutaneous inflammatory nodule with ulceration on posterior calves
Erythema induratum (Bazin)
Most common type of white superficial spreading onychomycosis
T. Mentag. (But in HIV patients, T rubrum is the most common for white superficial spreading)
Ulcerated nodule at inoculated site with regional lymphadenopathy, plus little nodules along the lymph nodes -nasal septal perforation
Glanders (*and those little buds along side the lypmh nodes are called farcy buds)
Name the live attenuated viruses
Influenza nasal spray Measles Mumps Rubella BCG Yellow fever Polio oral Typhoid oral
People with HLA-DQ1 are more likely to form which type of leprosy?
Lepromatous (TH2 response)
What does the Warthin Starry stain detecT?
Syphilis spirochetes
Which antifungal can cause drug induced LE?
Terbinafine and Griseofulvin
R. Prowazekii
Epidemic Typhus (Louse born)
Streptobacillus moniliformis
Rat-Bite fever
What do you treat Oroya fever with?
Chloramphenicol
What does R. conorri cause?
Mediterranean spotted fever (Boutonneuse fever)
Name two diseases that the body louse (Pediculus humanus) is a vector for:
Trench fever & Endemic typhus
What is a favorable sign in pulmonary coccidiomycosis?
Erythema nodosum
stage of syphilis: neurosyphilus
tertiary
Chlamydia trachomatis
Lymphogranuloma venereum
Mexican who is harvesting chicle gum in the forest gets a ulceration on his ear.
Chiclets ulcer - caused by new world Leichmaniasis
The plaque is transmitted by what animal
flea bites
What type of virus is Orf caused by?
Parapox
What bacteria causes syphilis?
Treponema pallidum
Flea borne Typhus
Endemic Typhus
Recurrent meningitis patients may have a defect in what cellular pathway component
C5-9
Treatment for the plague
Streptomycin
Tick borne relapsing fever caused by what vector
Soft ticks - ornithodoros
A patient has sore shins, relapsing fever, back pain, transient rash
Trench fever
What is the most common gram negative infection that we deal with in dermatology in the US?
Pseudomonas
Which atypical mycobacterium are photochromagens? (Pigmentation on exposure to light)
M. Kansasii M. Mariunum M. Simiae *monkey swim in kansas in the summer
Treatment for Chagas’ disease
Nitrofurtimox/benznidazole
Treatment for vibrio
Doxycycline
Vector for Endemic Typhus
Rat flea (Xenopsylla Cheops) * Everything is bigger EN teXas)
PPD positive how many days after exposure?
2-10 weeks
Burkholderia mallei
Glanders
Difference between Ecthyma and Ecthyma Gangrenosum
Ecthyma is a strep infection - treat with dicloxacillin Ecthyma gangrenosum is a pseudomonal infection - treat with IV amminoglycoside
Malta fever
Brucellosis
Name the three photochromagen atypical mycobacteria
M. Kansasii M. Marinum M. Simiae *monkey swim in kansas in the sun
What is different about the clinical presentation of scabies in kids vs adults?
Can see it on the scalp and face in kids
Warthin-Starry stain
Bacillary Angiomatosis
Treatment for Glanders
Streptomycin
What to treat erythrasma with? And what is it caused by
Caused by corynebacterium minutissimum and you treat with topical clindamycin
Treatment for Tularemia
Streptomycin
Ketoconazole - fungistatic or fungicidal?>
Fungistatic
Buruli ulcer
M. Ulcerans (atypical mycobacteria) presents as a growing ulcer on the abdomen of a child in Africa. Treatment is excision
Leptospira interrogans
Leptospirosis
Bacteria causing Granuloma inguinale
Calymmatobacterium granulomatosis (related to Klebsiella)
Treatment for Cryptococcus?
Amphotericin B +/- flucytosine
Painful pretibial plaques
Leptospirosis
what infectious disease do hunters get?
Tularemia
Gram negative intracellular bacteria Transmitted by insects Adheres to and invades erythrocytes
Bartonella
Which types of Leichmaniasis cause Visceral (Kala-azar)?
L. Donovani L. Infantry L. Changasi
Name the bacteria and vectors for all of the bartonella causing diseases:
- Oroya fever - bartonella bacilliformis - sandfly(Lutzomyia verrucarum) 2. Cat scratch disease - bartonella henselae - cat flea(ctenocejphalidis felis) 3. Bacillary angiomatosis - bartonella henselae, quintana - ticks, lice, fle 4. Trench fever - bartonella quintana - body louse (pediculus humanas)
What is the aminoglycoside used to treat glanders, brucellosis, plague, ratbite fever, tularemia
Streptomycin
People with HLA-DR2, HLA-DR3 are more prone to form which type of leprosy?
Tuberculoid (TH1 response)
Tick that carries RMSF
Dermacentor andersoni (wood tick western US) Dermacentor variabilis (dog tick in eastern US)