Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
ID Labs 2
Infectious Disease
| Question | Answer |
|---|---|
| Indirect immunofluorescent antibody, Weil-Felix reaction, and complement are tests for: | RMSF (Rickettsia rickettsia) |
| Histoplasmosis CBC | Organism in neutrophils & monocytes on Wright-Giemsa PBS; in macrophages on bone marrow smear |
| Histoplasmosis labs | high alk phos, LDH, ferritin; anemia of chronic dz; pancytopenia |
| Tests for Cryptococcus | cryptococcal Ag in CSF/serum; India ink or serology w/latex agglutination; CRAG |
| RMSF labs | CSF: pleocytosis & hypoglycorrhachia. Low platelets & Na, high LFTs & bili. Serum IFA to confirm dx (may not see Ab response for 2 weeks) |
| Clustered bacteria in vacuoles in WBCs; low platelets; leukopenia w/left shift; high LFTs; rising Ab immunofluorescence titer | Ehrlichiosis |
| Histoplasmosis CBC | Organism in neutrophils & monocytes on Wright-Giemsa PBS; in macrophages on bone marrow smear |
| Aspergillosis Dx test: | Bx of lesion |
| Large septate hyphae that branch at a 45 degree angle: | Aspergillus (eg, A fumigatus) |
| Organism grows thick-walled cells with single broad-based bud: | Blastomyces |
| Histoplasmosis labs | Anemia of chronic dz. Pancytopenia, high alk phos, LDH, transferrin in disseminated dz. |
| Sputum cx in Histoplasmosis is usually: | Negative |
| Histoplasmosis labs in immunocompromised patients | BM & blood cx usually positive. AIDS pt with disseminated dz: urine antigen assay 90% sensitive |
| Giardiasis labs | 3 stool specimens each 2 days apart: O&P for cyst & troph. Antigen test cheaper, less sensitive & will not detect other organisms |
| Malaria labs | Thin & thick PBS Q8h x3 days for dx & TOC. Rapid antigen test. High then low WBC, high monocytes, possibly anemia & high LFTs |
| CT or MRI showing ring-enhancing lesions in the brain (corticomedullary junction or basal ganglion) suggests: | Toxoplasmosis (often in immunocompromised pt) |
| Thick white vaginal discharge, hyphae & buds on KOH prep | Candida |
| Test of choice for MAC | Blood cultures (98% sensitivity) |
| Hansen disease may see false positives in these tests | Syphilis, antithyroglobulin Ab, RF |
| Tetanus labs | Moderate leukocytosis, normal CSF, normal Ca |
| Lyme labs | ELISA (serum Ab) with western blot to confirm. Half of pts neg Ab in first few weeks |
| Glanders labs | Serology preferred. 16s rRNA gene sequencing for rapid ID. |
| Glanders on CXR | Military nodules, lung abscesses, lobar, or bronchopneumonia |
| GNR demonstrating bipolar “safety pin” staining with Wright, Giemsa, or Wayson stain = | Yersinia pestis (grows best on blood agar or MacConkey at 35C) |
| Q fever labs | Requires special reference lab testing. TOC is indirect immunofluorescence. Also ELISA & complement fixation. High RF, CRP, ESR +/- LFTs & WBC |
| Smallpox labs | Testing at high-containment (BL-4) facility. Electron microscopy to confirm. |
Created by:
Abarnard
Popular Laboratory Science sets