Welcome to your MLT- Professional Name: Email: Phone Number: [Anaerobic gram-positive diphtheroids (nonspore formers) were cultured from two separate blood culture bottles (at 5 days) obtained from a 25-year-old patient admitted to the hospital with dehydration, diarrhea, and other flulike symptoms. Four other blood culture bottles did not grow any organisms at 7 days and were discarded. The following results were obtained from the recovered anaerobe: Indole = + Nitrate = + Catalase = + Kanamycin = Sensitive Vancomycin = Sensitive Colistin = Resistant Major acid from PYG broth by GLC = Propionic acid What is the correct identification?] Eubacterium lentum Propionibacterium acnes Actinomyces spp. Peptostreptococcus spp. None . [A small, gram-negative coccobacillus recovered from the CSF of a 2-year-old child gave the following results: Indole = + Glucose = + (acid) X requirement = + V requirement = + Urease = + Lactose = Neg Sucrose = Neg Hemolysis = Neg Which is the most likely identification?] Haemophilus parainfluenzae Haemophilus influenzae Haemophilus ducreyi Haemophilus aphrophilus None . [Additional information typically required on a nonblood specimen label includes the:] billing code. party to be charged. physician. specimen type. None . [Direct spread of pneumonic plague disease occurs by which route?] Fecal–oral route Rat bite Ingestion of contaminated tissue Inhalation of contaminated airborne droplets None . [A patient developed a combination of Rh antibodies: anti-C, anti-E, and anti-D. Can compatible blood be found for this patient?] It is almost impossible to find blood lacking the C, E, and D antigens rr blood could be used without causing a problem R0R0 may be used because it lacks all three antigens Although rare, ryr blood may be obtained from close relatives of the patient None . [When an erythrocyte containing iron granules is stained with Prussian blue, the cell is called a:] Spherocyte Leptocyte Schistocyte Siderocyte None . [Which increase in antibody titer (dilution) best indicates an acute infection?] From 1:2 to 1:8 From 1:4 to 1:16 From 1:16 to 1:256 From 1:64 to 1:128 None . [Which method of DNA analysis is used most often to detect the hemoglobin S gene?] FISH PCR followed by RFLP Cytogenetic analysis of chromosome 11 Labeled probe painting of chromosome 11 None . [Variation in colony types seen with fresh isolates of Neisseria gonorrhoeae and sometimes with Neisseria meningitidis are the result of:] Multiple nutritional requirements Pili on the cell surface Use of a transparent medium All of these options None . [What is the purpose of C3a, C4a, and C5a, the split products of the complement cascade?] To bind with specific membrane receptors of lymphocytes and cause release of cytotoxic substances To cause increased vascular permeability, contraction of smooth muscle, and release of histamine from basophils To bind with membrane receptors of macrophages to facilitate phagocytosis and the removal of debris and foreign substances To regulate and degrade membrane cofactor protein after activation by C3 convertase None . [Which is most likely a positive Western blot result for infection with HIV?] Band at p24 Band at gp60 Bands at p24 and p31 Bands at p24 and gp120 None . [Which of the following would be most likely to allow reflux to occur during venipuncture?] Filling the tube stopper end-first Lateral redirection of the needle Tourniquet release on blood flow Using the wrong order of draw None . [The D-xylose absorption test is used for the differential diagnosis of which two diseases?] Pancreatic insufficiency from malabsorption Primary from secondary disorders of glycogen synthesis Type 1 and type 2 diabetes mellitus Generalized from specific carbohydrate intolerance None . [Argatroban may be used as an anticoagulant drug in patients with:] DVT Hemorrhage TTP Thrombocytosis None . [What is a general definition for autoimmunity?] Increase of tolerance to self-antigens Loss of tolerance to self-antigens Increase in clonal deletion of mutant cells Manifestation of immunosuppression None . [Which of the following drugs are first-line antibiotics used to treat classic tuberculosis for which susceptibility testing is performed by the disk diffusion method on Middlebrook 7H10 or 7H11 agar plates?] Ampicillin, penicillin, streptomycin, and carbenicillin Ampicillin, penicillin, and methicillin Vancomycin, methicillin, and carbenicillin Isonicotinic acid hydrazide (INH), rifampin, ethambutol, and pyrazinamide None . [Which urine color is correlated correctly with the pigment-producing substance?] Smoky red urine with homogentisic acid Dark amber urine with myoglobin Deep yellow urine and yellow foam with bilirubin Red-brown urine with biliverdin None . [Interpret the following results for HIV infection. ELISA: positive; repeat ELISA: negative; Western blot: no bands] Positive for HIV Negative for HIV Indeterminate Further testing needed None . [Primary infections with the microsporidia may originate in:] The lung The nervous system The gastrointestinal tract Mucocutaneous lesions None . [Cystitis means:] blueness of the skin. cellular infection. infl ammation of the bladder. pertaining to a cell. None . [The medical term for red blood cell is:] erythrocyte. hepatocyte. leukocyte. thrombocyte. None . [Which of the following values is the threshold critical value (alert or action level) for high plasma sodium?] 150 mmol/L 160 mmol/L 170 mmol/L 180 mmol/L None . [Cerebrospinal fluid (CSF) is formed by ultrafiltration of plasma through the:] Choroid plexus Sagittal sinus Anterior cerebral lymphatics Arachnoid membrane None . [Which mycobacterium is associated with Crohn’s disease?] M. marinum M. paratuberculosis M. avium M. gordonae None . [Which procedure is appropriate for culture of genital specimens in order to recover Chlamydia spp.?] Inoculate cycloheximide-treated McCoy cells Plate onto blood and chocolate agar Inoculate into thioglycollate (THIO) broth Plate onto modified Thayer–Martin agar within None . [Select the five pharmacological parameters that determine serum drug concentration.] Absorption, anabolism, perfusion, bioactivation, excretion Liberation, equilibration, biotransformation, reabsorption, elimination Liberation, absorption, distribution, metabolism, excretion Ingestion, conjugation, integration, metabolism, elimination None . [A person presents with a cushingoid appearance and an elevated 24-hour urinary cortisol level. The plasma adrenocotropic hormone (ACTH) is very elevated, and the physician suspects the cause is ectopic ACTH production. Which test would be most useful in substantiating this diagnosis?] Plasma cortisol CA-50 Alkaline phosphatase isoenzymes AFP None . [Which of the following enzymes is usually depressed in liver disease?] Elastase-1 GLD Pseudocholinesterase Aldolase None . [A flow cytometry scattergram of a bone marrow sample shows a dense population of cells located in-between normal lymphoid and normal myeloid cells. What is the most likely explanation?] The sample was improperly collected An abnormal cell population is present The laser optics are out of alignment The cells are most likely not leukocytes None . [Select the medium best suited for the recovery of Yersinia enterocolitica from a patient with gastroenteritis.] Hektoen agar Cefsulodin–Irgasan–Novobiocin (CIN) agar Blood agar Eosinmethylene blue agar None . Time's up
