laboratory diagnostic tests for bacterial infections

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widal test is a laboratory diagnostic test for which disease (a) cholera (b) syphilis (c) typhoid fev 0er (d) shigellosis a specific test for diagnosis of syphilis is: a. vdrl b. fta-abs c. rpr d. none what is the key test that separates staphylococcus aureus from other staphylococci? a. baciteracin test c. growth on blood agar b. mannose fermentation d. coagulase test how are the streptococci differentiated from the staphylococci when viewed microscopically following the gram stain procedure? a. staphylococci are gram positive, while streptococci are gram negative. b. staphylococci are gram positive and grow in grape-like clusters, while streptococci are also gram positive, but grow in chains. c. staphylococci are gram positive cocci, while streptococci are gram positive bacilli. d. staphylococci are gram negative bacilli, while streptococci are gram negative cocci. a culture of skin lesions from a patient with pyoderma shows numerous colonies surrounded by a zone of …

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acteristics rate. the preceding period of this cell division is the: a. exponential growth phase b. stationary phase c. logarithmic phase d. lag phase 3. the components of a decolorizer used in afb are a. acetone and ethanol b. hydrochloric acid and acetone c. ethanol and hydrochloric acid d. sulphuric acid and hydrochloric acid 4. as a scientist you work in a research laboratory and discover a chemical that removes the cell wall from bacteria but leaves the organism undamaged otherwise. things that the bacteria will lose because of this include: a. the ability to stain gram positive b. the ability to move c. the ability to have a gram stain result d. the ability to attach to other cells 5. to select and prescribe the appropriate antimicrobial for a specific infectious bacterial agent microbiologists should perform antimicrobial susceptibility test. standardized testing conditions for the kirby-bauer agar-disk diffusion antimicrobial susceptibility …

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is best diagnosed by serologic means? a. pulmonary tuberculosis b. gonorrhea c. typhoid feve d. typhus 11. for identification of a specific bacterial genus/species we need to perform biochemical or enzamytic tests. the cogulase test is used to differentiate a. staphylococcus epidermidis from neisseria meningitides b. staphylococcus aureus from staphylococcus epidermidis c. streptococcus pyogens from staphylococcus aureus d. streptococcus pyogens from enterococcus faecalis 12. all activities are performed in a health center for dispatch of specimens to a microbiology laboratory except: a. make a smear of a specimen on the slide for gram staining b. collect the appropriate specimens and transport using transport media c. perform gram staining and send the stained slide for identification d. label and send the specimens to reach microbiology laboratory with in 6 hrs 13. the laboratory technologist reports that the venereal disease research laboratory (vdrl) test performed on the pregnant mother is reactive at …

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the best answer and write the answer on the answer sheet. 1. sodium fluoride-oxalate will be used for collection of blood specimen for glucose test because a). it helps to minimize hemolysis b). it can also used for electrolyte & enzymes testing c). it helps for measuring glucose by glucometer d). it prevents glycolysis 2. its value in the diagnosis of myocardial infarction lies in the prolongation of its increased activity a). ck b). alp c). ast d). ldh 3. which of the following enzyme is more specific for liver? a). alt b). alp c). ast d). ldh 4. in the diagnosis of cutaneous leishmaniasis, biopsy is better taken from : a. base of the ulcer b. edge of the ulcer c. skin around the ulcer d. center of ulcer 5. modified ziehl-neelsen stain is recommended to demonstrate: a. giardia trophozoites in patient’s stool b. microsporidia spores in patients’s stool …

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rral hospital a 35 years old aids patient with a cd4 count in the range 100 to 50 cells /mm3 complains of headache and neck stiffness and appears disoriented. the possibility of fungal meningitis is considered and tests for the common fungal etiology of meningitis ordered. tests included direct examination of spinal fluid for the organism and serology. the purpose of the serology test is detection of a. antibody to capsular polysaccharide b. antibody to cell wall mannoprotein c. capsular polysaccharide d. cell wall mannoprotein 13. gram stain examination of a csf specimen indicates the presence of yeast like cells with gram positive granular inclusions.which of the following techniques should be used next to assist in the identification of this organism? a. 10%koh b. lactophenol cotton blue c. indian ink d. periodic acid-schif 14. antimicrobial resistance: a. can only be acquired through plasmid transfer b. means that one species of …

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widal test is a laboratory diagnostic test for which disease (a) cholera (b) syphilis (c) typhoid fev 0er (d) shigellosis a specific test for diagnosis of syphilis is: a. vdrl b. fta-abs c. rpr d. none what is the key test that separates staphylococcus aureus from other staphylococci? a. baciteracin test c. growth on blood agar b. mannose fermentation d. coagulase test how are the streptococci differentiated from the staphylococci when viewed microscopically following the gram stain procedure? a. staphylococci are gram positive, while streptococci are gram negative. b. staphylococci are gram positive and grow in grape-like clusters, while streptococci are also gram positive, but grow in chains. c. staphylococci are gram positive cocci, while streptococci are gram positive bacilli. …

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