The antibiotic susceptibility testing results of Staphylococcus showed zones of inhibition (absence of growth on zones) around discs of Penicilin, Teracycline, chloramphenicol, this means that  a) S. aueres is resistant to all these antibiotics. b) S. aueres is susceptible to all these antibiotics. c) susceptible to only a couple of them d) neither are the correct choices

Why is it only necessary to include the exotoxin (in toxoid form) in vaccines for tetanus and botulism?

Which of the following statements about antibiotics is TRUE? a) Antibiotics are used to disinfect bench tops.b) An antibiotic is a type of antiseptic.c) Some antibiotics inhibit the growth of a pathogen and do not kill it.d) Some antibiotics work by binding the 40S ribosomal subunit.e) Antibiotics are used to treat fungal infections.

22) Which of the techniques/characteristics below may be used to identify a target bacterium in a pool of microorganism? a) its morphology b) its growth requirement c) antibody-antigen interaction ) d) all of the above. ) e) a and c 23) What is the process that produces alcohol in S. cerevisiae (yeast)? () a) Respiration ( b) Sedimentation c) Photosynthesis )d) Fermentation 24) Identify the most mistaken (wrong) choice: a) Halophiles are those organisms that like high salt concentrations. ) b) Some bacteria reproduce by binary fission. ( c) A fungus cell contains a true nucleus. d) During the lag phase of growth, the metabolic activity is very low

GROWTH OF FUSOBACTERIUM ON KANAMYCIN/VANCOMYCIN AGAR (KV) CAN BE DESCRIBED AS a) pigmented b) black c) hemolytic d) inhibited (no growth)

How could you determine if an isolated Staphylococcus aureus is resistant to antibiotics methicillin or vancomycin?

This pathogen is usuall foodborne and causes a mostly asymptomic disease. The most common foods associated with it are deli meats and unpasteurized dairy products. It rarely cause meningitis and spsis. It is mainly of concern because it can lead to still birth. This pathogen is  a) Stahylococcus aureus b) Streptococci pneumoniae c) Listeria monocytogens  d) Streptocpccus pyogenes

Resistance to antimicrobial agents is more commonly seen in hospital-acquired infections with enteric bacteria than in community-based infections with the same species. Explain why this is so.

20) Biological control of Salmonella is by using: a) E. Coli (ETEC Strain) b) Shigella c) Bdellovibrio d) Plasmodium e) Spirillum 23) Salmonella typhi and Staphylococcus aureus are two species used in: a) Toxin-mediated killing b) Viral mediated lysis c) Predation-mediated killing d) Autoclave effectiveness evaluation e) Phenol Coefficient test 25) The gas that has been used recently used to decontaminate biological safety cabinets is: a) EtO b) Beta-propiolactone c) NO Gas d) N2O Gas e) Vapor-phase H2O2

This petri plate shows the susceptibility of Staphylococcus aureus to different antibiotics. Which antibiotic is least effective?   a)  Methicillin - Meth   b)  Control   c)  All are ineffective   d)  Ampicillin - Amp   e)  Vancomycin - Van