General microbiology

A. Salmonella B. Escherichia C. Shigella D. Yersinia E. Brucella
43. After inoculation of the material obtained from the pharynx of an angina patient onto the blood-tellurite agar, grey colonies could be observed. They were 4-5 mm in diameter, radially striated (in form of rosettes). Microscopical examination revealed gram-positive bacilli with clavate swollen ends arranged in form of wide-spread fingers. Identify these microorganisms:
A. Diphtheria corynebacteriae B. Clostridium botulinum
C. Diphtheroids D. Streptococci E. Streptobacilli
44. Inoculum from pharynx of a patient ill with angina was inoculated into bloodtellurite agar. It resulted in growth of grey, radially striated (in form of rosettes) colonies 4-5 mm in diameter. Grampositive bacilli with clublike thickenings on their ends placed in form of spread wide apart fingers are visible by microscope. What microorganisms are these?
A. Diphtheria corynebacteriae B. Botulism clostridia
C. Diphtheroids D. Streptococci E. Streptobacilli
45. A sample taken from the pharynx of a patient with angina was inoculated on the blood-tellurite agar. This resulted in growth of grey, radially striated (in form of rosettes) colonies up to 4-5 mm in diameter. Microscopically there can be seen gram-positive rods with club-shaped ends arranged in form of spread fingers. What microorganisms are these?
A. Corynebacteria diphtheriae B. Clostridium botulinum
C. Diphtheroids D. Streptococci E. Streptobacilli
46. Blood of a patient with presumable sepsis was inoculated into sugar broth. There appeared bottom sediment. Repeated inoculation into blood agar caused growth of small transparent round colonies surrounded by hemolysis zone. Examination of a smear from the sediment revealed gram-positive cocci in form of long chains. What microorganisms are present in blood of this patient?
A.Streptococci B.Micrococci C.Staphylococci D.Tetracocci E.Sarcina
47. Examination of a patient with pustular skin lesions allowed to isolate a causative agent that forms in the blood agar roundish yellow middle-sized colonies surrounded by haemolysis zone. Smears from the colonies contain irregular-shaped clusters of gram-positive cocci. The culture is oxidase- and catalasepositive, ferments mannitol and synthesizes plasmocoagulase. What causative agent was isolated?