Question

Nester etal MICROBIOLOGY: A Human Perspective Case Study-Chapter 21 Respiratory System Infectious 5-year-old Hispanic man presented to his family physician with fever which had persisted over 4 days. He had no history of fevers lasting this long. He had contracted tuberculosis when he was 17, but he had no family history of TB. He had taken no medications. He was a smoker and occasionally drank alcohol. He described to his doctor that 2 days prior, he suddenly developed chills and a sore throat with a fever (39.4 °C). A rapid test for influenza was negative. He was prescribed acetaminophen, however the fever persisted, and the man returned to his family physician the next day. Blood tests were done which showed that his white blood cell (WBC) count was elevated (12,000 U/L) along with other tests that indicated inflammation. Although an oral cephalosporin was prescribed, his fever did not improve, and he was subsequently admitted to the hospital. A 3 On admission, laboratory tests showed a high WBC count among other tests that showed inflammation. Rapid antigen tests for influenza, pneumococcus, and mycoplasma were negative. A sputum was also collected for culture for general and acid-fast bacilli. He was initially diagnosed with bronchopneumonia. Intravenous administration of levofloxacin (LVFX, 600 mg/day) and ampicillin/sulbactam (ABPCISBT, 7 g/day) was started. On the second day after admission, the patient's temperature began to subside The sputum smear was negative for acid-fast bacill; however, catalase negative beta-hemolytic, Gram-positive cocci in chains were detected in the blood cultures and sputum cultures. Other biochemical tests showed susceptibility to Taxo-A CAMP test negative, positive PYR,and negative Na hippurate. 1. What is the diagnosis of this patient? a. Sepsis due to bacterial infection b. Bacterial bronchopneumonia and bacteremia

Answer 1

Q 1. Answer is B

REASON: investigation findings gram -positive cocci shows in the blood that shows infection so answer is bacterial bronchopneumonia and bacteremia.

Q 2 . Answer is A

REASON: presence of symptoms like fever and sore throat shows the infection of streptococcus pyogenes to the patient

Q 3. Answer  is B

REASON; S.agalactiae is beta hemolytic whereas S.viridans is alpha hemolytic

Q 4. Answer is A

REASON; penicillin and cephalosporins are the antibiotics that work against S. pyogenes bacteria

Q 5. Answer is A

REASON ; S. pyogenes causes complication like glomerulophritis