Chapter·MicrobiologyGram-positive

Group B streptococciDownloads

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1

A neonate born at 33 weeks is transferred to the NICU after a complicated pregnancy and C-section. A week after being admitted, he developed a fever and became lethargic and minimally responsive to stimuli. A lumbar puncture is performed that reveals the following: Appearance Cloudy Protein 64 mg/dL Glucose 22 mg/dL Pressure 330 mm H20 Cells 295 cells/mm³ (> 90% PMN) A specimen is sent to microbiology and reveals gram-negative rods. Which of the following is the next appropriate step in management?

AMRI scan of the head

BStart the patient on IV ceftriaxone

CProvide supportive measures only

DStart the patient on IV cefotaxime

EStart the patient on oral rifampin

2

A 14-year-old male is brought to the Emergency Department by his mother. She is worried because his face has become puffy and his urine has turned a tea-color. Patient history reveals the child recently suffered from a sore throat. The physician suspects a bacterial infection. Which of the following describes the likely bacteria responsible?

AGram negative

BBacitracin insensitive

CCatalase positive

DBeta-hemolytic

ECoagulase positive

3

A 27-year-old woman, gravida 2, para 1, at 37 weeks' gestation is admitted to the hospital in active labor. She has received routine prenatal care, but she has not been tested for group B streptococcal (GBS) colonization. Pregnancy and delivery of her first child were complicated by an infection with GBS that resulted in sepsis in the newborn. Current medications include folic acid and a multivitamin. Vital signs are within normal limits. The abdomen is nontender and contractions are felt every 4 minutes. There is clear amniotic fluid pooling in the vagina. The fetus is in a cephalic presentation. The fetal heart rate is 140/min. Which of the following is the most appropriate next step in management?

AObtain vaginal-rectal swab for nucleic acid amplification testing

BObtain vaginal-rectal swab for GBS culture

CAdminister intrapartum intravenous penicillin

DReassurance

EObtain vaginal-rectal swab for GBS culture and nucleic acid amplification testing

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