A nurse is reviewing the laboratory report for a client who is in active labor. The client tested positive for group B streptococcus B-hemolytic. Which of the following medications should the nurse plan to administer to the client?
Doxycycline.
Cefotetan.
Ampicillin.
Fluconazole.
The Correct Answer is C
The correct answer is c. Ampicillin.
Rationale:
- Group B Streptococcus (GBS) B-hemolytic is a bacterium that can colonize the vagina and rectum of pregnant women. While usually harmless to the mother, it can be passed to the newborn during birth and cause serious infections, including pneumonia, meningitis, and sepsis.
- Ampicillin is the first-line antibiotic recommended by the Centers for Disease Control and Prevention (CDC) for the prevention of GBS disease in newborns. It belongs to the penicillin class of antibiotics, which are highly effective against GBS and generally well-tolerated by pregnant women and newborns.
- Doxycycline is not recommended for GBS prophylaxis due to its poor penetration into amniotic fluid and potential for causing tooth discoloration and bone development problems in newborns.
- Cefotetan is an alternative option for women with penicillin allergy, but ampicillin is still preferred due to its lower cost and broader spectrum of activity against GBS strains.
- Fluconazole is an antifungal medication and has no activity against GBS bacteria.
Detailed Rationale for Each Choice:
a. Doxycycline:
- Rationale against:
- Poor penetration into amniotic fluid: Doxycycline does not effectively reach the amniotic sac, where the baby is surrounded, and therefore may not adequately protect the newborn from GBS infection.
- Adverse effects in newborns: Doxycycline can cause tooth discoloration and bone development problems in infants exposed in utero.
b. Cefotetan:
- Rationale for:
- Alternative for penicillin allergy: Cefotetan is a cephalosporin antibiotic effective against GBS and can be used in women with penicillin allergy.
- Rationale against:
- Second-line option: Ampicillin is the preferred choice due to its lower cost and broader spectrum of activity against GBS strains.
c. Ampicillin:
- Rationale for:
- First-line antibiotic: Ampicillin is the CDC-recommended first-line antibiotic for GBS prophylaxis due to its:
- High effectiveness against GBS: Ampicillin has a broad spectrum of activity against GBS strains.
- Good safety profile: Ampicillin is generally well-tolerated by pregnant women and newborns.
- Cost-effectiveness: Ampicillin is a relatively inexpensive antibiotic compared to other options.
- First-line antibiotic: Ampicillin is the CDC-recommended first-line antibiotic for GBS prophylaxis due to its:
d. Fluconazole:
- Rationale against:
- Antifungal medication: Fluconazole is an antifungal medication and has no activity against GBS, which is a bacterium.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Bright, red vaginal discharge is not a typical manifestation of an ectopic pregnancy. Instead, it can be indicative of other conditions such as miscarriage or vaginal bleeding.
Choice B rationale:
A scaphoid abdomen is not a typical manifestation of an ectopic pregnancy. A scaphoid abdomen is seen in cases of diaphragmatic hernia, where the abdominal organs move into the chest cavity, leaving the abdomen with a sunken appearance.
Choice C rationale:
Elevated blood pressure is not a typical manifestation of an ectopic pregnancy. High blood pressure can be associated with conditions like preeclampsia but is not specifically linked to ectopic pregnancies.
Choice D rationale:
Sharp pelvic pain is a common manifestation of an ectopic pregnancy. As the fertilized egg implants outside the uterus, often in the fallopian tube, it can cause pain and discomfort.
Correct Answer is D
Explanation
The correct answer is choice d. “The nurse should measure the newborn’s muscle tone when assigning an Apgar score.”
Choice A rationale:
The Apgar score is determined at 1 and 5 minutes after birth, not at 2 and 7 minutes.
Choice B rationale:
An Apgar score of 8 indicates that the newborn is in good health, not severe distress. Scores of 7-10 are considered normal.
Choice C rationale:
Resuscitation efforts should not be delayed until the first Apgar score is obtained. Immediate resuscitation is initiated if needed, regardless of the Apgar score.
Choice D rationale:
Muscle tone is one of the five criteria assessed in the Apgar score, along with appearance, pulse, grimace, and respiration.
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