Which of the following statements about Group B Streptococcus (GBS) in pregnancy is true?
GBS can only be transmitted to the baby during cesarean delivery.
GBS is a common bacterium found in the vaginal flora of women and is harmless in all cases.
Screening for GBS is typically performed at the first prenatal visit.
Intravenous antibiotics during labor are recommended for GBS-positive mothers to prevent neonatal infection.
The Correct Answer is D
Choice A rationale
GBS can be transmitted to the baby during both vaginal and cesarean deliveries if the mother is colonized with the bacteria. It is not limited to cesarean sections, hence why appropriate screening and treatment are essential.
Choice B rationale
GBS, although often harmless in the general population, can cause severe infections in newborns. This bacterium can be a source of severe neonatal infections like sepsis, pneumonia, and meningitis, necessitating preventive measures during pregnancy and delivery.
Choice C rationale
Screening for GBS is typically performed between 35 and 37 weeks of gestation, not at the first prenatal visit. This timing ensures accurate detection of the bacteria closer to the time of delivery.
Choice D rationale
Intravenous antibiotics during labor are recommended for mothers who test positive for GBS to prevent transmission to the baby. This intervention significantly reduces the risk of neonatal GBS infection.
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Correct Answer is C
Explanation
Choice A rationale
Clapping hands to assess hearing is not a reliable method and could startle the baby for reasons unrelated to hearing ability.
Choice B rationale
While a newborn might respond to visual stimuli, this is not a definitive method to assess hearing.
Choice C rationale
Routine hearing screenings using objective tests are the best way to determine a newborn's hearing ability, providing accurate and early detection of potential hearing issues.
Choice D rationale
This statement is misleading, as some forms of hearing loss can be inherited. It's important to use accurate methods to assess newborn hearing.
Correct Answer is D
Explanation
Choice A rationale
Breast tenderness is considered a presumptive sign of pregnancy, as it can result from hormonal changes, but it is not definitive enough to confirm pregnancy.
Choice B rationale
Fetal heart tones detected by ultrasound are a positive sign of pregnancy. However, it is not a probable sign as it is definitive evidence of an existing pregnancy.
Choice C rationale
Fetal movement, often felt later in pregnancy, is a positive sign. It indicates an existing pregnancy but is not used to initially diagnose pregnancy.
Choice D rationale
A positive urine pregnancy test is a probable sign of pregnancy. It detects the presence of hCG (human chorionic gonadotropin), a hormone produced during pregnancy, and is a widely used indicator of probable pregnancy. .