When evaluating a patient for sexually transmitted infections (STIs), the nurse should be aware that the most common bacterial STI is:

Choice A reason: Seizure activity and hypotension are not signs and symptoms of severe preeclampsia, but rather of eclampsia, which is a life-threatening complication of preeclampsia. Eclampsia is characterized by convulsions and coma, and it requires immediate treatment to prevent maternal and fetal death.

Choice B reason: Platelet count of less than 100,000/mm3 and visual problems are signs and symptoms of severe preeclampsia, as they indicate hematologic and neurologic complications. Severe preeclampsia can cause thrombocytopenia, which is a low platelet count that increases the risk of bleeding. It can also cause cerebral edema, which can impair the vision and cause blurred vision, spots, or flashes of light.

Choice C reason: Ankle clonus and epigastric pain are signs and symptoms of severe preeclampsia, as they indicate neuromuscular and hepatic complications. Severe preeclampsia can cause hyperreflexia, which is an exaggerated reflex response that can be elicited by dorsiflexing the ankle and observing rhythmic jerking of the foot. It can also cause liver damage, which can manifest as epigastric pain or right upper quadrant pain.

Choice D reason: Decreased urinary output and irritability are signs and symptoms of severe preeclampsia, as they indicate renal and central nervous system complications. Severe preeclampsia can cause oliguria, which is a reduced urine output of less than 500 mL in 24 hours. It can also cause increased intracranial pressure, which can affect the mood and behavior and cause irritability, anxiety, or confusion.

Choice E reason: Transient headache and +1 proteinuria are not signs and symptoms of severe preeclampsia, but rather of mild preeclampsia, which is a less severe form of the condition. Mild preeclampsia is characterized by blood pressure of 140/90 mm Hg or higher, proteinuria of 1+ or higher, and mild edema. It does not cause severe complications or organ damage, but it can progress to severe preeclampsia if not treated.

Choice A reason: Quickening is the first perception of fetal movement by the mother, usually occurring between 16 and 20 weeks of gestation. It is a presumptive sign of pregnancy, as it can be subjective and influenced by other factors such as gas or peristalsis.

Choice B reason: A positive pregnancy test is a probable sign of pregnancy, as it indicates the presence of human chorionic gonadotropin (hCG) in the urine or blood. However, it is not conclusive, as it can be affected by false positives or false negatives, or by other conditions that produce hCG.

Choice C reason: Braxton Hicks contractions are irregular, painless uterine contractions that occur throughout pregnancy. They are a probable sign of pregnancy, as they indicate uterine activity and preparation for labor. However, they are not diagnostic, as they can also occur in non-pregnant women or in response to other stimuli.

Choice D reason: Fetal movement palpated by the nurse-midwife is a positive sign of pregnancy, as it confirms the presence of a living fetus in the uterus. It is an objective and reliable sign that can be detected by a skilled examiner after 20 weeks of gestation.