Which of the following is transmitted through direct contact with the blood or body fluid of someone who is infected (usually through unprotected sex, sharing needles, or passed from a mother to a baby at birth)? Symptoms may take 10 years or more to show. Once they appear, the person is susceptible to life-threatening infections.

Choice A reason: Herpes simplex virus is incorrect because it is not the infection described in the question. It is transmitted through direct contact with the skin or mucous membranes of someone who is infected, usually through oral or genital sex. Symptoms include painful blisters and sores in the mouth or genitals. It does not cause life-threatening infections, but it can increase the risk of other sexually transmitted infections.

Choice B reason: Human papillomavirus is incorrect because it is not the infection described in the question. It is transmitted through direct contact with the skin or mucous membranes of someone who is infected, usually through genital sex. Symptoms include genital warts and cervical cancer. It does not cause life-threatening infections, but it can increase the risk of other cancers.

Choice C reason: Human immunodeficiency virus is correct because it is the infection described in the question. It is transmitted through direct contact with the blood or body fluid of someone who is infected, usually through unprotected sex, sharing needles, or passed from a mother to a baby at birth. Symptoms may take 10 years or more to show. Once they appear, the person is susceptible to life-threatening infections, such as pneumonia, tuberculosis, or cancer. This condition is also known as acquired immunodeficiency syndrome (AIDS).

Choice D reason: Cytomegalovirus is incorrect because it is not the infection described in the question. It is transmitted through direct contact with the saliva, urine, or breast milk of someone who is infected, usually through kissing, sexual contact, or breastfeeding. Symptoms are usually mild or absent in healthy people, but they can be serious in people with weakened immune systems or unborn babies. It does not cause life-threatening infections, but it can cause birth defects, hearing loss, or vision problems.

Choice A reason: Insulin is the preferred medication for gestational diabetes mellitus, as it does not cross the placenta and has no adverse effects on the fetus. It can be administered subcutaneously or intravenously, depending on the blood glucose level and the type of insulin.

Choice B reason: Glipizide is an oral antidiabetic agent that belongs to the sulfonylurea class. It stimulates the pancreas to secrete more insulin and lowers the blood glucose level. However, it is not recommended for gestational diabetes mellitus, as it can cross the placenta and cause hypoglycemia, macrosomia, or teratogenic effects on the fetus.

Choice C reason: Acarbose is an oral antidiabetic agent that belongs to the alpha-glucosidase inhibitor class. It delays the absorption of carbohydrates from the intestine and reduces the postprandial blood glucose level. However, it is not recommended for gestational diabetes mellitus, as it can cause gastrointestinal side effects, such as flatulence, diarrhea, or abdominal pain, and may interfere with the absorption of other nutrients.

Choice D reason: Repaglinide is an oral antidiabetic agent that belongs to the meglitinide class. It stimulates the pancreas to secrete more insulin and lowers the blood glucose level. However, it is not recommended for gestational diabetes mellitus, as it can cross the placenta and cause hypoglycemia, macrosomia, or teratogenic effects on the fetus.