Case 4 Tom has just been exposed to the measles virus, and he can not remember i

Question

Case 4 Tom has just been exposed to the measles virus, and he can not remember if he has measles before or if he received a vaccination when he was a kid. He asks you if there is any way he can tell if he has been previously exposed or if he is going to get sick.

In the figure, "a" indicates time of exposure, graph "b" indicates the IgM levels and graph "c" indicates the IgG levels that were measured in Tom's blood after his exposure to the virus.

Choose the statement that is correct if Tom received a vaccination for the measles:

A. If Tom was vaccinated with an artificial passive vaccine, the graph would look the same as if Tom had the measles.

B. If Tom was vaccinated with an artificial passive vaccine, his blood will show very high levels of both IgG and IgM when exposed to the disease.

C. If Tom was vaccinated with an artificial active vaccine, his blood will show very high levels of IgM and low levels of IgG when exposed to the disease.

D. If Tom was vaccinated with an artificial active vaccine, the graph would look the same as if Tom had the measles.

Case 4 - Tom has just been exposed to the measles virus, and he can't remember if he has had measles before or if he received a vaccination when he was a kid. He asks you if there is any way he can tell if he has been previously exposed or if he is going to get sick. In the Figure, “a" indicates time of exposure, graph "b" indicates the IgM levels and Graph "c" indicates the IgG levels that were measured in Tom's blood after his exposure to the virus. Antibody titer 40. How can you know by looking at the graph if Tom had the measles? A. if Tom has previously had the measles, there should be a significant amount of IgM antibody in his blood B. if Tom has previously had the measles, there should be a significant amount of IgG antibody in his blood C. if Tom has previously had the measles, the levels of IgM and IgG should be the same. D. There is no way that Tom can know if he had the measles by checking antibodies levels in his blood.

Explanation / Answer

Answer is D

If Tom was vaccinated with an artificial active vaccine, the graph would look the same as if Tom had the measles.

Tom was previously exposed to the adaptive immunity against the measles.

If a person on subsequent exposure to the disease, the antibodies in the body that is IgG antibodies are higher and IgM are lower level. In normal vaccination graph also observed that there is the high level of IgG and low level of IgM antibodies on secondary exposure.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.