Answer: C. Chagas disease
Explanation:
Xenodiagnosis is a method of diagnosis and detection of the microorganism responsible for infecting the tissues of the body.
Chagas disease is a potentially life threatening disease. It is caused by the protozoan parasite called as Trypanosoma cruzi. It is transmitted to people through the feces of insects. This disease is common in South and Central America and in Mexico. The xenodiagnosis is used to detect the parasite responsible for the Chagas disease.
The structure contains cells is blood<span />
The correct answer is "plasma cells".
Plasma cells are differentiated or mature B cells capable of producing antibodies against a particular foreign substance. B cells are stimulated to differentiate into plasma cells when it binds to two receptors of helper T cell; having the T cells "help" the B cells to differentiate to plasma cells. These T cells have the antigenic information passed to them by antigen presenting cells such as dendritic cells and these will be passed to the B cells and plasma cells will produce antibodies against this specific antigen.
