Which statement about B-cell disorders is incorrect?
Which is not characteristic for T-cell dependent activation of B-cells?
A 55-year-old man arrives at the hospital, experiencing sudden difficulty breathing. Upon examination, swelling is observed in his face, hands, and feet. He recently began taking an ACE inhibitor for hypertension and initial heart failure. Due to forgetting yesterday's dose, he took both yesterday's and today's doses together. His wife mentions a history of similar, though less severe, swelling related to an immune deficiency disease. The emergency doctor suspects that the newly started ACE inhibitor may be exacerbating the existing immune deficiency. Which of the following deficiencies is most likely responsible for the patient's condition?
A 30-year-old patient visits the clinic with intense pain in his lower left leg that began two days ago. Upon examination, the leg appears red and swollen with well-defined borders. It is tender and warm to the touch. Laboratory tests indicate an increase in inflammatory markers, and blood culture is positive for Streptococcus pyogenes. The physician suspects Erysipelas based on clinical and laboratory findings and prescribes oral penicillin V (500mg every 6 hours). Two hours later, the patient experiences shortness of breath and widespread swelling, prompting an emergency visit. After assessing the airways, 0.3 mg/300 micrograms of intramuscular epinephrine is administered, leading to rapid improvement. What type of hypersensitivity reaction is most likely to have occurred?
During the summer season, a 50-year-old obese woman reports itchiness on the dorsal surfaces of both her hands, which resolves in colder temperatures. The physician suspects an allergic reaction. What is the most appropriate drug for this condition?
A 7-year-old boy, who immigrated to the United States six months ago, presents with fever, productive cough, shortness of breath, and chest pain. He has eczema on various body parts, and lung auscultation reveals ronchi. A chest X-ray shows diffuse infiltrates, raising suspicion of pneumococcal pneumonia. The child has no vaccination history. Physical examination and laboratory tests reveal high white blood cell count, elevated inflammatory markers, and thrombocytopenia. The mother, communicating through a translator, reports that the child has experienced recurrent infections since infancy and tends to bleed easily. Sputum culture further reveals a positive result for Streptococcus pneumoniae. Which of the following immune deficiencies is most consistent with this presentation?
Which of the statements is not correct?
