Present in chronic bacterial infection?

Correct Answer: A

Rationale: Neutrophilia is the correct answer for chronic bacterial infection. Neutrophils are the first responders to bacterial infections, leading to an increase in their count. Basophils are involved in allergic reactions, not bacterial infections. Lymphocytosis is seen in viral infections. Eosinophilia is associated with parasitic infections and allergic responses.

Correct Answer: B

Rationale: The correct answer is B: Leukemoid reaction. Döhle bodies are blue-gray cytoplasmic inclusions seen in neutrophils, indicating rough endoplasmic reticulum disruption. Leukemoid reaction is a benign condition with elevated white blood cell count due to infections, inflammation, or stress. In chronic myeloid leukemia (A), abnormal myeloid cells are present but not Döhle bodies. Chediak-Higashi syndrome (C) is a rare genetic disorder with giant granules in neutrophils, not Döhle bodies. Infectious mononucleosis (D) shows atypical lymphocytes but not Döhle bodies.

Correct Answer: C

Rationale: The correct answer is C: Partial Thromboplastin Time (PTT). Hemophilia is a bleeding disorder due to deficiency of clotting factors. PTT specifically measures the intrinsic pathway of coagulation, which is affected in hemophilia. Prothrombin time (A) measures the extrinsic pathway, not specific for hemophilia. Bleeding time (B) assesses platelet function, not relevant for hemophilia. Platelet count (D) evaluates the number of platelets, not the clotting factor deficiency seen in hemophilia.

Correct Answer: A

Rationale: Step 1: Type 1 hypersensitivity is an immediate allergic reaction. Step 2: IgE antibodies are responsible for triggering Type 1 hypersensitivity reactions. Step 3: IgG is not involved in Type 1 hypersensitivity. Step 4: Delayed reactions (Choice C) are not characteristic of Type 1 hypersensitivity. Therefore, the correct answer is A: IgE, as it is the key mediator of Type 1 hypersensitivity reactions. Choices B and C are incorrect because IgG is not involved and Type 1 hypersensitivity is not a delayed reaction. Choice D is incorrect because it includes choices B and C, which are not relevant to Type 1 hypersensitivity.

Correct Answer: C

Rationale: The correct answer is C: Prothrombin time 28 seconds. A prolonged prothrombin time indicates impaired blood clotting function, posing a higher risk of bleeding. This is a critical issue that requires immediate attention to prevent severe complications. INR of 2.8 (choice A) is slightly elevated but not as urgent as PT. Platelet count of 128,000/mm³ (choice B) is low but not an immediate concern unless it drops further. RBC count of 5.1 million/L (choice D) is within the normal range and does not indicate an urgent issue.