Correct Answer: C

Rationale: Typhoid fever is primarily spread through contaminated food and water, usually due to poor sanitation practices. The bacteria responsible for typhoid fever, Salmonella Typhi, is typically found in food or water contaminated by the feces of an infected person. Contaminated air is not a significant mode of transmission for typhoid fever, making choice A incorrect. While waterborne transmission can occur, it is through contaminated water rather than specifically mineral water, making choice B incorrect. Therefore, the correct answer is C, as contaminated food and water are the main sources of transmission for typhoid fever.

Correct Answer: B

Rationale: When performing a procedure on a preschooler, it is most appropriate to do so in the treatment room. This setting is specifically designed to provide a suitable environment with necessary equipment and resources to ensure the procedure is carried out safely and efficiently. It helps minimize distractions and provides a controlled environment for healthcare providers to focus on the child's needs. Choices A, C, and D are incorrect because performing the procedure in the child's hospital bed may lack the necessary resources and equipment, allowing the child to decide when the procedure will be performed may not be feasible due to medical necessity and urgency, and asking parents to help restrain the child is not ideal as it may not provide a professional and controlled setting for the procedure.

Correct Answer: A

Rationale: To calculate the safest dose of amoxicillin for Atta, we multiply the weight (20kg) by the daily dose (50 mg/kg/day) which equals 1000 mg/day. Since the dose is to be given in two divided doses, the safest dose for each administration would be 500 mg. Therefore, the correct answer is 1000 mg, as it aligns with the prescribed dose for this child based on weight and dosing guidelines. Choice B, 750 mg, is incorrect as it does not match the calculated daily dose. Choice C, 500 mg, is incorrect as it represents the safest dose for each administration, not the total daily dose. Choice D, 250 mg, is incorrect as it is below the calculated daily dose required for the child.

Correct Answer: A

Rationale: The correct answer is A: 'The child vomits everything.' Vomiting everything is considered a danger sign in a child as it can lead to dehydration and other serious complications. Recognizing this sign early can help in timely intervention and management of the child's condition. Choices B and C are incorrect as diarrhea and headache, while concerning, are not specific danger signs highlighted in the Integrated Management of Neonatal and Childhood Illnesses.

Correct Answer: B

Rationale: In pediatric clinical assessment, a child at two years of age with fast breathing but without chest indrawing or stridor when calm is classified as having pneumonia. Fast breathing in this context is a key symptom used in the Integrated Management of Childhood Illness (IMCI) guidelines to diagnose pneumonia in children under five years old. The absence of chest indrawing or stridor when the child is calm helps differentiate this case from other respiratory conditions, making pneumonia the likely classification. Choices A, C, and D are incorrect. 'Very severe disease' is too broad and not specific to the symptoms described. 'No pneumonia' is also incorrect as the symptoms match the presentation of pneumonia. 'Local infection' is too vague and does not specifically address the respiratory symptoms observed.