Nokea
What is a key distinguishing feature of bronchiolitis in infants?
- A. Dry cough
- B. Wheezing
- C. Stridor
- D. Productive cough
Correct Answer: B
Rationale: The correct answer is B: Wheezing. Wheezing is a key distinguishing feature of bronchiolitis in infants, typically caused by respiratory syncytial virus (RSV) infection. Bronchiolitis is characterized by inflammation and mucus buildup in the small airways of the lungs, leading to wheezing sounds during breathing. Choices A, C, and D are incorrect because dry cough, stridor, and productive cough are not typical features of bronchiolitis in infants.
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Which vaccine is contraindicated in a child with a history of severe egg allergy?
- A. MMR
- B. Varicella
- C. Influenza
- D. Hepatitis B
Correct Answer: C
Rationale: The correct answer is C: Influenza. The influenza vaccine is produced using egg-based technology, so individuals with a severe egg allergy are at risk of an allergic reaction if vaccinated with the influenza vaccine. This is due to the potential presence of egg proteins in the vaccine. Choices A, B, and D are not contraindicated in children with severe egg allergy. The MMR and Varicella vaccines do not pose a risk for children with egg allergies, and the Hepatitis B vaccine is also safe for these individuals.
One of the major differences in clinical presentation between Crohn disease (CD) and ulcerative colitis (UC) is that UC is more likely to cause which clinical manifestation?
- A. Pain
- B. Rectal bleeding
- C. Perianal lesions
- D. Growth retardation
Correct Answer: B
Rationale: Rectal bleeding is more commonly associated with ulcerative colitis (UC) than with Crohn disease (CD). While both conditions can cause abdominal pain and growth issues, bleeding is a hallmark of UC due to its superficial mucosal inflammation. Perianal lesions are more characteristic of CD, and growth retardation is typically not a direct clinical manifestation of either CD or UC.
Which of the following is a key feature of autism spectrum disorder?
- A. Delayed speech development
- B. Hyperactivity
- C. Lack of interest in toys
- D. Aggressive behavior
Correct Answer: A
Rationale: Delayed speech development is a significant feature of autism spectrum disorder. Many children with autism exhibit delays in speech and language development, which can be one of the early signs of the condition. Hyperactivity, lack of interest in toys, and aggressive behavior are not key defining features of autism spectrum disorder. While some individuals with autism may exhibit these behaviors, they are not universally characteristic of the disorder.
Which immunization is typically administered at birth?
- A. Hepatitis B
- B. DTaP
- C. MMR
- D. Varicella
Correct Answer: A
Rationale: The correct answer is A, Hepatitis B. The Hepatitis B vaccine is usually given at birth to protect against hepatitis B, a virus that can lead to chronic liver disease and liver cancer. This vaccination is crucial for newborns, especially those born to mothers who are carriers of hepatitis B. Choices B, C, and D are incorrect because DTaP (B), MMR (C), and Varicella (D) vaccines are not typically administered at birth. DTaP is given in a series starting at 2 months, MMR is usually given around 12-15 months, and Varicella is given between 12-15 months of age.
Which immunization is recommended for all newborns?
- A. Hepatitis A vaccine
- B. Hepatitis B vaccine
- C. Hepatitis C vaccine
- D. Hepatitis A, B, and C vaccines
Correct Answer: B
Rationale: The correct answer is B, the Hepatitis B vaccine. This vaccine is recommended for all newborns to prevent Hepatitis B infection, which can lead to chronic liver disease and liver cancer. The Hepatitis B vaccine is a crucial part of the routine immunization schedule for infants. Choices A, C, and D are incorrect because the recommended vaccine for newborns is specifically Hepatitis B, not Hepatitis A, Hepatitis C, or a combination of Hepatitis A, B, and C vaccines.