1. This patient had an episode of acute bacterial sinusitis 2 weeks ago and now presents with headache. What is the most likely diagnosis?

2. What sign is demonstrated in this image?

3. A young man presents with a skin rash involving the palms of his hands a month after having unprotected sex with a prostitute. What is the treatment for this condition?

4. If untreated, this patient may develop which of the following complications in the future?

5. Which of the following signs could be present in the neurological form of this disease?

6. A young man presents with fever, a decrescendo diastolic murmur over Erb’s point, and the pictured skin findings. Which of the following manifestations is less likely to occur in this case?

7. A young man presents with fever and the pictured skin findings. Which of the following manifestations is least likely to develop in the acute form of this disease?

8. This patient presented with blanching erythema and warmth of the buttocks, as shown in the image. Which of the following is the most likely diagnosis?

9. Which of the following organisms is a likely causative agent of the findings in this image?

10. This is a young man with human immunodeficiency virus. Which of the following organisms is a likely causative agent of the skin findings in this image?

11. This is a young woman who presented with dysuria, vaginal discharge, and a petechial/purpuric rash involving the distal lower extremities, shown in the image. Which of the following infectious organisms is most likely responsible?

12. Which of the following organisms is a likely causative agent of the findings in this image?

13. What is the most likely diagnosis?

14. What additional finding might you expect this patient to have?