The patient presents to the clinic complaining of a painful sore on his penis. Upon assessment, the nurse notes an ulceration with a yellow slough wound base that is soft with an irregular border. The inguinal lymph node on the ipsilateral side of the wound is enlarged and firm. The nurse suspects which organism is the cause of the wound?

A child presents with a fever that has lasted for 4 days. Upon assessment, the nurse notes a strawberry tongue, reddened, painful skin on the palms of the hands and soles of the feet, and a diffuse, maculopapular rash. The rash do not blanch when pressure is applied. The nurse suspects which condition?

A patient recently diagnosed with amyotrophic lateral sclerosis asks the nurse how this disease occurs. While the etiology of ALS is unknown, the nurse bases the response on an understanding of epigenetic effects on which protein?