Microbiology: A Systems Approach 4th Edition by Marjorie Kelly Cowan

Exercise 21

From chapters 20 and 23, figures 20.16 and 23.13 a. Compare these two rashes. What kind of information wouldhelp you determine the diagnosis in both cases
b. Now compare both of these to the rashes summarized in Disease Table 18.7 (p. 532-533). Which of the diseases in Disease Table 18.7 most resembles the rashes in the preceding question, and how would you distinguish among it, the rash from figure 20.16, and the one from figure 23.13 a
Figure 20.16: The rash in RMSF. This case occurred in a child several days after the onset of fever. Also pictured is an example of the hard ticks that transmit the infection.

Figure 23.13 a : Symptom of secondary syphilis. The skin rash in secondary syphilis can form on the trunk, arms, and even palms and soles (these latter locations are particularly diagnostic). The rash does not hurt or itch and can persist for months.

Disease Table 18.7: Maculopapular Rash Diseases