Maintain high incidence of suspicion for Rickettsial infections when patients present with "influenza-like" symptoms during summer months regardless of a known history of tick exposure (2)[...
Untreated rickettsial infections have a high rate of morbidity and mortality (20-30% wi...
Patients with mild disease may be treated as outpatients if close follow-up is available.
Hospitalize patients with moderate to severe disease.
Infection does not c...
186772009 Rocky Mountain spotted fever (disorder)
240616003 Eastern Rocky Mountain spotted fever
240615004 Western Rocky Mountain spotte...
Diagnosis of RMSF requires a high index of clinical suspicion.
Tick bites are often unnoticed, and some patients may never develop a rash.
Begin treatment immediately without waiting for...
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<bold>FIGURE 25-3</bold> <bold>Deer ticks at the larval, nymphal, and adult stages.</bold> Larval, nymphal, and adult ticks are approximately 0.5, 1, and 3 mm long (excluding legs), respectively. A sewing needle in the upper-left corner of the picture provides scale. (Photo provided by the American Lyme Disease Foundation.)
<bold>FIGURE 25-3</bold> <bold>Deer ticks at the larval, nymphal, and adult stages.</bold> Larval, nymphal, and ad...
FIG. 6.12. Tick bite. Typical appearance of an engorged tick.
<bold>FIGURE 28-1</bold> <bold>Electron micrograph of a thin section of a human endothelial cell infected with <i>Rickettsia rickettsii</i>, the etiological agent of Rocky Mountain spotted fever.</bold> The rickettsiae are the dark, rod-shaped bacteria in the nucleus, about the same size as the mitochondria and smaller than most other bacteria. These rickettsiae have invaded the nucleus. Although <i>R. rickettsii</i> organisms usually occupy the cytopla...
<bold>FIGURE 28-1</bold> <bold>Electron micrograph of a thin section of a human endothelial cell infected with <i...
<bold>FIGURE 28-4</bold> <bold>Cross-section of a blood vessel from the dermis of a patient with Rocky Mountain spotted fever.</bold> The rickettsiae are visualized within endothelial cells and vascular smooth muscle cells as tiny purple–red dots in clusters. Notice the infiltration of the vessel with lymphocytes and histiocytes.
<bold>FIGURE 28-4</bold> <bold>Cross-section of a blood vessel from the dermis of a patient with Rocky Mountain spotted...
FIG. 11.72. Rocky Mountain spotted fever. This boy, recently returned from a camping trip during which he sustained numerous tick bites, presented with fever, headache, and rash. He has the typical exanthem of Rocky Mountain spotted fever, which begins on the ankles and wrists, spreads to the palms and soles, and evolves from maculopapular to petechial.
FIG. 11.72. Rocky Mountain spotted fever. This boy, recently returned from a camping trip during which he sustained numerous tick bites, p...
Figure 289.3. Adult female (<italic>right</bold>) and male (<italic>left</bold>) deer ticks. Note the long mouthparts of the female and her light coloring posteriorly. Males rarely attach to human hosts, and then only lightly.
Figure 289.3. Adult female (<italic>right</bold>) and male (<italic>left</bold>) deer ticks. Note the long mouthpa...
<bold>Figure 67-6</bold> Rocky Mountain spotted fever (RMSF). Note the multiple petechial lesions on the forearm. (Courtesy of Steven Manders, MD.)
<bold>Figure 67-6</bold> Rocky Mountain spotted fever (RMSF). Note the multiple petechial lesions on the forearm. (Courtesy of...
<bold>FIGURE 18-7.</bold> Arthropod ectoparasites and vectors of human infectious diseases. (<italic>A</bold>) <italic>Dermacentor andersoni</bold>, the wood tick; one of the tick vectors of Rocky Mountain spotted fever. (<italic>B</bold>) <italic>Xenopsylla</bold> cheopis, the oriental rat flea; the vector of plague and endemic typhus. (<italic>C</bold>) <italic>Pediculus humanus</bold>, the human body louse; a vector of epidemic typhus. (<italic>D</bold>) <italic>Phthirus pubis</bold>, the pubic louse; because of its appearance, it is also known as the crab...
<bold>FIGURE 18-7.</bold> Arthropod ectoparasites and vectors of human infectious diseases. (<italic>A</bold>) ...
Rocky mountain spotted fever. A severe petechial and purpuric eruption is noted on the arm in this fatal case.
48 yo diabetic with fever and petechial eruption; likely dx after investigation was Rocky Mountain Spotted Fever (RMSF)