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Infectiologic differential diagnosis of chronic Lyme disease and so ...

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- Ehrlichia chaffeensis [1]<br />

- Anaplasma phagocytophilum [2]<br />

E. chaffeensis infects monocytes; A. Phagocytophila, granulocytes.<br />

E. chaffeensis is the pathogen <strong>of</strong> human monocytic ehrlichiosis (HME), a very rare<br />

infectious <strong>disease</strong>, which occurs primarily in the USA <strong>and</strong> <strong>so</strong>me regions <strong>of</strong> South<br />

America, but practically nowhere else on earth.<br />

E. phagocytophila is the pathogen <strong>of</strong> human granulocytic anaplasmosis, another<br />

extremely rare <strong>disease</strong> in the USA with an annual incidence <strong>of</strong> approximately 10 / 1<br />

million in habitants [3].<br />

The infection data <strong>and</strong> symptomatology are compiled in Table 22.<br />

Table 22<br />

Human granulocytic anaplasmosis (HGA)<br />

Infection data, symptomatology, treatment<br />

Pathogen:<br />

- E. chaffeensis <strong>and</strong> Anaplasma phagocytophilum<br />

Transmission:<br />

- Ticks (I. ricinus (Europe), I. scapularis (USA))<br />

Reservoirs:<br />

- Red deer, human beings (E. chaffeensis). White-footed mice (Anaplasma<br />

phagocytophilum)<br />

Intracellular localization<br />

Symptomatology:<br />

- Fever<br />

- Influenza-like symptoms<br />

- Headaches<br />

- Joint pains<br />

- Muscle pains<br />

- Coughing<br />

- CNS di<strong>so</strong>rders<br />

- Meningitis<br />

Pathological laboratory findings:<br />

38

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