• Jasanjeet Jawanda.
• Department of Internal Medicine, University of Connecticut, 263 Farmington Ave, Farmington, CT 06030, USA. Electronic address: jawanda@uchc.edu.
• Am J Emerg Med. 2020 Jul 1; 38 (7): 1543.e1-1543.e2.

AbstractAnaplasma phagocytophilum (AP) is the causative agent of human granulocytic anaplasmosis (HGA), a tick-borne illness with highest incidence in north-eastern regions of the United States. This condition presents with vague constitutional symptoms and has been associated with laboratory derangements such as leukopenia, thrombocytopenia and transaminitis1. Rhabdomyolysis, however, is not one of these associations. We report a case of confirmed HGA associated with severe rhabdomyolysis, where no other cause was identified. The etiology of rhabdomyolysis secondary to AP infection is still unknown. A presumptive diagnosis of HGA can be made in the presence of fever, non-specific symptoms such as myalgias, laboratory derangements such as leukopenia and thrombocytopenia in an individual residing in an endemic area3. Serological confirmation should not delay treatment, given the rapid progression of this dangerous infection. Rhabdomyolysis should also be considered as part of supporting data in the diagnostic consideration for HGA.Copyright © 2020 Elsevier Inc. All rights reserved.

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