INTRODUCTION
Chikungunya virus (CHIKV) is an alphavirus endemic in Africa, Asia, and
South America and can be found in tropical areas with seasonal
characteristics, with outbreaks reported in several countries worldwide
(1,2). Chikungunya presents a broad symptom spectrum, similar to other
arboviroses, including fever, rash, myalgia, arthralgia, and headache
(3). When duration of symptoms persists beyond three months it reaches
the chronic phase, with persistence of arthritis and joint tenosynovitis
(1).
CHIKV infection can be a trigger for onset of autoimmune diseases in
genetically predisposed individuals (2). In this scenario, inflammatory
myopathy is an extremely rare presentation of CHIKV scarcely described
in the literature. This article aims to report a rare case of an
antisynthetase syndrome (ASS) post-chikungunya infection, characterized
by muscle weakness, interstitial lung disease, and positive anti-Jo-1.