;
小量;all patients were bitten by chigger and had symptoms of fever, chest distress, dyspneic respiration, cough;
均有恙螨叮咬史；均有发热、胸闷、呼吸困难、咳嗽症状；
all patients were bitten by chigger and had symptoms of fever, chest distress, dyspneic respiration, cough;
均有恙螨叮咬史；均有发热、胸闷、呼吸困难、咳嗽症状；
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