Other infectious routes including intramuscular and oral inoculation also could induce lung function abnormality but with a delay onset . Immunohistochemical staining showed the numbers of catecholaminergic neurons in the midbrain were gradually declined after infection .

其他的感染途径如肌肉注射或口内食感染，同样会造成小鼠感染并出现肺功能的异常，但是发病的时间与中枢神经被波及有关。