The first signs of viral (aseptic) meningitis caused by enteroviruses are usually manifested by acute fever (above + 38.5 ° C), headache, photophobia, neck stiffness (stiff neck), nausea and vomiting. 
Symptoms also include signs of meningeal irritation: involuntary contraction of the hamstring tendon during knee extension in a supine patient (Kernig's sign); involuntary bending of the legs and pulling them to the stomach when trying to tilt the patient's head forward (Brudzinsky's sign). 
With this infection of the lining of the brain in infants, increased irritability and moodiness, a complete lack of appetite and refusal of breast, increased drowsiness, and vomiting are noted. Although enteroviral meningitis in young children can occur without pronounced meningeal signs.
The younger the child, the faster damage to the meninges can occur and a response inflammatory process can develop - fulminant enteroviral meningitis with the same manifestations or only with weakness and headache. In rare cases, clouding of consciousness and stupor are possible. 
Newborns with enteroviral meningitis may present in the same way as bacterial sepsis and may also have systemic lesions such as liver necrosis, myocarditis, necrotizing enterocolitis, seizures, or focal neurologic symptoms.
Also read - Symptoms of Coxsackie and ECHO infections