[…] ketone bodies in the urine with general acidosis (ketosis) in the serum.
[encognitive.com]
In the milder forms, children initially appear normal, but during infection, surgery, or other physical stress, they can develop vomiting, staggering, confusion, and coma.
[merckmanuals.com]
• Other symptoms include failure to walk or talk, seizures, tremor, microcephaly, nausea and vomiting, an eczema-like rash, • Lighter skin and hair than their family members
[slideshare.net]