Your brothers report shows he has typhoid and increased bilirubin level and
liver enzyme ALT.Jaundice accompanying typhoid is very rare,though there cases.In such instances he should be tested for hepatitis A and B ,A being more possible it's food born viral disease.
Constipation is common in typhoid
Next Steps
His high fever, vomiting with dehydration is an indication for hospital admission and further management ,to prevent complications