<prompt> Kernigs sign is seen inPneumoniaAcute bacterial meningitisMental retardationCerebral palsy  <response>: Acute bacterial meningitis Acute bacterial meningitis is one of the most potentially serious infections occurring in infants and older children.It is commoner in neonates and infants than in older children because their immune mechanism and phagocytic functions are not fully matured.Clinical features of meningitis in childrenThe onset is acute and the symptoms are -FeverIrritabilityHeadacheProjectile vomitingShrill cry Bulging fontanelSeizuresAltered sensoriumPhotophobiaNeck rigidityGeneralized hypertoniaDiplopiaPtosisSquintSignsKernigs sign Extension of khee is restricted to less than 135, when the hip is in 90 flexed position.Brudzinski sign On flexing the Neck, there is flexion of the hips and knees.Tachy cerebrate If skin of the abdomen is lightly scratched, flushing may be seen. 