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Table 1 Acute Respiratory Infection (ARI) case definition and classification

From: Epidemiology of acute respiratory infections in children - preliminary results of a cohort in a rural north Indian community

Age group Condition items Category Nurse grading of ARI
<2 months Any one of following danger signs: Convulsions; Fast breathing (60 breaths/ min); Severe chest in drawing; Nasal flaring; Grunting; Bulging fontanel; 10 or more skin pustules or a big boil; If axillary temperature 37.5 °C or above (or feels hot to touch) or temperature less than 35.5 C (or feels cold to touch); Lethargic or unconscious; Less than normal movements Possible serious bacterial infection Acute Lower Respiratory Infection
None of the above mentioned signs or symptoms and presence of respiratory symptoms (except sore throat) Non-serious bacterial infection Acute Upper Respiratory Infection
  Presence of any one of the following general danger signs: convulsions; Inability to drink or feed or breastfeed; Lethargy or unconsciousness; Vomits everything; and/or any one of the following: Severe pneumonia or very severe disease Acute Lower Respiratory Infection
 Chest in-drawing
 Stridor in calm child
2 months Fast breathing (with age-specific cut-off rates) Pneumonia Acute Lower Respiratory Infection
10 years  2 months - 12 months: 50 breaths/min
 12 months - 5 years: 40 breaths/min
 5–10 years: 30 breaths/min
No signs of pneumonia or very severe disease but presence of any of the symptoms of ARI No pneumonia -cough or cold Acute Upper Respiratory Infection
  1. ARI was defined as occurrence of a new onset or worsening of one or more of the following five symptoms: cough, sore throat, nasal congestion, earache or discharge, breathing difficulty