CRP and digestive system infectious disorder: In New Zealand, clinical guidelines produced by the National Pediatric Gastroenterology Clinical Network recommended blood (at least the following: full blood count, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) and albumin) and fecal tests to screen for the presence of systemic inflammation and exclude any gastrointestinal infections for any children suspected of having IBD (4).