We have therefore updated the 2006 diagnostic protocol, using the

We have therefore updated the 2006 diagnostic protocol, using the IUIS 2009 paper

and its references as the basis for clinical disease entities of PIDs. Additionally, a PubMed search was performed from 2007 onwards; several papers discussing the recognition of potential PID in everyday practice were found [3–13], and all were based mainly on expert opinion. All ESID members received an invitation to participate check details in this effort. [Searchstrategy, papers selected for algorithms designed for identification of potential PID patients in everyday clinical practice published in English in international papers: 1. ‘Related citations’ for the original paper [1] (three relevant hits, references [3–5]); ‘Immunologic Deficiency Syndromes/*classification[MeSH] NOT HIV NOT AIDS NOT HTLV NOT Simian’ (no additional relevant hits); ‘Immunologic Deficiency Syndromes/*diagnosis[MeSH] NOT HIV NOT AIDS NOT HTLV NOT Simian’ (eight additional

relevant hits, including the original ESID paper, references [1,4,6–11]); two additional papers suggested by contributors (references [12,13]).] While the general outline of the diagnostic protocol has remained the same, novel PIDs have been incorporated. Gemcitabine supplier The body of knowledge concerning PIDs has expanded considerably; therefore, possible diagnoses are now presented separately from the clinical protocols. Because evidence supporting diagnostic decisions is still limited, the protocols Dapagliflozin are based largely on consensus of expert opinions. Considering the possibility of a PID is the key to the diagnosis. Unfortunately,

the awareness of PIDs among professionals is low, as PIDs are considered rare and complex diseases. However, the incidence of PIDs ranges – depending on the disease – from 1:500 for often asymptomatic immunoglobulin (Ig)A deficiency to 1:500 000 [14,15]; all PIDs taken together may be as frequent as 1:2000 [16]. Like any other diagnostic process, symptoms from the history (Table 1a), signs on physical examination (Table 1b) and baseline blood tests (Table 1c) should alert any physician to the possibility of PID in children and adults, even though they are unfamiliar with the precise possible diagnosis. This is important, as successful treatment of a child with severe PID such as severe combined immunodeficiency (SCID) is dependent upon rapid recognition [17]. Non-immunologists such as general paediatricians play a vital role. Leucocyte differential and immunoglobulin isotype levels enable detection in most cases; these can be performed in many hospitals. Less urgent, but still important if future organ damage and decreased quality of life and life-span are to be prevented, is the timely recognition of late-onset as well as less pronounced forms of PID in older children and adults [18].

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