Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

We describe the clinical characteristics and epidemiology of methicillin-resistant Staphylococcus aureus (MRSA) in children with cystic fibrosis (CF) from the U.S. CF center with the highest MRSA prevalence. Medical records of children with CF were retrospectively reviewed from 1997-2009. MRSA clinical isolates from 2007-2009 were analyzed by polymerase chain reaction and pulsed field gel electrophoresis. The prevalence of MRSA was 1% in 1997 and 49% in 2009. Fifty-five children (26%) had persistent MRSA infection. Sixty-eight percent of MRSA isolates were hospital-associated (HA) MRSA, of which 52% were pulsed-field type USA 100. Ninety-three percent of HA MRSA isolates were clindamycin resistant. Twelve children acquired MRSA before 1 year of age, 83% of whom were hospitalized prior to acquisition of MRSA. Ten of 11 sibling pairs carried indistinguishable MRSA strains. Children with persistent MRSA were hospitalized more often (P=.01), required inhaled medications more frequently (P=.01), and had higher rates of Pseudomonas aeruginosa coinfection (P<.001). MRSA prevalence in children with CF is increasing, and most children are infected with HA MRSA. Exposure to health care facilities and gastrointestinal surgeries may facilitate early acquisition of MRSA. Siblings carry indistinguishable MRSA strains, indicating household transmission of MRSA. Children with persistent MRSA had worse pulmonary morbidity. Coinfection with MRSA and P aeruginosa is likely associated with further increased pulmonary morbidity.
What is MRSA?

When the order was restored, Murad Pasha marched against Abbas I who was in Tabriz in 1610. Although the two armies met in Accay, north of Tabriz, no engagement or action took place. Due to the problems in the logistics, supply chain and the approaching winter Murad Pasha withdrew his forces to Diyarbakr. While being engaged in diplomatic correspondence with Abbas I for peace and preparing his army for another campaign at the same time he died on 5 August 1611 when he was older than 90. Nasuh Pasha was appointed as the new grand vizier and the commander of the eastern armies. He sued for peace, too, and accepted the proposal of the Safevid side in 1611. The Treaty of Nasuh Pasha was signed on 20 November 1612. The agreement secured the 1555 borders envisaged by the Peace of Amasya. Shah Abbas however, committed himself to send 200 bales of raw silk annually.
Which happened first, Murad marching against Abbas or the signing of the Treaty of Nasuh Pasha?

Type I interferons play an outstanding role in innate and adaptive immunity by enhancing functions of dendritic cells, inducing differentiation of monocytes, promoting immunoglobulin class switching in B cells and stimulating effector functions of T cells. The increased production of IFN/ by plasmacytoid dendritic cells could be responsible for not only efficient antiviral defence, but it also may be a pathological factor in the development of various autoimmune disorders. The first evidence of a genetic link between type I interferons and autoimmune diseases was the observation that elevated IFN activity is frequently detected in the sera of patients with systemic lupus erythematosus, and that this trait shows high heritability and familial aggregation in their first-degree healthy relatives. To date, a number of genes involved in interferon signalling have been associated with various autoimmune diseases. Patients with systemic lupus erythematosus, Sjogren's syndrome, dermatomyositis, psoriasis, and a fraction of patients with rheumatoid arthritis display a specific expression pattern of interferon-dependent genes in their leukocytes, termed the interferon signature. Here, in an attempt to understand the role of type I interferons in the pathogenesis of autoimmunity, we review the recent advances in the genetics of autoimmune diseases focusing on the association of genes involved in type I interferon pathways.

Which is the most common gene signature in Rheumatoid Arthritis patients?