CSF2 and Cryptococcal meningitis: Given that approximately 13% of cryptococcosis cases in Colombia occur in HIV negative patients without apparent risk factors [18, 19], and considering the recent identification of neutralizing auto-Abs against GM-CSF in three Colombian patients with cryptococcal meningitis [20], we tested the hypothesis that neutralizing auto-Abs against GM-CSF may underlie cryptococcosis in other seemingly healthy Colombian individuals.