1. Laboratory of Bacteriology and Medical Mycology, Istituto Superiore di Sanita, Rome
2. Department of Biology, Laboratory of Molecular Pathology and Immunochemistry, “Tor Vergata” University, Rome
3. I.R.C.C.S. Santa Lucia, Rome
4. Laboratory of Veterinary Medicine, Istituto Superiore di Sanita, Rome, Italy