All'interno delle catacombe di San Callisto, a Roma, sulle pareti tufacee del "cubicolo Oceano", sono state individuate due nuove specie di batteri appartenenti al genere Kribbella che, in onore del luogo della scoperta, sono state chiamate Kribbella catacumbae e Kribbella sancticallisti. Clara Urzì, autrice della scoperta e docente di Microbiologia in the Department of Life Sciences, University of Messina, recently published in the journal "International Journal of Systematic and Evolutionary Microbiology" the details of his research carried out under the project "Cats" (Cyanobacteria Attack Rocks). These bacteria, which have favorable climatic conditions found in the catacombs with photosynthetic organisms (cyanobacteria and algae), are particularly harmful because they penetrate into the substrate tuff and disrupt the superficial part of frescoes and wall decorations. According to Patrick Albert, Professor of Botany at the University of Rome Tor Vergata, to preserve the frescoes and decrease cyanobacteria blue-green patina that create alle pareti, sarebbe necessario utilizzare un'illuminazione monocromatica, simile a quella proiettata nei nightclub.
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