 Item number SCP-149 Object Class Keter Special Containment Procedures SCP-149 in any of its instances is to be kept inside a sealed plexiglass box for observation. Oxygen and a nutrient mist are to be released into the containment cell every two hours. If any instance of SCP-149 escapes its cell, Protocol 42 Charlie is to be brought into effect on any and all contaminated personnel by order of O5-12 after Incident 149-1. Description SCP-149 is a breed of mosquito which carries a strain of retrovirus, herein referred to as SCP-149A, that mutates regenerating human cells into fertilized mosquito eggs. SCP-149A is injected directly into the bloodstream when SCP-149 feeds. The SCP-149A quickly works on the nucleus of the cells, warping the DNA. The first set of cells bred from these changed instructions closely resemble cysts and are concentrated in the lining of the esophagus and the sinuses. One dissection however, these cysts are revealed to be filled with SCP-149's larvae, the cysts acting as a protective casing against external forces. SCP-149 appears to go through its maturation cycle in a matter of hours. By the time the subject is able to feel any effects, the first generation of SCP-149 has already grown inside the subject's body. SCP-149 primarily achieves exodus through the mouth and nostrils, occasionally being diverted through the sphenoid sinuses to escape through the eye sockets. Infection by SCP-149 is fatal and chance of infection has been estimated to be 50% from one bite. Addendum, Incident 149-1. When incidents of SCP-149 escaped and infected multiple Class D subjects, the majority of whom did not report SCP-149's contact with them. Within five hours, SCP-149 had matured in these hosts and burst out of them, infecting several staff members. It was only thanks to the quick thinking of Dr. Pratt, who sealed sub-levels 12-15 that the entire site was not infected. As a response to this, O5 Command has created Protocol 42 Charlie to be used if SCP-149 escapes confinement. Lesson complete. If you missed the previous orientation, go watch SCP-148, the Telekill Alloy, right now. Or for the complete course, watch this playlist.