Table 2.

Presence of different bacterial DNA in the samples of cosmic dust from the surface of ISS.

Year	Location of dust sampling	Bacteria species/foreign substance
2013	Porthole frame of VL2 of the small research module 2	Delftia sp.
	Glass-frame border of the porthole frame of VL2 of the small research module 2	Delftia sp., DNA of Mycobacteria sp. (marine bacterioplankton)
2014	Cover of the porthole no. 13 of the service module	Organic matter, including peptides and flavonoids
	Porthole VL 2 of docking compartment 1	DNA of uncultivated soil bacteria from Madagascar and reservoirs
	The surface of photoelectron converters of solar panels	DNA of Archaebacteria
2015	Radiator surface of the thermoregulation system of the service module	DNA sequences close to the genomes of uncultured fungi
	Radiator surface of the thermoregulation system of the service module, between radiator tubes	DNA of Archaebacteria; DNA of fungi Aureobasidium sp.
	Brackets 2434 and 2435 of the service module	DNA sequence close to the plant genomes
	Porthole VL 1 of the docking compartment 1	DNA of Erythrobasidium sp., Cystobasidium sp., Staphylococcus saprophyticus, Agrococcus jenensis
2016	Radiator surface of the thermoregulation system (near porthole no. 8) of the service module	DNA of Mycobacteria sp. (marine bacterioplankton), fungi DNA of the genus Bjerkandera