Table 2.

Viable microorganisms recovered from flight and control samples.

Category	Environment	Genera identified
Flight samples	10,000 ft Filter A	NA
	10,000 ft Filter B	NA
	20,000 ft Filter A	Bacillus zhangzhouensis5*,+, Bacillus pumilus1 +
	20,000 ft Filter B	NA
	30,000 ft Filter A	Bacillus zhangzhouensis2, Bacillus spp.2 ^
	30,000 ft Filter B	NA
	40,000 ft Filter A	NA
	40,000 ft Filter B	Streptococcus sp.1 ^, Streptomyces spp.2 ^
Ground control	Pre-flight plane swab	Bacillus subtilis4 +, Bacillus pumilus3 +, Bacillus megaterium3 +, Bacillus zhangzhouensis1 +, Bacillus safensis1 +, Bacillus spp.8, Bacillus licheniformis3 +, Bacillus halotolerans1 +, Lysinibacillus sinduriesis1 +, Methylorubrum zatmanii2 ^, Lysinibacillus sp1. +
	Post-flight plane swab	Bacillus spp. 2 +, Bacillus zhangzhouensis6
Cabin control	Bench swab+	Bacillus subtilis3, Bacillus safensis1, Bacillus maritimus1, Lysinibacillus sphaericus1, Lysinibacillus acetophenoni1
	Witness R2A plate	Pseudomonas syringae1+, Microvirga#,$ 1 +, Methylorubrum populi$ 1 +, Cellulomonas cellasea 1 +, Streptococcus sp 1 ^, Agromyces# sp 1^, Planomicrobium glaciei$ 1+, Staphylococcus epidermidis 2+, Bacillus licheniformis2 ^, Citrococcus sp. 1 ^, Bacillus paralicheniformis1^
Process control&	PBS elution fluid control	Bacillus zhangzhouensis 1, Bacillus sp. 1

*The number in brackets indicates number of isolates matching the genus and/or species.

^#Designates query lengths < 1,000 nt.

^$Query sequence had < 95% identity to database match.

⁺Isolates from June 20, 2018 sampling only.

^{^}Isolates from June 21, 2018 sampling only.

^&Control sample taken in lab July 2018.