Table 3.

List of pathogens isolated in the respiratory tract.

	Prevalence of Pathogens Categorized Per Study (%)
Bacterial Species	Ewig et al. [22]	Soler et al. [24]	Tan et al. * [25]	Ferrer et al. ** [26]	Nseir et al. [27]
Acetobacter europaeus			2
Acinetobacter baumannii			5	0	9
Aggregatibacter actinomycetemcomitans			3
Arabidopsis thaliana			1
Bacillus subtilis			1
Candida spp.		6
Capnocytophaga sputigena			6
Chlamydia pneumoniae	13
Chlamydia psittaci	2
Chryseobacterium meningosepticum			3
Corynebacterium spp.		3
Coxiella burnetii	2
Enterobacter cloacae	4	3		6	1
Enterococcus faecalis				8
Escherichia coli	2	0		4	1
Haemophilus influenzae	23	17	3	21	17
Klebsiella pneumoniae			8		1
Moraxella catarrhalis	9	6		4	9
Morganella morganii					0.9
Neisseria spp.		2
Peptostreptococcus			10
Porphyromonas gingivalis			7
Proteus mirabilis	2	2		4	3
Pseudomonas aeruginosa	13	14	8	16	10
Pseudomonas fluorescens	4	-
Saccharomyces cerevisiae			2
Serratia marcescens	2	2	3		2
Staphylococcus aureus			3	2	9
Methicillin resistant staphylococcus aureus (MRSA)				4	6
Staphylococcus epidermidis		13
Stenotrophomonas maltophilia	4	3			3
Streptococcus group F		2
Streptococcus mitis		2
Streptococcus oralis			14
Streptococcus pneumoniae	9	6	12	16	20
Streptococcus vividans		20
Tannerella forsythis			4
Treponema denticola			6
Total bacteria isolated in tracheal samples	53	64	289	51	304

Table 3 presents the prevalence of distinct bacterial species in the respiratory samples of patients, classified based on the corresponding studies that documented the presence of specific bacteria. * Reported in this table are only the isolated bacteria of the tracheal aspirate, percentage compared to total cultured bacteria in tracheal aspirate. ** Subgroup of mechanically ventilated patients.