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. 2015 Apr 13;10:767–774. doi: 10.2147/COPD.S76740

Table 2.

Pathogens in 72 COPD patients with acute exacerbation requiring an emergency department visit

Microorganism identified
Viruses n=17 Bacteria n=31 Others n=3
Parainfluenza virus type 3 6 Haemophilus influenzae 9 Chlamydia 2
Influenza A 3 Haemophilus parainfluenzae 7 Mycobacterium avium-intracellulare 1
Human rhinovirus 3 Klebsiella pneumoniae 4
Adenovirus 2 Pseudomonas aeruginosa 3
Coronavirus-OC43 1 Acinetobacter baumannii 2
Coronavirus-229E 1 Streptococcus pneumoniae 1
Human metapneumovirus 1 Moraxella catarrhalis 1
Staphylococcus aureus 1
Escherichia coli 1
Serratia marcescens 1
Enterobacter cloacae 1

Abbreviation: COPD, chronic obstructive pulmonary disease.