Table 1– Headspace hydrogen cyanide (HCN) concentrations for Pseudomonas aeruginosa (PA) cultures, control cultures and incubated blank plates
AgarOrganismSamples nHCN concentration ppbv
24 h48 h72 h96 h
BlPA9662 (17–188)155 (30–1327)743 (74–2670)831 (89–2948)
BlSP52 (2–2)2 (1–2)1 (1–2)2 (1–3)
BlSA51 (1–4)4 (3–6)3 (2–4)2 (2–3)
BlMC53 (2–6)3 (2–5)1 (1–3)1 (0–2)
ChHI52 (1–3)2 (2–2)6 (5–6)2 (2–3)
SabAF51(1–2)3(2–3)2(1–2)1(1–1)
BlBlank102 (1–2)2 (1–4.5)2 (2–2)2 (2–3)
ChBlank53 (3–4)2 (2–2)3 (2–3)2 (1–2)
SabBlank51(1–2)2(2–3)1(0–2)3(2–4)
  • Data are presented as median (interquartile range), unless otherwise stated. ppbv: parts per billion by volume; Bl: blood; Ch: chocolate; Sab: Sabouraud; SP: Streptococcus pneumoniae; SA: Staphylococcus aureus; MC: Moraxella catarrhalis; HI: Haemophilus influenzae; AF: Aspergillus fumigatus.