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TABLE 1.

Geometric mean MICs and ranges of MICs of amphotericin B after 24, 48, and 72 h

Species No. of isolates Medium GMa (range) MIC (μg/ml)
24 h 48 h 72 h
Aspergillus
A. flavus 27 RPMI 0.9 (0.5–2) 1.17 (1–4) 1.63 (1–4)
RPMI-2 0.81 (0.25–2) 1.14 (1–4) 1.43 (1–4)
AM3 0.57 (0.5–1) 1.03 (0.5–4) 1.33 (0.5–4)
A. fumigatus 26
 General isolates 24 RPMI 0.87 (0.5–1) 1.33 (1–2) 2.18 (1–4)
RPMI-2 0.73 (0.5–1) 1.3 (1–4) 1.94 (1–4)
AM3 0.36 (0.25–1) 0.65 (0.25–1) 1.09 (0.5–2)
 Itraconazole-resistant isolates 2 RPMI 1 (1) 1.41 (1–2) 1.41 (1–2)
RPMI-2 1 (1) 1.41 (1–2) 2.83 (2–4)
AM3 0.25 (0.25) 0.71 (0.5–1) 1 (1)
A. niger 17 RPMI 0.33 (0.125–1) 0.54 (0.25–1) 0.75 (0.25–2)
RPMI-2 0.26 (0.06–0.5) 0.32 (0.125–1) 0.54 (0.25–1)
AM3 0.09 (0.03–0.25) 0.29 (0.125–0.5) 0.44 (0.125–1)
A. terreus 9 RPMI 0.63 (0.25–1) 2.33 (0.5–>4) 4.32 (1–>4)
RPMI-2 0.63 (0.25–1) 1.85 (0.5–>4) 3.17 (0.5–>4)
AM3 0.68 (0.125–1) 2.94 (0.5–>4) 4.67 (0.5–>4)
A. nidulansb 3 RPMI 1 (1) 2 (2)
RPMI-2 2 (2) 2 (2)
AM3 0.5 (0.5) 1 (1)
Fusarium
F. solani 18 RPMI 1.85 (1–4) 3.3 (1–>4) 4.39 (2–>4)
RPMI-2 1.53 (0.5–4) 2.83 (1–>4) 3.17 (1–>4)
AM3 2 (0.5–>4) 2.83 (1–>4) 3.56 (1–>4)
F. oxysporum 4 RPMI 2.38 (2–4) 3.36 (2–4) 4 (4)
RPMI-2 2 (2) 2.83 (2–4) 4 (4)
AM3 2 (1–2) 5.66 (4–>4) 6.73 (4–>4)
a

GM, Geometric mean. 

b

No growth at 24 h.