Journal
MYCOSES
Volume 46, Issue 3-4, Pages 77-83Publisher
WILEY
DOI: 10.1046/j.1439-0507.2003.00852.x
Keywords
Aspergillus; phagocytosis; oxidative burst host defense
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Human phagocytic defenses against non-fumigatus aspergilli were compared with those against Aspergillus fumigatus . Monocyte-derived macrophages exhibited lower phagocytic capacities against non-fumigatus aspergilli, particularly A. nidulans and A. niger , compared with A fumigatus (P < 0.05). Non-opsonized hyphae suppressed oxidative burst (as measured by superoxide anion production) of polymorphonuclear leukocytes (PMNs). Further, these cells responded with less vigorous oxidative burst to serum-opsonized hyphae of non-fumigatus Aspergillus species, particularly A. flavus and A. terreus , compared with A. fumigatus (P less than or equal to 0.05). Similarly, PMNs induced less hyphal damage assessed by XTT colorimetric assay to non-fumigatus species, particularly A. flavus and A. nidulans , compared with A. fumigatus (P < 0.05). Thus, non-fumigatus aspergilli are generally more resistant to mononuclear and polymorphonuclear phagocytes than A. fumigatus , a finding which should be considered during management of invasive aspergillosis caused by these species.
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