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Many viral infections predispose to bacterial superinfection, and it has been suggested that the increased susceptibility to bacterial infections is at least in part due to the effect of virus on the phagocytic cell function. Since the mechanisms by which the viruses affect neutrophil function are not well understood, we studied the function of polymorphonuclear leukocytes (PMNs) after incubation with influenza virus. Phagocytosis was assayed by incubating influenza virus (strain type A-Texas-77 [H2N2] ) treated leukocytes with 3H-thymidine-labelled staphylococci. The oxidative metabolism of the PMNs was studied by measuring the chemiluminescence generated by virus-treated PMNs after incubation with zymosan. Chemotaxis was measured under agarose. After incubation with 10(7) EID50 units of influenza virus, PMNs ingested only 35% of the bacteria, whereas control leukocytes ingested over 80%. Influenza virus also reduced the mobility of the PMNs and markedly suppressed the generation of chemiluminiscence. UV-killed virus with intact neuraminidase produced similar effects but virus with heat-inactivated neuraminidase did not. Virus envelope-neuraminidase may be responsible for some of the effects of the virus on the PMNs.
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1989,
Medical microbiology and immunology,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1974,
Immunological communications,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1956,
Annales medicinae experimentalis et biologiae Fenniae,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1994,
Avian diseases,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
November 1978,
Cancer treatment reports,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1952,
Athena; rassegna mensile di biologia, clinica e terapia,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1952,
Medycyna doswiadczalna i mikrobiologia,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1983,
Annals of the New York Academy of Sciences,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
November 1979,
Infection and immunity,
Y Debets-Ossenkopp, and
E L Mills, and
W C van Dijk, and
H A Verbrugh, and
J Verhoef
January 1990,
Intervirology,
