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Immunopharmacology and Immunotoxicology Volume 24, 2002 - Issue 4
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Research Article

FISH IMMUNOLOGY. I. BINDING AND ENGULFMENT OF CANDIDA ALBICANS BY ERYTHROCYTES OF RAINBOW TROUT (SALMO GAIRDNERI RICHARDSON)

L. Passantino Department of Animal Health and Welfare, University of Bari, Italy
,
M. Altamura Department of Internal Medicine, Immunology and Infectious Disease, Section of Microbiology and Immunology, University of Bari, Italy
,
A. Cianciotta
,
R. Patruno Department of Animal Health and Welfare, University of Bari, Italy
,
A. Tafaro
,
E. Jirillo Department of Internal Medicine, Immunology and Infectious Disease, Section of Microbiology and Immunology, University of Bari, Italy
&
G. F. Passantino Department of Animal Health and Welfare, University of Bari, Italy
 show all
Pages 665-678 | Published online: 12 Feb 2002
 
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ABSTRACT

The role of fish erythrocytes (FE) as phagocytic cells has poorly been investigated, until now. Here, we have focussed our attention on the interplay between rainbow trout (Salmo gairdneri Richardson) erythrocytes and Candida albicans (CA). At the same time, the intervention of autologous head kidney macrophages (MØ) in the CA processing by FE has been studied. Data show that CA particles bind to FE, which, in turn, are able to engulf but not kill them. In the presence of MØ, a decrease of FE with bound CA occurs and, in some microscopic images, FE form rosettes with MØ. Phagocytosis of CA is higher in rosetting MØ than in non-rosetting ones. According to our findings, it appears that FE represent a reservoir of engulfed CA and rosetting is an efficacious phenomenon of presentation of pathogens to MØ, where an effective clearance of them can take place.

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