Hemolysins


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Related to Hemolysins: Leukocidins
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Hemolysins

 

substances capable of liberating hemoglobin from red blood cells. Upon liberation by hemolysins, the hemoglobin dissolves in the plasma or surrounding fluid and the blood (or the suspension of red blood cells) becomes transparent (laked blood). Hemolysins are the products of the vital activities of many bacteria (for example, staphylococci and streptococci), parasitic worms, insects, scorpions, and some poisonous snakes (lysolecithins). Hemolysins may be present in the blood serum and lyse the body’s own red blood cells (autohemolysis). However, they generally appear after intravenous injection of red blood cells obtained from the same species of animal (isohemolysins) or from another species (heterolysins). The hemolytic properties of these serums, which depend upon the presence of complement (a thermolabile substance needed for the action of heterolysins upon red blood cells), are lost when they are heated to 56° C for 30 minutes.

KH. KH. PLANEL’ES

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
coli Salmonella spp n = 12 n = 3 Enzymes Hyaluronidase 0 0 Proteases 0 0 Lipases 0 0 DNases 0 0 Hemolysins 12 3 Coagulase 0 0 Superoxide dismutase 9 3 Fibrinolysin 0 0 Toxins and Enterotoxins 10 3 others Shiga toxin 12 0 Acid resistance pH 3.5 10 3 Biofilm formation 10 3 Lipopolysaccharide 12 1 Haemoglobin utilization 12 0 Total 87 (52%) 16 (38%) Virulence Factors Pseudomonas S.
It should be noted that hemolysin is a well-known virulence factor, and hemolytic activity has been detected in other Chromobacterium species, such as C.
This multiplex PCR included 16s rRNA gene as internal control and genes for Panton Valentine leucocidin (PVL), toxic shock syndrome toxin, and alpha and beta hemolysins.
(56.) Vesper S, Vesper M (2004) Possible role of fungal hemolysins in sick building syndrome.
Patients with paroxysmal cold hemoglobinuria have a biphasic hemolysin referred to as the Donath-Landsteiner antibody, which most often has anti-P specificity.
glabrata strains (98.9%), being one strain (1.1%) considered excellent producer of hemolysins (Pz mean = 0.385 [+ or -] 0.000), 82 strains (90.1%) classified as good producers (Pz ranging from 0.409 to 0.688), and seven strains (7.7%) were considered weak producers (Pz ranging from 0.722 to 0.795).
To test for virulence factors, assays for adherence, plasma coagulase, phospholipase, lipase, protease, hemolysin, and biofilm formation were carried out.
carterae Hulburt Produces hemolysins and ichthyotoxins * Bysmatrum caponii (Horiguchi et Not toxic Pienaar) Faust et Steidinger Cabra cf.
Even though a detailed understanding of its pathogenic attack on shrimp remains elusive, its extracellular products, including proteases, phospholipases, and hemolysins, are believed to be the dominant virulent factors (Austin and Zhang, 2006).
Coloe, "Characterization of Campylobacter concisus hemolysins," FEMS Immunology and Medical Microbiology, vol.