Enteric Redmouth Bacterium of salmonids : a biochemical and serological comparison of selected isolates
A comparison of the agglutinating and precipatiating antigens of Enteric Redmouth Bacterium (ERMB) was made. There are two major and one minor agglutinating antigens which describe two serotypes (I and II). Only serotype I metabolizes sorbitol. A bacterin from serotype I cross protected against a ch...
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| Language: | en_US |
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2012
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| Online Access: | http://hdl.handle.net/1957/27975 |
| Summary: | A comparison of the agglutinating and precipatiating
antigens of Enteric Redmouth Bacterium (ERMB) was made.
There are two major and one minor agglutinating antigens
which describe two serotypes (I and II). Only serotype I
metabolizes sorbitol. A bacterin from serotype I cross
protected against a challenge of bacteria of serotype II
in rainbow trout (Salmo gairdneri), but serotype II could
not cross protect from a challenge of serotype I. Two
patterns of positive agglutination were observed in a
slide agglutination test depending upon the antigenic
composition of the bacterium and agglutinating antisera.
Incubation temperature altered the motility of ERMB.
At 9 C nonfunctional peritrichous flagella were produced.
At 18 and 27 C the bacterium was motile. No motility was
observed at 37 C due to a complete loss of flagella.
The percent quanine plus cytosine for ERMB was found
to be 47.95 ± 0.45 (95 percent confidence interval). This
work supports the proposal of Yersinia ruckeri as the genus
and species designation for ERMB. === Graduation date: 1977 |
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