bacillus and lactobacillus
as probioticS
From: Anthony XAVIER tony2xl@yahoo.co.in
To: shrimp@yahoogroups.com
Sent: 9 October 2004
Can any species of Bacillus be used in combination
with Lactobacillus species as a feed probiotic? If so please provide some
details.
e-mail: tony2xl@yahoo.co.in
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COMMENTS 1:
In general, Bacillus are great bacteria for use as
probiotics, because:
- they produce a wide variety of degradative exoenzymes
- they can be distributed in the form of spores, which are very
robust and so are more likely to arrive in healthy condition at your
farm, and can survive processing into feed.
However, you don't want just any Bacillus strain; you want
strains that are also non-pathogenic, that will actively suppress
pathogens like Vibrio, and are adapted to marine environments, and
finally have been proven in the field to work. If you work with a
reliable supplier of probiotics, they will have taken care of this
for you.
Much of the work that these organisms do is accomplished in the
water column, where they break-down sludges and slimes that exude
toxic substances and harbour pathogens. However, they will also be
active in the animal's gut, suppressing pathogens and assisting
the digestion of feed.
As for lactobacillus, these are basically gut microbes, so should be
included in feed. The real problem is that they are rather delicate,
and so are often killed in processing.
Kevin Healey
e-mail: khealey@iahp.com.au
www.iahp.com.au
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comments 2:
The following species can be added in feed
probiotics.
Lactic acid Bacillus acidophilus
L. delbruckii
L. bulgaricus
B. subtilis
B. megaterium
Acetobacter xylinum
B. lechiniformis
S. cerevesiae
S. boulardii
G Vijayaraghavan
e-mail: vijayaraghavang@yahoo.com
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comments 3:
The strains you list can indeed be used as
probiotics, however most
of them should be applied in-feed, and as they tend to be rather
delicate, you may find that they lose activity during processing.
The Bacillus organisms are different, in that they can be supplied
as spores, which are much more robust. They will also be active in
the water column, so can be applied directly to the water as well as
in-feed. However, you should choose proven strains of Bacillus from
a reliable manufacturer.
Kevin Healey
e-mail: khealey@iahp.com.au
www.iahp.com.au
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comments 4:
You may use the bacillus group that is lactic acid
producing and spore forming bacterial
strains in to the guts as the feed probiotics.
The non-lactic acid producing bacillus sporogenes
will not be useful to use as the feed probiotics.
Eluri Apuchand
e-mail: apuchand@yahoo.com