To say it clearly and support your view: Never =96 NEVER use antibiotics
in aquaria. The only thing is that you create resistant stocks and that
fish tb may become a real serious thread.=20
=20
Regards Harro
=20
=20
-----Urspr=FCngliche Nachricht-----
Von: r_m_l at yahoogroups.com [r_m_l at yahoogroups.com] Im Auftrag von
blueredorganic
Gesendet: Dienstag, 14. Juni 2005 17:30
An: r_m_l at yahoogroups.com
Betreff: [RML] Mycobacteriosis/stress/antibiotics
=20
Dear Tom,
Sorry, I wish a 10 day treatment with antibiotics would rid=20
Rainbowfish of Mycobacteria marinum. If so, believe me, we would=20
have heard about it by now! I was only speculating that it might=20
reduce the total number of Mycobacteria in the tank, the ones that=20
could re-infect the fish. Its might control total numbers of=20
pathogen; it won't eradicate them.
I wouldn't put much stock in any antibiotics. Antibiotics won't kill=20
the bacteria that's already holed up in the fish's organs and=20
tissues. Mycobacteria marinum (like the Mycobacteria that cause lung=20
tuberculosis) hide from the immune system within the macrophages=20
themselves, plus they have a waxy coating that makes them very=20
resistant to all chemical treatments. That's why hobbyists that get=20
the M. marinum disease (still a relatively rare occurence) have to be=20
treated with powerful antibiotic combinations for many months.
One correction to yesterday's letter. The scientific reference for=20
M. marinum disease spreading from aquaculture fish to wild fish in=20
Red Sea was: Diamant A et al. 2000. Mycobacteriosis in wild=20
rabbitfish Siganus rivulatus associated with cage farmng in the Gulf=20
of Eilat, Red Sea. Diseases Aquatic Organ 39: 211-219.=20
Stress (from whatever factor) always increases the likelihood of=20
disease. The factors influenceing Mycobacteriosis (infections from=20
M. marinum) in Rainbowfish are:
1. Introduction of a virulent pathogen (e.g., M. marinum) into the=20
tank
2. Numbers of the pathogen
3. Stressed fish
4. Strength of the fish's immunune system
Rainbowfish (unlike guppies) haven't been in the hobby long enough to=20
develop (genitically speaking) much immunity to a powerful pathogen=20
like M. marinumn.=20
I started keeping Rainbowfish in 1987. Those first fish (in heavily=20
planted tank) went through two years with no filtration. They did=20
fine through hot summers and many months without water changes and 90=20
ppm nitrate levels (Hey, it was a dry summer and my well kept going=20
dry). The fish thrived and there were no deaths (except a couple=20
jumping out of tank).
It is only now since the apparent introduction of a virulent pathogen=20
(most likely M. marinum in April 2004) that all my lovely fish are=20
on "life support".
I hope that my sad experience will warn others to be very careful in=20
purchasing Rainbowfish.=20
Unless you're buying from a seller that can guarantee the fish don't=20
carry M. marinum, my advice would be to buy eggs.=20=20
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Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
To say it clearly a= nd support your view: Never – NEVER use antibiotics in aquaria. The only thing is that you create resistant stocks and that fish tb may become a rea= l serious thread.
Regards Harro
-----Urspr=FCngliche Nachrich=
t-----
Von: r_m_l at yahoogroups.com
Im Auftr=
ag von
blueredorganic
Gesendet: Dienstag, 14. Juni=
2005
17:30
An: r_m_l at yahoogroups.com
Dear Tom,
Sorry, I wish a 10 day treatment with antibi=
otics
would rid
Rainbowfish of Mycobacteria marinum. I=
f so,
believe me, we would
have heard about it by now! I was only
speculating that it might
reduce the total number of Mycobacteria in t=
he
tank, the ones that
could re-infect the fish. Its might co=
ntrol
total numbers of
pathogen; it won't eradicate them.
I wouldn't put much stock in any
antibiotics. Antibiotics won't kill
the bacteria that's already holed up in the =
fish's
organs and
tissues. Mycobacteria marinum (like th=
e
Mycobacteria that cause lung
tuberculosis) hide from the immune system wi=
thin
the macrophages
themselves, plus they have a waxy coating th=
at
makes them very
resistant to all chemical treatments. =
That's
why hobbyists that get
the M. marinum disease (still a relatively r=
are
occurence) have to be
treated with powerful antibiotic combination=
s for
many months.
One correction to yesterday's letter. =
The
scientific reference for
M. marinum disease spreading from aquacultur=
e fish
to wild fish in
Red Sea was: Diamant A et al.
2000. Mycobacteriosis in wild
rabbitfish Siganus rivulatus associated with=
cage
farmng in the Gulf
of Eilat, Red Sea. Diseases Aquatic Or=
gan
39: 211-219.
Stress (from whatever factor) always increas=
es the
likelihood of
disease. The factors influenceing
Mycobacteriosis (infections from
M. marinum) in Rainbowfish are:<=
br>
1. Introduction of a virulent pathogen
(e.g., M. marinum) into the
tank
2. Numbers of the pathogen=
3. Stressed fish
4. Strength of the fish's immunune sys=
tem
Rainbowfish (unlike guppies) haven't been in=
the
hobby long enough to
develop (genitically speaking) much immunity=
to a
powerful pathogen
like M. marinumn.
I started keeping Rainbowfish in 1987. =
Those
first fish (in heavily
planted tank) went through two years with no
filtration. They did
fine through hot summers and many months wit=
hout
water changes and 90
ppm nitrate levels (Hey, it was a dry summer=
and
my well kept going
dry). The fish thrived and there were =
no
deaths (except a couple
jumping out of tank).
It is only now since the apparent introducti=
on of
a virulent pathogen
(most likely M. marinum in April 2004) that =
all my
lovely fish are
on "life support".
I hope that my sad experience will warn othe=
rs to
be very careful in
purchasing Rainbowfish.
Unless you're buying from a seller that can
guarantee the fish don't
carry M. marinum, my advice would be to buy
eggs.
------=_NextPart_000_0092_01C57108.18D1B200--