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FAQs about Pet-fishing & Human Health:
Envenomation
Related Articles: Wounds Articles, Moray
Eels Bite, But Are They Venomous? by Marco Lichtenberger,
Related FAQs: Petfishing and Human
Health 1, Petfish
& Health 2, Petfishing & Human Health 3, & FAQs on: Petfishing Concerns:
Getting Poked, Spined, Stuck,
Bitten, Poisoning (ingesting),
Skin et al. Contact,
Companion Animal Involvement,
Troubleshooting/Fixing,
Bacterial Infections,
Parasitic Cross Zoonoses,
Turn About's Fair Play...
Stingrays, |
Do you have "troubles" with stings per
se? Allergen/allergic reactions? You may have more trouble than others.
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Good Snails, Bad Snails..
I know I have had my share...
<Wow, sounds like the lyrics from "Cream" from a sixties R & B adaptation! "If it weren't for bad snails, I wouldn't have no snails at all....">
I have recently set up a 29g tank with 30lbs of Marshall Island live rock. The tank has cycled and I am slowly adding livestock. I have had a few hitchhiking
snails on the rock. I call them "checkerboard snails" due to their patterning. What are the chances of these snails growing up to be a deadly seashell?
<Not likely at all... almost zip>
Conus magnus or some such?
<Nah! Dangerous conids are sand dwellers>
The rock is from the south seas where these animals originate. From what I understand these seashells can be some of the most deadly creatures on the
planet. Should I pluck them out (with great care) or let them be?
<... the latter IMO>
I have 911 on speed dial but I really didn't think I'd need that for an aquarium. Besides my own personal safety, are these snails a danger to coral? Thanks for all
your help.
<Not likely... they're all part and parcel of what makes live rock so. Enjoy the show! Bob Fenner>
Cone Snails--Steer Clear (6/3/05
I am a chronic pain patient. I now have the cone snail venom medicine in me
called Prialt. (just approved by the FDA December 31, 2004) <I hope it is
helping you.> I am fascinated by these snails and want to get one or a very
small group. <I would only keep one of these if I had a death wish. Prialt, like
Botox, is safe because it is so dilute and weakened. Like botulinum toxin, some
cone snail toxins are among the deadliest toxins on the planet.> I have 20, 30,
50, 100 gallon tanks (although not in use because of my pain problem, 11 back
surgeries). <yikes!> Anyway, do you need a permit? <Probably not, just a death
wish.> If so, how do you obtain one? <not sure> And how would you go about
obtaining a group? I am very well read on care, feeding and safety. <If so, you
should be able to find some, but I strongly advise against it--see what Dr. Ron
Shimek says about them in "Marine Invertebrates.> Thanks, Brent Ryther, Salt
Lake City. <If you really want more info on the possibility of keeping these
extremely dangerous creatures and how to get them, you might want to speak to
Brad at The Aquarium in Sandy (fantastic new store) or Randy at Mountain Shadow
Marine in Centerville. They know a lot about marine aquariums. Steve Allen,
Taylorsville.>
Stingray sting 8/23/05
My husband and I were on vacation in Corpus Christi Texas and he got stung by
a stingray. I took him to the emergency room and they stuck his foot in hot
water, took an x-ray, and gave him some antibiotics. It is now 2 weeks later and
he is still having some pain in his foot and he is very tired, nauseated, has
diarrhea, and sweats a lot even though he is not hot. Could this be because of
the sting? Thank you, Amber <Amber, Sting Rays have one or more barbed stingers
and two ventrolateral venom containing grooves that are encased in a sheath, so
to speak. When a victim is stung, such as your hubby, the stinger apparatus
then injects a protein based toxin into the wound generally causing immediate
intense pain. The injury may occur without envenomation since many rays lose or
tear off the sheath covering the venom gland. In your hubby's case, sounds like
the gland was intact. And yes, your hubby's symptoms are included along with
others listed below.
Syncope
Nausea
Vomiting
Diarrhea
Diaphoresis
Muscle cramps
Abdominal pain
Seizures, and Hypotension
Have hubby keep taking his antibiotics as the doctor prescribed. Hope he is
feeling fine soon. James (Salty Dog)>
Delayed reactions to stingray stings
9/24/05
Saw a child who was stung in the front of the ankle by a stingray 3 weeks
ago. He soaked his foot in hot water, and it got better. About a week later,
he started to get these small dense bumps in the sting area. They continued
to increase in number. About a week ago, he was swimming in a pool and
slightly scraped his forehead and nose. Now those same bumps are developing
in these areas. They itch slightly and are not painful. A few more come out
each day. Any ideas?
<Mmm, yes... I would take this child to his pediatrician, ask for a referral to
folks who deal in such matters... There are two or more components in such
stings... some involve the immediate trauma, venom... others more latent
infection... Bob Fenner>
Watch Out! There’s a Lion fish behind you…avoiding those nasty stings
12/2/05
Hi!
<Hello.>
While my friend goes on vacation, I volunteered to take care of his marine tank.
<He must trust you a lot.>
In the tank is a Lionfish. He says that when he's cleaning he has to be really vigilant just in case it mistakes his hand for food. I'm kind of
afraid. Can I use new rubber gloves when cleaning his tank?
<Yes but I still would not attempt to touch the fish, having never been stung by one I’m not sure how protective these gloves will be, of course they are better than nothing. However be sure they are not used as far as soap or other harmful materials….they need to be as sterile as possible.>
<<Not sterile, chemically inert is the issue here. Regular
"Playtex" gloves will not offer sufficient protection from a
spine. You need heavy-duty, try chemical gloves. Marina>>
Would that protect me?
<When I clean a tank with lions I usually (carefully without touching them for your safety and theirs) herd them into the corner with some sort of utensil,
(Kent scraper in my case). Some folks use barriers such as eggcrate or acrylic to keep the animal at bay. In general the animal will be much more afraid of you than you are of it and will keep a distance itself, also just be aware of where the fish is at all times don’t get lazy or day dream. ;) >
Thanks
<Welcome, Adam J.>
Echinothrix calamaris (Hatpin Urchin) 1/19/06
Hello Bob, <James today>
I work at a small LFS and we the boss picked up 3 "zebra urchins" at our
supplier the other day. They are Echinothrix calamaris I believe. My first
question is, do these urchins have the ability to "shoot" their shorter spines
out? <<No... don't shoot out. RMF>>
I touched the longer tubular spines with my thumb while trying to move it (and
ONLY the bigger ones, I am positive) but received two of the smaller spines
buried in my thumb. Very painful. I've heard from several sources that they may
be able to do so but no definitive proof. Second question is, are they
reef-safe? They are in our fish-only tanks at the moment because we could not
find any information on whether they are or not reef-friendly. <The spines of
these urchins have hundreds of alternating light/dark bands, some being strong,
thick and hollow and others shorter and finer with all being very sharp. I'm
guessing while you were trying to move it the shorter finer ones nailed
you. The venom is very much like a bee sting so it doesn't surprise me that it
is painful. Interesting urchin as in nature they can attain lengths of up to 9"
and Banggai Cardinals often seek shelter among their spines during the day. I
did some researching and couldn't find anything as to the urchin "shooting
spines". James (Salty Dog)>
Thank you and keep up the good work! <You're welcome>
Brandon
Lionfish poison
10/30/06
Hi to all the crew!
< Greetings, Emerson with you today. >
I have a little concern about Lionfish stings. I actually tried to find
out everywhere how dangerous is their poison, but the same answer shows
up: their sting is very painful. What does that mean?
< Lions are actually toxic and not poisonous. They are eaten all over
the world. >
No, I know what it means, but how dangerous is their sting? I have a
Pterois volitans, he's still pretty small (3" or so) and I'm taking
great care to avoid his spines while cleaning the tank, but an accident
can always occur.
The problem is that the closer poisoning center around is in the
neighbor city in a children's hospital somewhere in that same city. I
don't have any allergies, but I'm really concerned about the dangers of
the sting.
< You really wont know if you are allergic to a Lionfish sting until it
happens. >
Could it be deadly?
< There have been deaths reported from Lionfish, but it is said to be
extremely rare. >
Or is it ONLY painful? Your help would be more than appreciated!
< Most stings are very painful, and treated with hot water immersion to
help with the pain. Keep the poison control # handy in case you get
stung. >
Thanks!!
< Most welcome, and have a great day. >
Ivan
Foxface Envenomation (Ouch!) - 10/25/06
Two weeks ago, I was stung by 3 of my Foxface Lo's dorsal fins on the
inside of my wrist, for two hours the pain was quite intense.
<<Indeed...yikes!>>
It was suggested that I soak the wrist in as hot a water as I could
handle for at least 1-2 hours -which I did.
<<Yes, it is believed the high temperature breaks down the proteins
comprising the venom>>
It seemed to have solved the problem the three marks almost disappeared
in a week.
<<Ah good>>
Then this week the marks began to turn red and turned into 3 small
reddish blisterish looking marks and the skin area around them is
slightly red around now as well.
<<Mmm...>>
I am not sure if this is the type of questions you can answer but here
it is. My question too you, is this - Have you heard or read of any
unusual side effects from the Foxface lo venom?
<<Have heard the wounds can be slow to heal, with secondary infection a
reality. But as with bee stings/other envenomations, some individuals
will react more severely or less severely to the toxin than the
"average" person>>
Could this just be part of the process of the venom leaving the body?
<<I think this is a "secondary infection">>
I would appreciate any input you may have.
Thank you,
Rhonda McAskill
<<Were this I, I would have these wounds checked/treated by a
doctor. Regards, Eric Russell>>
Hebrew Cone (Conus ebraeus), Poisonous? Yes! Degree of toxicity... ?
5/13/07
Hello crew,
<Hi Jana, Mich here.>
I am trying to find on the Internet how poisonous the Conus ebraeus is?
<Well it does kill it's prey, primarily eunicid and Nereid Polychaete worms, by
injecting them with conotoxin, a potent neurotoxin that disturbs the ion
channels involved in neuromuscular transmission, typically resulting in
paralysis.>
I found information on other cone shells but not on this particular one.
<Yes, I too am having difficulty finding anything specific to this particular
species. There are more than 600 members of the Conidae family and only 30
documented cases of envenomations by Conus in humans, some resulting in
death. The most toxic is reported to be Conus geographus, though C textile, and
C marmoreus are also associated with an increased of mortality. I have been
unable to find any reports describing the degree of toxicity of the conotoxin
associated with C. ebraeus, but it is certainly something to take seriously and
the effect of the conotoxin would likely vary between individuals. Also worth
noting is current research on members of this family for the treatment of pain
and conditions such as Parkinson's.>
Is it found in Australia and how poisonous is it.
<The distribution of Conus ebraeus occurs in the Indo-west Pacific and Eastern
Australia as far south as Sydney.
Many thanks, kind regards, Jana.
<You're welcome. Mich>
Stingray toxicity to humans
10/24/07
Hello
<Hi there>
I was thinking about getting a blue spotted ray and have read on your web site
if you are stung that you could have a allergic reaction. How dangerous are they
and what percent of the people getting stung have a bad reaction?
<Mmm, folks with allergens to proteinaceous stings might be in trouble... how
much, how many? I don't know. Much collateral damage is done physically with
such injuries....>
I have read about the blue ring octopus, it's nothing like that is it, or is it
more like a lionfish sting.
<More toward the Lion end of the scale>
What kind of ray would you recommend that's not to toxic, if the blue spotted
is?
<One of the non-stingray ray species... See WWM, the Net, Scott Michael's
popular cartilaginous fishes book re. Rays are not easily kept BTW... as you
will find by reading. Bob Fenner>
Thanks Todd
Rabbitfish question, handling
12/15/2007
Hello.
I've got a one-spot Foxface Rabbitfish and we've had it for some time now. It's
doing well and growing like crazy.
We bought him in town and nobody told me that the spines could be dangerous.
<Oh yes>
Needless to say, we moved him between 3 tanks now and didn't know. I held him in
my hand at one point and even helped him get his gills going in the new tank
when the smaller tank he had been raised in crashed. (We had numerous newbie
fish disasters throughout the year, but everything is a+ stable now).
I am concerned after finding out that they are venomous, quite by accident,
because nobody took the time to tell us, knowing we were newbies.
I've searched the site thoroughly and read the Rabbitfish FAQs, and I see that
it mentions that they have a painful sting and are venomous. It does not,
however, tell you how venomous they are (from what I saw, but I may have missed
it somewhere) or if they are actually fatal, such as the lionfish can be.
<Somewhat less than Pteroines... more than bees... Can be dangerous to folks who
have aversion to proteinaceous stings>
I am concerned, needless to say, because he's grown to about six inches long and
he's quite the boss of the big tank, with the exception of a few of our tangs,
who rule the roost.
Thank you
<I too have hand-handled many Siganids... one just needs to be careful to keep
their hands away from the spiny (anterior) portions of their dorsal and anal
fins... Bob Fenner>
Stingray Wound - 8/15/03
What is the recommended treatment of a wound caused by the barb of a Round
Stingray?
<To a human, fish, invertebrate, itself? I do assume you are
speaking of a human, no? Here is what the dive doctor has for ya:
Prehospital Care: As soon as possible, immerse the affected body part in very
hot water (as hot as the patient can tolerate without actually getting burned)
or apply a hot pack to the affected body part. Heat rapidly decreases the
patient's pain.
Emergency Department Care:
If a patient has demonstrated any sign of systemic effect, it should be
addressed quickly.
No specific antidote is available, and supportive care is recommended, including
use of analgesics.
An easy and important initial treatment that can be started (sometimes at the
scene of the injury) is immersion of the injured extremity in hot water
(preferably 110-115°F). The water should be as hot as the patient can tolerate
but should not cause burns. The water should be exchanged for more hot water as
it cools, for an immersion duration of 30-90 minutes.
Very little has been written about the toxin left in wounds after a stingray
injury. The authors do know that the stingray toxin is a protein and is very
sensitive to heat. The patient should obtain very rapid symptomatic improvement
with heat as the poison denatures and becomes neutralized.
In addition, some practitioners also infiltrate the wound with a local
anesthetic, such as Lidocaine (Lignocaine) or the longer-acting Bupivacaine.
Occasionally, parenteral narcotics also may be given.
After the toxin has been deactivated by the hot water, attention to local wound
care should begin because it is not uncommon for part of the stinging apparatus
to break off in the wound.
Obtain a plain radiographic image (X-ray) of the injured area to look for
retained barbs or other foreign material. Explore the wound thoroughly and
irrigate it. Perform any necessary debridement. (debris removal).
Remove any foreign body from the wounds, including the spine and sheath from the
stingray stinger, as well as dirt or sand. As with other potentially contaminated wounds, consider allowing the wound to
heal without closure. Because most of the wounds are small, this usually is not
an issue. If the wound is very large or gaping, consider loose primary closure.
Address the patient’s tetanus immunization status and administer a booster as
needed.
-Paul>
Stingray Wound to a Hooman Beene - 8/15/03
Hi, Paul! Wow, that was FAST!!!
<We aim to please, plus a
marine inflicted wound is nothing to wait about> Yas, it be to a hooman beene!
<Lucky guess. I figured fish know enough not to muck with a stingray. :-)
Diving or venturing into the frigid south coast waters?>
Excellent info, and
Thank You Very Much, R.L. "Bob" Dean
<My pleasure. Take
the wound seriously and let us know if we can be of anymore help -Paul>
- Stingray Stings -
Thanks for your concern. The incident occurred last Monday to a
friend, an adult male approx 30 in excellent physical condition. Beach
was rocky, thus not expecting stingrays. ID'd as definitely
"Round Stingray" approx 12-in dia. Wound was a
"slash", not puncture, pain and bleeding were instantaneous, bleeding
was profuse which helped flush out the wound. While water was heating over a
propane flame, wound was irrigated with fresh water and inspected for the barb
or any other foreign objects. Nothing was found. Within
approx 3-4 min.s of immersion in HOT water, pain level greatly reduced. Kept
checking patient for any signs of shock incl anaphylactic. No signs other than
somewhat elevated state of excite. Analgesic in form of Benadryl
given orally. Wound stopped bleeding after about 20 min.s (being soaked
in clean bucket), but pressure by walking reopened so applied compress gauze
over wound. Patient had somewhat painful night, Swelling
was only about size of half-dollar, no striations indicative of infection by
morning, couldn't keep him out of the water, said "Goodbye!" Reason
for my inquiry was a couple of people on site demanded he soak it in COLD water!
Took about 5 min.s to get through to them. Thanks again,
"R.L."
<Indeed, hot water is 'de riguer' for venomous stings (or wounds in this
case) as the heat breaks down the proteins of the venom. Ice and cold water can
wait till later to help reduce swelling, but to address the immediate pain of
the injury, you did the right thing. Onward and upward!
Cheers, J -- >
A Nasty Owee 12/9/2003
Good morning,
Yesterday while cleaning my tank I had a small cut on my thumb. <Did you cut
yourself before putting your thumb in the aquarium or on something inside?> I
accidentally touched the elegance coral and was stung by it. <Ouch!> My
thumb is now swollen, red and tender. <Either a toxic reaction or an
infection.> Should I go see the doctor or give it some time. <Go to the
doctor ASAP. If this redness is spreading, you may have cellulitis, a
potentially serious infection requiring antibiotics.> Also, what
is the active ingredient in the poison. <Uncertain. I could not get any
specifics on the Internet. Most of these toxins are a mix of noxious
things--local irritants, anticoagulants, neurotoxins. Most reactions are
localized burning & swelling, but can be more severe depending on type &
amount of venom. Allergic reaction can be severe. Some aquarists have had neurological
symptoms like numbness & tingling, loss of taste. Check here for more info: http://www.emedicine.com/wild/topic18.htm>
Thanks, <You're welcome. I hope this heals quickly, Steve Allen>
-Brent
<There's a lesson here for all. It is best to wear arm-length gloves when
messing around in your reef tank. Here's one source: http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=3871&D=gloves&R=7795&Ntt=gloves&Ntk=
All&Dx=mode+matchallany&Ntx=mode+matchallany&Np=1&N=2004&Nty=1 Also,
NEVER EVER put your unprotected skin into the water if you have an open wound
(scratch, laceration). The tank is a veritable cesspool of potentially
infectious agents and broken skin is an easy access point for them to infect
you. Intact skin is your primary line of defense against infection.>
Human Poisoning from Sarcophyton?
Anthony- After a somewhat panicked web search, I came across your article:
http://www.reefkeeping.com/issues/2002-06/ac/feature/
on coral propagation in Reefkeeping magazine. I say
"panicked" because while I was attempting to cut a
diseased portion of a Sarcophyton species off, I inadvertently cut my finger in
the process. The cut was shallow; so shallow that I did not realize I
cut myself until the "operation" was complete, and it did NOT draw
blood. However, I'm worried about any toxic reaction. It's been two
hours as I write this, with no sign of rash or anything at the cut site, or any
symptoms that can't be explained by panic disorder. Are there any warning
signs/window of time I should be looking out for a "bad" reaction? Is
it possible I introduced something harmful or lethal via this shallow cut?
I feel incredibly stupid for (a) doing this and (b) e-mailing someone I don't
know about it, but I'd really like the opinion of an authority on this so I can
rest easy or get myself to the hospital. Thank you very much for your time..
-Todd
<Cheers, Todd. Very glad to hear about the propagation efforts! Sorry to hear
you got a scare :p No worries though my friend. Nothing imminent is likely
regarding a poisoning or allergic reaction. What risk there is no worse than
the same risk of being bit or stung by a non-venomous fish or even simply
putting your hand in the tank on a daily basis
with a hangnail or other non-related wound. Specifically, there are nasty
microbes in all aquatic environments and specifically we fear Vibrio or
Mycobacterium.
Your first step of course was/should be to cleanse the wound thoroughly with
soapy water and then use a disinfectant (antibiotic cream, peroxide, or the like). The doctor is unlikely
to be necessary but do call at least to get his advice. Really... the concern here is more from a septic
infection from the razor than anything the coral could impart.
Sarcophytons are specifically noxious to other corals and aquatic invertebrates
with regard for allelopathic compounds. Again, since this is not an overtly poisonous (to humans) animal and
you didn't even draw blood... it seems likely that you will have a very nice holiday week. The only poisoning
that I see as being likely in your near future is alcohol poisoning tomorrow
night <G>. Happy New Year, my friend. Anthony>
- Dead Lionfish Venom -
Hello! I have read that dead puffers and other kinds of poisonous [venomous]
fish can pollute the tank with toxins from their body and wipe out the entire
system. Does this also apply to lionfish when they are dead?
<Not as far as I
know... although any fish, venomous or not will become a source of pollution if
left dead in the tank for too long.>
Andrew
<Cheers, J -- ><<A side note here re Lionfish/Scorpaenines... they
ARE still venomous to humans when dead. RMF who knows this firsthand>>
Medical Article Related to Marine Aquaria
Bob & Fellow Crewmates:
I thought you might find this article about "Poisonings, Envenomations and
Trauma From Marine Creatures" found in the most recent issue of American
Family Physician to be interesting/useful.
Steve
http://www.aafp.org/afp/20040215/885.html
Interesting Articles on aquatic animal envenomation
Bob & Anthony:
Thought you might find these articles for doctors at eMedicine.com
interesting:
Echinoderrn Envenomations: http://www.emedicine.com/emerg/topic158.htm
Coelenterate and Jellyfish Envenomations:
http://www.emedicine.com/emerg/topic104.htm
Lionfish and Stonefish: http://www.emedicine.com/emerg/topic300.htm
Octopus Envenomations: http://www.emedicine.com/emerg/topic342.htm
Stingray Envenomations: http://www.emedicine.com/emerg/topic556.htm
Decompression Sickness: http://www.emedicine.com/emerg/topic121.htm
Steve
<Thank you for this Steve. Will post on WWM. Bob F>
Toxic corals? 9/30/04
Hi please I need help, I am very confused, all corals are toxic right?
<hmmm... depends on your perspective/meaning: regarding filter feeding?
(stinging nature of Cnidarian animals)... regarding allelopathy (chemical
warfare against encroaching organisms)... poisonous nature if ingested or
harassed??
what corals are more toxic?, what corals are less toxic?,
<variable as you might guess... and as per the above definitions>
can a coral kill a human really?,
<yes... more than a few can. Notably... palytoxin in Zoanthids. A historical use
by Hawaiian natives, et al when tipping spears for mortal combat>
I wont full my aquarium with corals, but I don’t wont go to the hospital or die,
please help me, what corals you know not are dangerous?, thanks you.
<this is a small concern with good husbandry/handling... really. No worries with
careful and proper handling as you do household chemicals, medications, fumous
agents at work/home, etc. Anthony>
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