By: Fred Froderman, DVM
Spring
has finally arrived! Chlorophyl is
coming alive causing a gentle breath of green to moisten the winter worn grass
as it strains to reach the heat of the ever elusive sun. Along with the struggling grass we see the delicate shoots of the spring lilies pushing their way through the rotting mulch. Lilies rise from the
dead around Easter and have come to represent this Christian holiday. These are the lilies we will focus on here.
Lilies
are commonly found in flower arrangements, potted plants and corsages as well
as being one of the first flowers to bloom in the spring landscape of many
homes. Their beauty, however, hides a deadly truth for our feline friends. The first report of Lily toxicity
was reported in 1992 and involved an Easter lily. It is now accepted that all lilies are to be considered
nephrotoxic (toxic to the kidneys) of cats.
There is no evidence that lilies are toxic in any other species but can
cause vomiting in dogs. Almost all
reported cases of lily toxicity in cats have been through exposure to in home
potted plants and flower arrangements.
Both the leaves and the flowers are considered toxic. The actual mechanism of lily nephrotoxicity
is not known at this time and there is no definitive confirmatory test for
suspected exposure. A very small amount
can cause clinical signs of toxicity.
Clinical Signs: The first clinical signs show up 1 to 3 hours
following ingestion and include vomiting, salivation, anorexia, and
depression. The vomiting and salivation
can last 2 to 6 hours but the anorexia and depression can last throughout the
syndrome.
The
next sign that shows up is increased urinating. This usually starts 18 to 30
hours after ingestion. The increased
urinating eventually fades to total lack of urine production due to total
kidney shutdown which develops 24 to 48 hours post ingestion. At this time vomiting starts again along with
weakness followed by recumbency and death.
Treatment:
If you see your cat ingest any part of a lily you should contact your
veterinarian as soon as possible. Your
veterinarian will likely recommend treatment which will include inducing
vomiting and activated charcoal. The
other treatment for cats that are still producing urine is to give IV fluids
for 24 to 72 hours. Once your cat has
stopped producing urine, it's prognosis becomes grave. Dialysis would be the main form of treatment
at that time.
Differentials:
Other things that can cause similar signs are antifreeze toxicity, acute
and chronic renal failure and other toxins that affect the kidneys.
Summary: If you have lilies in
your house try to keep them out of reach of your cats. If you see your cat ingest any part of a
lily you should contact your veterinarian as soon as possible. Quick response and treatment are the key to
preventing permanent kidney damage and death.
If you ever have any reason to believe that your pet has ingested any
toxic substance you can contact ASPCA (Animal Poison Control Center) 24 hours a
day. 888 - 426-4435. There is a $65 fee to contact ASPCA but once
they have a case number they will talk to you or your veterinarian as often as
needed at no additional cost.