bites, zoonotic diseases & stings
TRANSCRIPT
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Bites, Zoonotic Diseases & Stings
Gerry Wegner
Varment Guard Environmental Services, Inc.
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When Fido Isn’t So Friendly
• Beware of fenced
and gated yards.
• If disposition is
unknown, don’t
take a chance.
• Involve dog’s
owner.
• If bitten and skin broken, determine if dog has had
rabies shots. If not inoculated or unknown, dog must
be tested (fatal) and if positive, you get rabies shots!
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Rabies Inoculations
Three types of rabies inoculation or vaccine:
• One is a standard vaccine that prevents
infection if given before infection.
• Another is used to treat someone who has
already been exposed to the virus.
• The third type is used
on animals to prevent
outbreaks.
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Rabies Inoculations• The standard rabies vaccine is given to
people who are likely to come into contact
with the rabies virus (i.e., veterinarians,
wildlife workers and rabies researchers).
• If exposure is likely, it should be reinforced
with a regular booster.
• It does not make you completely safe, but
it makes an infection much more likely to
be survivable.
• Cost of inoculation: $500 - $800 each
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Rabies Inoculations
• The post-exposure
vaccine is given to
people who have been
bitten by a positively
or potentially infected
animal.
• It involves a course of injections and is
usually effective in stopping progression
of the disease.
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Human Health Concerns in
Dealing with Wildlife
Donald L. Burton
&
Gerald S. Wegner
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Human Health Concerns in
Dealing with Wildlife
• Pathogens associated
with nuisance wildlife
saliva & excreta
• Precautionary
measures
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Rabies• Pathogen: Lyssavirus spp.
• Raccoons, skunks, coyotes, ferrets,
mink, foxes, bats (4-6% of bats tested),
and occasionally groundhogs
• Mode of transmission: bite / saliva
• Early symptoms: apprehension,
intimidation, headache, mild fever,
sensory discomfort -- visual and
auditory sensitivity
• Advanced symptoms: disorientation,
agitation, hallucination, aggression,
difficulty swallowing, hypersalivation,
paralysis, respiratory failure, death
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Raccoon Roundworm
• Pathogen: Baylisascaris procyonis
• Raccoon feces may contain eggs of
this parasitic roundworm.
• Mode of transmission: exposure to
feces or contaminated soil / oral
• Moderate: fever, blood disorders, lung
conditions similar to pneumonia
• Severe: central nervous system
disease, acute sensitivity to light, loss
of vision, sometimes fatal to children
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Histoplasmosis• Pathogen: Histoplasma capsulatum
• Soil contaminated with feces of birds
(esp. pigeons & geese) and bats; also
accumulations of bird and bat feces
in roosting areas
• Mode of transmission: Inhalation of
fungal spores
• Mild: occasional dry cough
• Severe: frequent hacking cough
(tuberculosis-like); sometimes fatal
to untreated infected children
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Chlamydiosis(aka ornithosis, psittacosis, parrot fever)
• Pathogen: Chlamydiophila psittaci
• Feces of certain birds (esp. pigeons
& mallards)
• Mode of transmission: Contact with
(ingestion or inhalation of) bacterial
spores
• Early: fever, headache, chills, upper
respiratory infections
• Advanced: enlarged spleen and liver,
vomiting, diarrhea, depression,
disorientation and delirium
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Echinococcosis(aka Hydatidosis)
• Pathogen: Echinococcus spp.
• Foxes and coyotes
• Mode of transmission: oral --
accidental ingestion of larval cystic
stage of tapeworms
• Less severe: allergic reaction if
antigens leak from cysts in liver,
lungs, kidneys or spleen
• More severe: formation of abscesses;
compromised organ function;
anaphylaxis and shock if cysts rupture
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Leptospirosis• Pathogen: Leptospira interrogans
• Urine of raccoons, skunks, opossums,
Norway rats, mice, white-tailed deer
• Mode of transmission: oral & cuts --
ingestion / introduction of bacteria
from contaminated water, food and soil
• Early: fever, headache, chills,
weakness, vomiting, muscle pain,
conjunctivitis (inflammation of eyelids)
• Advanced: jaundice, kidney damage,
blood disorders, hemorrhages of the
skin and mucous membranes, death
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Toxoplasmosis• Pathogen: Toxoplasma gondii
• Feces of feral cats
• Mode of transmission: oral – accidental
ingestion of single-celled parasite from
feces and feces-contaminated soil
• Mild: no symptoms
• Moderate: swollen lymph glands and
muscle aches (flu-like symptoms)
• Severe: damage to the brain, eyes and
other organs, especially in people with
weak/compromised immune systems
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Salmonellosis• Pathogen: Salmonella enteriditis
• Feces of pigeons, house sparrows,
mallards, opossums, Norway rats,
house mice, deer mice,white-tailed deer
• Mode of transmission: oral – accidental
ingestion of bacteria from feces and
feces-contaminated surfaces
• Moderate: headache, abdominal pain,
diarrhea, nausea, vomiting
• Severe: dehydration, fever, bacterial
septicemia (blood poisoning), damage
to heart, liver or kidneys
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Lymphocytic Choriomeningitis• Pathogen: LCM Arenavirus
• Feces, urine and saliva of house mice
• Mode of transmission: oral – accidental ingestion of virus particles from excreta, saliva and contaminated food, surfaces and nesting materials
• Early: headache, fever, malaise, lack of appetite, muscle aches, nausea and vomiting
• Advanced: meningitis, stiff neck, drowsiness, confusion, sensory disturbances, motor abnormalities, hydrocephalus and myelitis (inflammation of the spinal cord)
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Hantavirus Pulmonary Syndrome
• Pathogen: Hantavirus spp.
• Feces, urine and saliva of deer mice
and white-footed mice
• Mode of transmission: oral – inhalation
of virus particles from excreta, saliva
and contaminated nesting materials
• Early: fever, headache, myalgia
(muscle pain) and dry cough
• Advanced: acute pulmonary
insufficiency (pneumonia-like); fluid
accumulation in lungs; respiratory
failure (in ~60% of cases)
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Precautionary Measures• Personal protective equipment:
> Disposable gloves
> Disposable coveralls
> HEPA respirator
• Risk-reducing practices / habits
> Frequent washing/sanitizing of hands
> Sanitizing of clothing and leather gloves
> Sanitizing service vehicle cargo bed
> Sanitizing traps
* Sanitizers can be soap/detergent-based,
alcohol-based, bleach-based or combination.
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Stinging Insects
Yellowjackets> 16+ species in the U.S.
> 2 common Ohio species
> Reproductives emerge in late summer and mate.
> Mated females (new queens) overwinter in tight cavities and insulated voids.
> Queens establish starter nests in early June
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Stinging Insects
Yellowjackets
• German yellowjacket
(Vespula germanica)
> One of the most
economically
important species in
the world.
> Abundant in the
eastern and
Midwestern U.S.
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Stinging Insects
Yellowjackets
German yellowjacket
nest in soffit
> Annual nests in the
North; perennial nests
in warm climates
> Occupy larger
structural voids
> Tens of thousands of
individuals in nest by
October.
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Stinging Insects
Yellowjackets
• Eastern yellowjacket
(Vespula maculifrons)
> Another abundant
species in the eastern
and Midwestern U.S.
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Stinging Insects
Yellowjackets
• Baldfaced or white-faced hornet(Dolichovespulamaculata)
> Not a true hornet; actually a species of yellowjacket
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Stinging Insects
Yellowjackets
Baldfaced hornet
nest
> Nests on trees, shrubs
and sheltered
recesses of buildings
> Usually 250 – 500
individuals per
mature colony / nest
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Inside a baldfaced hornet nest
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Stinging Insects
Yellowjackets
Baldfaced hornet
nest
> Nests on trees, shrubs
and sheltered
recesses of
buildings
> Usually 250 – 500
individuals per
mature colony / nest
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Stinging Insects
Polistes paper wasps
> 17+ species in the U.S.
• Northern paper wasp(Polistes fuscatus)
> Previously the most common species in the Midwest and North
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Stinging Insects
Polistes paper wasps
• Metricus paper wasp
(Polistes metricus)
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Stinging Insects
Polistes paper wasps
• European paper wasp (Polistes dominula)
> Looks like a yellowjacket
> Introduced to the U.S.
east coast in 1981
> First noticed in Ohio in 1992
> Anticipated distribution coast to coast
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> Extremely alert to motion within several feet of nest
> Less discriminating than most other paper wasps in choosing nesting sites
> Vertical anchoring surfaces commonly used for nests
> Nests established earlier in spring than those of native species
> Numbers increase at greater rate
More on the European paper wasp
Photo courtesy of Gene White
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Stinging Insects
Polistes paper wasp
nests
> Umbrella-like shape
> Attached by one or
more paper stalks
> Exposed
developmental cells
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Stinging Insects
Mud daubers
> Provision larvae with
paralyzed spiders
• Organpipe mud
daubers
( Trypoxylon politum,
T. clavatum )
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Stinging Insects
Mud daubers
Organpipe mud dauber nest
> Developmental cells arranged end to end
within each “pipe”
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Stinging Insects
Mud daubers
• Black and yellow
mud dauber
( Sceliphron
..caementarium )
Photo: The Audubon Society
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Stinging Insects
Mud daubers
Black and yellow
mud dauber nests
> Developmental cells
arranged side by side
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Stinging Insects
Honey bees( Apis mellifera )
> Gentle strains from
Europe and Asia
Often construct
perennial hives (layers
of wax honeycombs)
in structural voids
> Some strains are dark
(e.g., German & Russian)
Photo: The Audubon Society
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Stinging Insects
Honey bees( Apis mellifera )
> Barbed sting pulls out along with venom sac and bee bleeds to death
> All other bees and wasps can sting repeatedly
Source: Zach’s Bee Photos
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Stinging Insects
Honey bees
( Apis mellifera )
> Springtime swarms
are commonplace
> Beekeepers often
collect exposed
swarms at no cost
> Keep a list of local
beekeepers handy
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. . . but once a swarm moves
inside a structure, usually
it’s up to a pest manage-
ment professional!
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Stinging Insects
Eastern carpenter bee
( Xylocopa virginica)
> Excavate tunnels in soft
structural wood in
which to rear their
larvae
> One generation per
year in the North
> Adults overwinter in
galleries
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Stinging Insects
Eastern carpenter bee
> Similar to bumble bees
(Bombus species) except for shiny, naked abdomen and larger (more muscular)
head and jaws
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Stinging Insects
Eastern carpenter bee
damage to pine
fascia board
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Carpenter Bee Entry Hole Variability
Bottom
surface
of board
Hidden
inside
surface
of board
Lower inside
and outside
surfaces of
board
Hidden
outside
surface
of board
gutter
roof
fascia
board
soffit
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Other Carpenter Bee Evidences
• Eastern carpenter bee fecal and pollen stains indicative of hidden entry hole into fascia board.
• Woodpecker damage to carpenter bee-infested fascia board.
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Stinging Insects Personal protective
equipment:
Traditional beekeeper
helmet, veil, coveralls,
& gloves.
Personal protective
equipment:
Specialty garments
(e.g. Sting Guard®)
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Stinging Insects
Anaphylactic shock / anaphylaxis:
A sudden, severe allergic reaction / hypersensitivity characterized by a sharp drop in blood pressure, urticaria, and asthma-like breathing difficulties caused by exposure to a substance, such as a foreign protein or insect venom, after a preliminary or sensitizing exposure. The reaction may be fatal if emergency treatment, including epinephrine injections, is not given immediately.
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Stinging Insects
• Personal protective
equipment:
> Sting pain reliever product
(i.e., topical anesthetic,
ammonia solution, MSG
solution)
> Emergency kit with epipen
to buy time until sting
victim can be attended by
a health care professional /
EMS.
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Spiders
All spiders have venom but few
are dangerous to humans.
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Hourglass Spiders(Theridiidae)
Black (southern) widow
Latrodectus mactans
Northern widow
Latrodectus variolus
Neurotoxic venom-
affect central nervous system
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Brown / Violin Spiders(Sicariidae)
Brown recluse
Loxosceles reclusa
Mediterranean recluse
Loxosceles rufescens
Cytotoxic venom-
tissues killed, causing lesion
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Conditions That Have Been
Misdiagnosed as Recluse Bites:
Bacterial infections:Streptococcus spp.
Staphylococcus spp.
Methicillin-resistant
.Staphylococcus
aureus (MRSA)
Herpes simplex
Herpes zoster (shingles)
Diabetes ulcer
Fungal infection
Insect bites:Assissin bug
Bed bug
Fleas
Erythema multiforme
Pyoderma gangrenosum
Lymphomatoid papulosis
Localized vasculitis
Squamous cell carcinoma
Syphilitic chancre
Lyme disease
Chemical burns
Poison ivy / oak dermatitis
Best de-bunking website:
http://spiders.ucr.edu/
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Harvestmen(Opiliones: Phalangiidae)
Are daddy-longlegs
spiders?
Are they venomous?
No and No.
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Snakes
Most snakes
encountered in
Ohio are non-
venomous.
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Snakes• Don’t be fooled by saddle-
like patterns along the
length of the body. Many
harmless snakes are multi-
colored, including:
• juvenile black rat snakes,
• northern water snakes,
• fox snakes, • milk snakes,
• corn snakes, • king snakes,
• garter snakes and others
Juvenile black rat snake
Northern water snake
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Snakes
Eastern fox snake Eastern milk snake
Corn snake Eastern garter snake
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Snakes• The few venomous species, pit
vipers, that occur in Ohio are
the Massasauga or pygmy
rattle snake, timber rattle snake
(both rarely encountered in
mostly undisturbed, wild
settings) and the copperhead
(found near creeks and streams
in rural, wooded settings)
Timber rattle snake
Massasauga rattle snake
Copperhead
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Snakes
• If bitten by a non-venomous snake, wash bite area.
An ensuing infection is possible.
• If bitten by a venomous snake, keep calm but seek
immediate medical attention. Contact Nationwide
Children’s Hospital / Central Ohio Poison Center:
( http://www.nationwidechildrens.org/poison-center ;
800-222-1222 ).
• Antivenin may be available for treatment.
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If only I had worn my
PPE !