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An Overview of Camelids in
the United States
Patrick Long DVM
Camelid Healthcare Services
Corvallis Oregon
Camelids in US
• My perceptions of the industry as a practicing veterinarian working with camelids since 1982. I have worked closely with the owners association for the past several years and participated in several imports to the US and a recent export to Japan.
Camelids
• Ask questions if I speak to quickly or
something is not clear.
• Feel free to cut me off as needed!
Goals
• Introduction to Camelid Evolution
• Overview of Camelids in the US
• Diseases/conditions of concern
to US producers
Origins
• Origins in North America 11-9 million years
ago.
• 3 million years ago, migration occurred
across the Siberian land bridge—camels
• Migration south across the Panama
Isthmus resulted in South American
camelids.
Spanish Conquest Effects
• South American Camelids (SAC)
domesticated approximately 6,000 years
ago
• Widespread thru all of South America
• Pre Inca cultures started domestication
process but perfected by the Inca empire
• Spanish conquest of South America
decimated the SAC and native people
The Camelidae Family
Camelus dromedarius Lama glamaVicugna pacos
Camelus bactrianus Lama guanacoeVicugna vicugna
Camelids in US
• Alpaca numbers— 300,000
• Llama numbers--- apx. 125,000
• Not all llamas and alpacas are
registered—so this is a bit of an educated
guess.
• 94 million cattle
• 5.32 million sheep
• 2.62 million goats
Bottlenecks
• Spanish conquest in 1532 resulted in 90%
loss of all camelids in South America.
• Native people were decimated and much
of the knowledge of raising camelids was
loss.
• Camelids were forced into the highlands
where sheep did not do well.
South American numbers
• Approximately 6.5 million llamas and
alpacas in South America
• Reported that 85 % are owned by small
farms with flocks of 30-300
• Large cooperatives can have over 40,000
alpacas located on several farms
Southern Peru
Congenital Defects
• SAC known for high percentage of
congenital defects.
• Many are observed at birth:
choanal atresia
atresia ani
heart defects
Some not obvious till older:
reproductive anomalies
Cria Carepage81
Camelids in US
• Most farms in the US are single species farms. Most alpaca farms have no other livestock species—thus limiting spread of certain diseases. Many llama farms are more hobby farms—multiple species.
• Farm sanctuaries exist with multiple species at times.
• Show circuit is large with alpacas—regional and national shows may have over 1500 animals present. Great potential for horizontal transmission.
Concerns of US producers
• Following list (in no particular order) are
concerns facing US producers
Parasites
• Internal---Nematodes, Trematodes,
coccidia
• External
• Mites--- Chorioptic, Psorotic, Demodex
Camelid Parasites
• Many sources of general information on
parasites are available. While not specific to
alpacas or llamas, a very useful site is
(sheepandgoat.com). Another good website
is wormx.info (American consortium for small
ruminant parasite control)
• Parasites are common in large animals, it is
probably not realistic to expect that we will
eliminate, but we should control them with
medications and management.
Resistant GIN
• Early studies indicate there are resistant
Gastrointestinal nematode parasites
• Probably linked to P. tenuis control
strategies and overuse and misuse of
deworming products.
Parasite control
• Strategic deworming
• Strategies:
Do not feed hay on ground
Keep feces cleaned off ground
Do not overstock pastures
Rotational grazing
Deworm at appropriate time of year
Parasite Control
• Where do I start?
• Fecal Samples 10 animals or 10% of
herd, which ever is more.
• Fecal Sample 10-14 days post de-
worming to determine potential resistance.
• Ask what type of fecal test is being done.
float vs. McMasters vs. sugar floatation
Management must be discussed!
Parasites
• Haemonchus contortus is a major concern
for camelid owners.
• Resistance to most classes of
anthelmentics has been demonstrated on
some farms.
• Treatment with the ivermectin class for
prevention of P. tenuis is one contributing
cause.
Discussion points
• Wormx.info and sheepandgoat.com
• If you have a parasite problem on your
farm you cannot de-worm you way out
• You must change some management to
prevent re-infestation
• Healthy animals are more resistant to
parasitism
Coccidiosis
• Small coccidia---common
• Large coccidia-E mac.---emerging problem
due to increased pathogenicity and long
pre-patent period.
• Current research includes development of
an Elisa and PCR tests for early detection
of E. mac.
Coccidia of
camelids
Giardia and Cryptosporidum
• Both organisms isolated from animals with
diarrhea.
• Cryptosporidium---recent report links
cases in alpacas and cases in farm
workers and veterinary students
• Giardia—reported as cause of neonatal
diarrhea
TB
• M. bovis isolated in England and Ireland
• M. microti isolated in Switzerland
• Appears to connected to cattle and
badgers in England and Ireland
• New serologic tests are now available
• Intradermal test not effective in
Switzerland for M. microtii or in Ireland for
M. bovis.
Bluetounge
• Sporadic cases reported in US
• BTV8 has been a concern in Europe, with
fatal case/cases reported.
• Vaccine trials have been completed in
alpacas in England (Bovilis BTV8-Intervet)
and has been shown to produce
antibodies after 2 doses of the vaccines.
EEE
• Previous reports from East Coast several
years ago
• Vaccine study has been done—no
adverse events and antibody response
demonstrated, but no challenge studies
have been done.
West Nile Virus
• Recent history—few reported cases in
camelids.
• Several cases reported in early 2000’s
• Several studies have been done—vaccine
needs to be used differently than
recommendations for horses. Most
animals will develop antibody response.
• Not widely used in industry
Johnes disease
Incidence/ Concern?
Several reported cases in Australia
Coronavirus
• Common cause of diarrhea in neonates and
post show animals
• May be responsible for “snots” or upper
respiratory disease seen a few years ago after
shows.
• MERS—Middle East Respiratory Disease can
affect llamas—experimentally but no naturally
occurring cases reported
Corona Virus
• Completed Research:
• UC Davis: Investigation of a Novel
Respiratory Coronavirus in Alpacas:
Diagnostic Test Development and Initial
Prevalence Assessment—Beate Crossley
• Initial Study by Dr. Crossley—
Characterization and Id of Novel
Coronavirus.
BVDV
• Many cases of PI crias reported
• Most cases are one serotype
• Appears to be horizontal spread
• Active surveillance by owners and Breed group
• Owners are becoming less vigilant, so may
become a larger issue
• Low incidence/high impact problem for Owners
BVDV Research
• Sequencing BVDV strains—Dr. John
Neill—Ames Iowa, National Animal
Disease Center
• Experimental Exposure of naïve Alpacas
to BVDV virues 1a,1b and 2—Jason
Johnson, Auburn University
Prion Disease
• Prion Disease was recently described in a
Camel in Algeria
• To my knowledge, no prion diseases have
been described in llamas and alpacas
Equine Rhinopneumonitis
• Camelids are susceptible
• Not aware of recent cases
• Current situation in horses could pose a
risk for camelids.
Mycoplasma haemolamae
• Formally called Eperythrozoonosis
• Incidence reports of apx 20% in
Switzerland, US and South America
• Probably a 2ndary concurrent problem
• Anemia can be striking
• PCR is best way to diagnosis
• Current research funded by MAF and
Alpaca Research Foundation
Strep equi sp Zooepidemicus
• Known as “alpaca fever”
• Sporadic reports and one “herd outbreak”
• Fever, depression, anorexia
• Systemic infection can involve lungs, and
serosal surfaces of thoracic and
abdominal cavities.
Miscellaneous
• Brucellosis
• FMD
• Chorioptes Mites
• MCF
• Tick Borne diseases—Alpacas could be a
reservoir but are not checked
extensively—no recognized problems at
this point