common problems of tortoises sdt&ts
TRANSCRIPT
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Thomas H. Boyer, DVM, DABVP, Reptile & Amphibian Practice
Pet Hospital of Penasquitos
9888-F Carmel Mountain Road, SD, CA
858-484-3490
www.pethospitalpq.org
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Dr. Boyer
1985 UC
1989 DVM CSU
1991 ARAV
1994, 1998 AAHA books
1991-2008 Editor-in-Chief, BARAV, JHMS
1999 bought PHP
2007 AAHA accredited
2011 Diplomat ABVP
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BARAV & JHMS
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Diagnostic Challenge
History – If owner feels something wrong, there generally is. Must know husbandry.
PE - Do not delay workup
Bloodwork – CBC, chemistry panel, protein electrophoresis, thyroid
Fecal – Direct & Flotation
3 view radiographs
Laparoscopic biopsies
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Dorsoventral view
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Lateral Horizontal beam
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Anterior Posterior Horizontal
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Horizontal beam
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SubCarapacial Venous Plexus SCVPSupravertebral sinus
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Subcarapacial venous plexus
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Dorsal recumbency
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Surgical prep – watch eyes
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Needle size, stabilize
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Watch for lymph contamination
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Jugular venipuncture with butterfly catheter
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African species – Use Telazol!
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Upper Respiratory Tract
Desert tortoise heads A – Longitudinal section
• B - Transverse section
Nasal cavity leads to choanae, contains dorsal olfactory epithelium, ventral mucous epithelium
With Mycoplasma – Nasal cavity fills with exudates, loss of mucosal glands, infiltrates of LC’s & HC’s, olfactory mucosa infiltrates of HP’s, breakdown of tissues, debris
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Mycoplasma agassizii, M testudineum
Clinical signs – Clear serous to tenacious mucous nasal discharge, bubbling, clogged nares, nare erosion, rhinitis, caseous blockage, palpebral edema, conjunctivitis, decreased appetite, weight loss, death
Extremely contagious via nasal exudates, horizontal, direct or short distance (< 0.5 m)
Indirect & vertical unlikely
More common in winter
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DiagnosisClinical signs suggestive – Push head into
shell, nasal discharge abnormal!
DDX – Herpesvirus, iridovirus, IN cocidiosis, oronasal fistula, nasal foreign body, GI impaction & regurgitation
ELISA Ab test (serum, > 8 wks), PCR (discharge) U of FL
Culture – Not rec’d
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Differential diagnoses
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Mycoplasmosis TreatmentSanibel Island - Untreated mortality 30% (50%?)
Antibiotics for 3-6 weeks
Enrofloxacin, danofloxacin, clarithromycin, tetracyclines
Neomycin-Polymyxin B-Dexamethasone nasal drops for 3 weeks
Nasal flushes
Supportive care if indicated
Isolate from other tortoises, chronic carriers
Relapse common but less severe
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Nasal flushing
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Pack cotton ball over glottis
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Pack cotton ball over glottis
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Flush each nare with 1:10 enrofloxacin:saline
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Flush mucous out of nares
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Note thick mucous
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Chronic malnutrition Dietary history & R/O other disease
Hypoalbuminemia < 1.0 mg/dL (normal DT > 2.5 mg/dL) or anemia (PCV < 15%)
Suggestive for hepatic lipidosis or other chronic disease – mycoplasmosis, intestinal impaction, bladder stones
Dx – Endoscopic liver biopsy
Tx – Based on underlying ds, will need esophagostomy tube , no surgery until liver recovered
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Esophagostomy tube
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Nutritional secondary hyperparathyroidism
Dietary history
Small tortoises – Fail to grow or gain weight, soft shell, splayed legs, fail to lift plastron while walking, poor to no appetite
Prognosis
If not eating don’t survive (kidney failure?)
If eating much better prognosis
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NSHP – Soft shell
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NSHP – Failure to grow, upturned marginals, legs splayed out, increased vertical bridge growth
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NSHP- Legs spayed out, not lifting plastron, soft shell, increased vertical growth
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Nutritional secondary hyperparathyroidism
Adult onset
Shell usually solid
New growth abnormal –Marginals curl dorsally, increased vertical growth of bridge, don’t lift plastron well while walking, anterior maxillae curves - parrots beak, penile prolapse, shell too small
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NSHP – Abnormal growth in seams
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Parrots Beak
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Parrots Beak
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NSHP - Penile prolapse
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NSHPAll tortoise’s shells should feel solid, like skull, even in young turtles (≈ 1 yr)
Exception –Pancake tortoise
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Poor bone density – Coracoid, pubic bones
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Normal vs. NSHP
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Shell Trauma Dog gnaw trauma Stabilize patient, AB’s, pain
meds, nutritional, fluid support, th0roughly clean & flush wounds, wet to dry bandages,
Once stable & wounds clean (1 wk) repair shell fractures with metal wires, bridges, suture, 5 min epoxy & polypropylene gauze
Severe cases often fatal
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Shell TraumaCoelomic punctures most serious, no pneumothorax
Shell heals inside out, new shell forms under damaged shell
Chelonians capable of regenerating most of shell
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Oxyurids - 5 genera, 12 sps
Pathogenicity debatable
Direct life cycle –super infection?
Normal flora
• Treatment Fenbendazole on food or via ST SID x 5, repeat tx in 2-3 wks
• Per cloacal
• Ivermectin toxic in chelonians
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Overgrown Rhamphotheca
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Beak trim - Use Telazol
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Underlying inadequate nutrition Hepatic lipidosis?
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Cystic calculiUric acid & ammonium acid urate
Generally palpable
Predominate in left lobe of bladder
Inappropriate diet & lack of access to water
Definitely a problem
Obstruct or torse colon, bladder necrosis or torsion, gradual decline, weight loss, death
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Cystic calculi
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Cystic calculi
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Torsed cecum (left), necrotic, torsed bladder lobe with urolith (right)
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Intestinal impactions Ca deficient diet – Will seek rocks
Anorexia, listlessness, lack of defecation, regurgitation, straining to defecate
Small amounts of gravel in GI tract normal as long as appetite & defecation normal
Most commonly at distal transverse colon as it turns posteriorly into descending colon (caudal left coelom)
If eating – Pysllium fiber on food or via ST, repeat rads q 2 -4 wks
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GI Anatomy – Belly up
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Rock Sand
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Decomposed Granite Sand, grass & rock
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Distended loops of bowel in lung field
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Total obstruction
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Egg retention Palpable in inguinal fossa
Female often pacing, several false nests
Oxytocin
1- 3 tx’s q 90 min
Calcium, fluids
Make sure area to dig
Celiotomy if not responsive except if egg in pelvis
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Break down, extract per-cloacally
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Corneal ulcers Squinting, rubbing forelimb at eyes
Foreign bodies – Sand, hay, foxtails
Bacterial or fungal infection
Anesthetize, flourescein stain, debride, flush, tarsorrhaphy (10 - 20 days)
Cytology
Topical & systemic antibiotics & pain meds
Chelonians have no NL duct
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Post-hibernation anorexia Hibernation emergence is common time for other ds.
to manifest – Mycoplasmosis, hepatic lipidosis, renal ds.
More common in northern latitudes
Hibernation - Tortoises should loose < 6-7% BW (1%), < 3 months, soak q 2 wks
Should start eating, drinking, urinating within 1 wk of emergence, no urination poor prognostic sign
Workup – CBC, Chem panel, PE, urinalysis, rads, fecal
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Post-hibernation anorexia Abnormalities – Hyperuricemia, hyperkalemia,
hypoglycemia, hypoproteinemia
UA > 34 mg/dl, K > 35 mg/dl will die
Acidic urine
Treatment – Directed at underlying ds., AB’s
Fluids via ST, epicoelomically, intracoelomically until urinating well
Shallow lukewarm water soaks BID
Anorexia – Esophagostomy tube
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Retained follicles Follicles that fail to ovulate or undergo atresia remain
stagnant for months become necrotic, inspissated, or rupture & cause egg yolk coelomitis
Females often anorexic w/ hepatic lipidosis
Chemistry – Elevated Ca, Alb, TP, AP
CBC – Anemia with heteropenia
DX – Celioscopy or US
Tx – Oophorectomy, supportive care. Avoid CI’s
Plastronal celiotomy
Endoscopic flank incision
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Plastronal Celiotomy Oophorectomy
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Oophorectomy
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Oophorectomy
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Oophorectomy
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Breakfast?
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Protozoans & Amoeba Trichomonads, monocercomonads, hexamitans
Anorexia, polydipsia, diarrhea, renal ds.
Responds to metronidazole
• Amoeba –
Causes weight loss, serious ds
Tx’d with Flagenase 400 Pediatrico (metronidazole & iodoquinol) via esophagostomy tube
Repeat fecals after tx to gauge efficacy
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Ectoparasites Ticks are rare, don’t see in San Diego
Amblyomma ticks harboring heart water disease, Erlichia ruminatum, found in environment around imported tortoises in FL
2000 - Ban on importation & interstate sale of Geochelone pardalis, G. sulcata, Kinixys
Later determined tortoises were not a heart water vector
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Herpesvirus Necrotizing stomatitis,
glossitis, pharyngitis, diptheritic plaques, nasal discharge, anorexia, cachexia, rapid death (esp. w/ die offs)
Eosinophillic intranuclear inclusions
Russian tortoises, Testudo horsfieldi – Carrier?
Acyclovir PO TID x 21 days. E-tube
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Herpesvirus
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Alphaherpesvirinae Herpesvirus of
tortoises
Fibropapillomatosis
Grey patch disease
Lung eye tracheal ds.
Hepatic necrosis in freshwater turtles (Clemmys, Chrysemys, Graptemys)
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Intranuclear coccidiosisRare, unidentified species of Coccidia
Contagious fatal epidemic disease
Sudden death, rapid weight loss, weakness, gasping respiration, swollen erythematous, necrotic cloacal crusts. Gets into all tissues.
Diagnosis typically post-mortem
PCR UFL
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Exuberant epiplastronMale Geochelone
sulcata, Gopherus agassizii
Dx & Removal rarely indicated
Only remove if interfering with eating
Amputate sterilely, seal with polypropylene gauze & epoxy
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DrowningFound at bottom of swimming pool
Can survive long periods underwater
If unsure alive – ECG or Doppler US
Hold head down, pump legs, IPPV
Ab’s for 3 wks
Furosemide not effective in reptiles (no loop of Henle)
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