NAVLE NAVLE Avian and Exotic Animal Medicine 2 — Questions and Answers
Question 1: Metabolic bone disease (MBD) in captive reptiles is most commonly caused by which combination of factors?
- Calcium/phosphorus imbalance and UV-B light deficiency (Correct answer)
- Excess vitamin D3 supplementation
- Bacterial osteomyelitis secondary to trauma
- Hyperthyroidism
Correct answer: Calcium/phosphorus imbalance and UV-B light deficiency
MBD in reptiles results from inadequate dietary calcium, improper Ca:P ratios, and insufficient UV-B light for endogenous vitamin D3 synthesis.
Question 2: A green iguana presents with dysecdysis (retained shed). What is the safest and most appropriate initial treatment?
- Soaking in warm water for 15–30 minutes (Correct answer)
- Forcibly removing the retained shed manually
- Applying petroleum-based lubricants
- Administering systemic corticosteroids
Correct answer: Soaking in warm water for 15–30 minutes
Warm water soaks hydrate and soften retained shed safely, making it the recommended first-line intervention for dysecdysis.
Question 3: Cryptosporidium serpentis infection in ball pythons most characteristically affects which organ, producing a pathognomonic clinical sign?
- Stomach, causing mid-body swelling and regurgitation (Correct answer)
- Small intestine, causing chronic diarrhea
- Liver, causing icterus
- Kidneys, causing gout
Correct answer: Stomach, causing mid-body swelling and regurgitation
Cryptosporidium serpentis causes gastric hypertrophy in snakes, manifesting as a classic mid-body bulge and chronic regurgitation.
Question 4: When treating a reptile patient, why is it essential to maintain the animal within its preferred optimal temperature zone (POTZ)?
- Reptiles are ectotherms, so immune function and drug metabolism depend on environmental temperature (Correct answer)
- POTZ only affects reproductive behavior, not clinical outcomes
- Temperature has no effect on antibiotic efficacy in reptiles
- POTZ is important only for feeding, not medical treatment
Correct answer: Reptiles are ectotherms, so immune function and drug metabolism depend on environmental temperature
As ectotherms, reptiles rely on external heat sources for all metabolic processes including immune response and pharmacokinetics.
Question 5: Which fungal organism causes 'yellow fungus disease' (invasive necrotizing mycosis) in bearded dragons?
- Nannizziopsis guarroi (Correct answer)
- Aspergillus fumigatus
- Candida albicans
- Fusarium solani
Correct answer: Nannizziopsis guarroi
Nannizziopsis guarroi causes yellow fungus disease in bearded dragons, producing invasive, necrotizing cutaneous lesions that are often fatal.
Question 6: Which of the following reproductive strategies describes the boa constrictor?
- Ovoviviparous — retains eggs internally and gives birth to live young (Correct answer)
- Oviparous — lays eggs that develop externally
- Viviparous — has a true placenta like mammals
- Parthenogenetic — reproduces without fertilization
Correct answer: Ovoviviparous — retains eggs internally and gives birth to live young
Boa constrictors are ovoviviparous; eggs are retained and develop internally with the female giving birth to live young without a true placenta.
NAVLE NAVLE Avian and Exotic Animal Medicine 2
Metabolic bone disease (MBD) in captive reptiles is most commonly caused by which combination of factors?