Presentation on theme: "Alopecia in a captive koala"— Presentation transcript:
1 Alopecia in a captive koala Tarra JohnsonBiology DepartmentEastern CT State University
2 An undescribed Demodex sp An undescribed Demodex sp. and Demodicosis in a captive Koala (Phascolarctos cinereus) Journal of Zoo and Wildlife Medicine, 2000, 31(1):Linda J. Vogelnest,, B.V.Sc., M.A.C.V.Sc., Larry Vogelnest, B.V.Sc., M.V.S., and Ralf S. Mueller, F.A.C.V.Sc., Dip.A.C.V.D.
3 AlopeciaDescribed by the dictionary - n : loss of hair (especially on the head) or wool or feathers; in humans it can result from heredity or hormonal imbalance or certain diseases or drugs and treatments (chemotherapy for cancer)Not all Alopecia is cancer related
5 Demodex sp. of Mites Very small, only 0.1- 0.4 mm. Usually present in mammals with out problems.High percentage of mites found in older people with out symptoms.Often inflamed by bacterial infection and host factorsDistinctive shape fused head and thorax
6 Demodex sp. PicturesHuman follicle miteCaused by Demodex canis
7 Alopecia near the eye Easily accessible for bacteria Deep skin scrapings confirm mitesAlong with inflammation, redness and swellingHair follicle plump, short and sebaceous glands prominent appearing below the bulb of hair follicle
8 Demodex in the Koala’s Skin Commonly called follicle mitesOften found in the hair follicles and sebaceous gland of the face.Other areasSevere cases animal may have to be euthanized
9 Treatment7 days of ophthalmic ointment containing neomycin and polymixin B, sulfacetamide sodium prednisolone.After relapse Oral IvermectinFor human cases various creamsCortisone shotsSome people use Rogaine with MinoxidilIn some cases none of the treatment work
10 Results Periocular alopecia after 3 days 6 months of treatment with same ointmentOcular discharge resolvedAlopecia remianed the same for 7 months with out treatmentAlopecia became more extensiveOral Ivermectin used with success
11 DiscussionOther than Alopecia Koala remained healthy until death as a result of LeukemiaAbundance of mite population associated with failing T-lymphocyte function.Mild cases may lead to an underlying disease.Ivermectin is toxic and must given in small doses to build up to larger amounts
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