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Peer-reviewed veterinary case report

Dog with anal bleeding and blindness from Prototheca infection

By Hosaka, Satoshi & Hosaka, Mari·Published in The Journal of veterinary medical science·2004·Hosaka Animal Hospital, Japan·View original on PubMed

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Original publication title: A case report of canine protothecosis.

Species:
dog

Plain-English summary

A 10-year-old spayed mongrel dog was brought in because she had repeated episodes of bloody stools and anal bleeding. Although she was active and eating normally, her condition didn’t improve with treatment using sulfasalazine, and she eventually lost vision in one eye. Further tests revealed an infection caused by Prototheca zopfii, a type of algae. Sadly, after losing vision in her other eye, the dog passed away, showing signs of neurological issues.

People also search for: dog bloody stools treatment · dog eye problems · Prototheca infection in dogs · dog anal bleeding causes

Abstract

A 10-year-old spayed mongrel dog was referred with repeated intercurrent hematochezia and anal bleeding. The dog was vigorous and had a normal appetite, and the fecal test showed no abnormal signs. Despite treatment primarily with sulfasalazine, the condition did not improve and unilateral blindness developed. A Prototheca zopfii infection was identified by further examination with bowel culture on Sabouraud's agar without cyclohexane and antibiotics. Subsequent to a vision loss in the other eye, the dog died showing signs of neurological disorder.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/15187378/