그랜트얼룩말에서 발생한 장결석증과 결석의 분석

A Case of Enterolithiasis in a Grant's Zebra (Equus burchelli boehmi) and Analysis of the Enterolith

  • 발행 : 2010.02.28

초록

동물원에서 사육중이던 8년령의 수컷 그랜트얼룩말이 10일간 침울, 식욕부진, 탈수, 산통의 임상증상을 보이다 폐사하였다. 부검시 하행결장과 직장의 연접부에 무게 1,660 g의 장결석(가로 13.5 cm $\times$ 세로 8 cm)이 발견되었다. 발견된 결석을 주사전자현미경과 에너지 분산형 X선 분광기로 분석한 결과 결석의 중심부는 $SiO_2$ 가 가장 많이 검출되었고, 그 외층은 마그네슘과 인이 가장 많이 검출되었다. 장결석의 생성은 미네랄 성분이 다량 함유된 알팔파 건초의 급여와 깊은 연관이 있는데, 본 예의 장결석증 또한 알팔파 건초의 급여에 기인한 것으로 판단되었다.

We describe a case of enterolithiasis in an eight-year-old male Grant's zebra (Equus burchelli boehmi) that died after a 10-day history of depression, anorexia, dehydration and colic. On necropsy, an enterolith was discovered at the conjunction of the descending colon and the rectum. The spherical enterolith weighed 1,660 g and was $13.5cm{\times}8cm$ in size. According to scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS), the nidus consisted primarily of $SiO_2$ with outer layers of magnesium and phosphate. The formation of enteroliths is closely related to diet. We suggest that this captive zebra's diet, which consisted primarily of alfalfa hay with mineral supplements, was the cause of enterolithiasis in this case. This is the first report of enterolithiasis in a captive equid in Korea. Our findings provide information valuable for the development of dietary guidelines to prevent enterolithiasis in captive wild equids.

키워드

참고문헌

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