Hernot David C, Dumon Henri J, Biourge Vincent C, Martin Lucile J, Nguyen Patrick G
Laboratory of Nutrition and Endocrinology, National Veterinary School of Nantes, BP 40706, 44307 Nantes Cedex 3, France.
Am J Vet Res. 2006 Feb;67(2):342-7. doi: 10.2460/ajvr.67.2.342.
To compare large intestinal transit time (LITT) in dogs of various body sizes and determine whether fecal quality was correlated with LITT.
6 Miniature Poodles, 6 Standard Schnauzers, 6 Giant Schnauzers, and 6 Great Danes.
LITT was calculated as the difference between total (TTT) and orocecal transit time (OCTT). Minimum and mean OCTTs were determined by use of the sulfasalazine-sulfapyridine method. Minimum TTT was estimated by use of chromium and ferric oxide as color markers, and mean TTT was calculated from the recovery from feces of ingested colored plastic beads. Fecal moisture content was determined and fecal consistency was scored during the same period.
Large-breed dogs had higher fecal moisture content and more watery fecal consistency. No association between body size and OCTT was detected, but there was a positive correlation between body size and mean TTT. Mean LITT increased significantly with body size, from 9.1 +/- 1.1 hours in Miniature Poodles to 39.4 +/- 1.6 hours for Giant Schnauzers. Significant correlations were detected among mean LITT, mean TTT, and fecal scores, whereas no correlation was observed between fecal moisture content and TTT or LITT.
LITT was correlated with fecal consistency in dogs of various body sizes. Mean LITT can be predicted from values for mean TTT in healthy dogs.
比较不同体型犬的大肠传输时间（LITT），并确定粪便质量与LITT是否相关。
6只迷你贵宾犬、6只标准雪纳瑞犬、6只巨型雪纳瑞犬和6只大丹犬。
LITT通过总传输时间（TTT）与口盲传输时间（OCTT）之差计算得出。采用柳氮磺胺吡啶 - 磺胺吡啶法测定最低和平均OCTT。使用铬和三氧化二铁作为颜色标记物估计最低TTT，并根据摄入的彩色塑料珠在粪便中的回收率计算平均TTT。在同一时期测定粪便水分含量并对粪便稠度进行评分。
大型犬粪便水分含量较高，粪便更稀。未检测到体型与OCTT之间的关联，但体型与平均TTT之间存在正相关。平均LITT随体型显著增加，从迷你贵宾犬的9.1±1.1小时增加到巨型雪纳瑞犬的39.4±1.6小时。在平均LITT、平均TTT和粪便评分之间检测到显著相关性，而粪便水分含量与TTT或LITT之间未观察到相关性。
不同体型犬的LITT与粪便稠度相关。健康犬的平均LITT可根据平均TTT值预测。
