（音佑。《纲目》）
【释名】黄鼠野狼（《纲目》）、 鼠（音生去声）、 鼠（音谷）、地猴。
时珍曰∶按《广雅》，鼠野狼即鼬也。江东呼为 。其色黄赤如柚，故名
。此物健于捕鼠及禽畜，又能制蛇虺。《庄子》所谓骐骥捕鼠，不如狸 者，即此。
【集解】时珍曰∶鼬，处处有之。状似鼠而身长尾大，黄色带赤，其
气极臊臭。许慎所谓似貂而大，色黄而赤者，是也。其毫与尾可作笔，严冬用之不折，世所
谓鼠须、栗尾者，是也。
肉
【气味】甘，臭，温，有小毒。
【主治】煎油，涂疮疥，杀虫（时珍）。
心、肝
【气味】臭，微毒。
【主治】心腹痛，杀虫（时珍）。
【附方】新一。
心腹痛∶用黄鼠心、肝、肺一具，阴干，瓦焙为末，入乳香、没药、孩
儿茶、血竭末各三分。每服一钱，烧酒调下，立止。（《海上仙方》）
（《拾遗》）
【释名】甘口鼠。
时珍曰∶鼷乃鼠之最小者，啮人不痛，故曰甘口。今处处有之。
【集解】藏器曰∶鼷鼠极细，卒不可见。食人及牛、马等皮肤成疮，至死不觉。《尔雅》
云有螫毒，《左传》云“食郊牛角”者，皆此物也。《博物志》云∶食人死肤，令人患恶疮；
《医书》云∶正月食鼠残，多为鼠 ，小孔下血者，皆此病也。治之之法，以狸膏摩之，及
食狸肉为妙。鼷无功用，而为人害，故着之。
(Yin "You". From *Bencao Gangmu* [Compendium of Materia Medica])
[Names] Huangshu Yelang (Yellow Weasel Wild Wolf) [from *Bencao Gangmu*], Tu (pronounced "Sheng", departing tone), Qu (pronounced "Gu"), Dihou (Earth Monkey).
Li Shizhen states: According to *Guangya*, the Shuwulang is the You (Mustela sibirica, Siberian weasel). In the Jiangdong region, it is called Tu. Its color is yellowish-red like a pomelo, hence the name Tu. This creature is adept at catching mice and poultry/livestock, and can also subdue venomous snakes. What Zhuangzi referred to as "a thoroughbred horse is not as good as a cat in catching mice" refers to this animal.
[Analysis] Li Shizhen states: The You is found everywhere. It resembles a mouse but has a longer body and larger tail; its color is yellow with red hues, and its odor is extremely musky and foul. What Xu Shen described as resembling a marten but larger, with yellow and red coloring, is this animal. Its fur and tail can be used to make brushes; they do not break even in severe winter cold. These are what the world calls "mouse-hair brushes" and "chestnut-tail brushes."
[Meat]
[Properties and Flavors] Sweet, foul-smelling, warm in nature, slightly toxic.
[Indications] When rendered into oil and applied to sores and scabies, it kills parasites (Li Shizhen).
[Heart and Liver]
[Properties and Flavors] Foul-smelling, slightly toxic.
[Indications] Epigastric and abdominal pain, kills parasites (Li Shizhen).
[Attached Prescriptions] New Prescription 1.
Epigastric and Abdominal Pain: Take one set of the heart, liver, and lungs of a yellow weasel. Dry them in the shade, then roast on a tile until dry and grind into powder. Add three fen of powdered Rush Xiang (Boswellia Carterii Resin), Mo Yao (Myrrha), Hai'er Cha (Camellia sinensis var. assamica tea for children), and Xue Jie (Dragon's Blood). Take one qian per dose, mixed with distilled liquor (Baijiu). The pain will stop immediately. (From *Haishang Xianfang* [Immortal Formulas from the Sea])
(From *Bencao Shiyi* [Supplement to Materia Medica])
[Names] Gankou Shu (Sweet-Mouth Mouse).
Li Shizhen states: Xi is the smallest type of mouse. Its bite causes no pain, hence the name "Sweet-Mouth Mouse." It is found everywhere today.
[Analysis] Chen Zangqi states: The Xi shu is extremely tiny and difficult to see suddenly. It eats the skin of humans, cattle, and horses, causing ulcers, which go unnoticed until death. *Erya* mentions its stinging toxicity; the reference in *Zuo Zhuan* to "biting the horns of sacrificial oxen" refers to this creature. *Bowuzhi* states that eating human cadaverous skin causes malignant ulcers; *Yishu* states that consuming food damaged by mice in the first lunar month often leads to Shu Lou (scrofula/lymphatic tuberculosis) with bleeding from small pores. The treatment method involves massaging with marten paste and eating marten meat, which is considered excellent. Since the Xi shu has no medicinal utility and poses a harm to humans, it is recorded here.