The bug in question is Lactobacillus reuteri. It is commonly found in healthy digestive systems and helps regulate acidity levels.

这种疾病的漏洞就是罗伊氏乳杆菌。其普遍存在于健康的消化系统中，并帮助调节酸度。

This existing approval, which means L. reuteri poses no known health hazard, simplifies the process of organising clinical trials.

目前的批准意味着罗伊氏乳杆菌没有已知的健康危害，简化了组织临床实验的过程。

The researchers noted that the guts of both the obese mothers and their young were bereft of L. reuteri.

研究人员注意到肥胖母亲和它们后代的肠道中都没有了罗伊氏乳杆菌。

Dr Costa-Mattioli and his team first reported L. reuteri's effects on autism in 2016, after conducting experiments with obese female mice.

Costa-Mattioli博士和他的团队于2016年首次报告了罗伊氏乳杆菌对孤独症的效果，之前他们对过度肥胖的雌性老鼠进行过试验。

The crucial aspect of this work is L. reuteri's wide availability-an availability approved by regulators such as America's Food and Drug Administration.

这项工作的关键部分在于罗伊氏乳杆菌的广泛可用性—这种可用性得到了监管者，如美国食品和药物管理局的批准。

These were normal in the mice exposed to L. reuteri, which makes sense since animals treated with the bacterium sought out more social experiences.

这些在暴露于罗伊氏乳杆菌的老鼠身长很常见，这也说得通，因为受过细菌治疗的动物会寻求更多的社会经历。

To test this idea they cut that nerve in selected animals. In these animals, subsequent treatment with L. reuteri failed to abolish their autistic symptoms.

为了测试这一想法，他们切除了选定动物的神经。在这些动物中，罗伊氏乳杆菌的后续治疗没能消除它们的孤独症症状。

The team's initial hypothesis had been that the supplementary L. reuteri were somehow changing the gut flora of the mice exposed to them into something more normal.

团队的初步假设是，添加罗伊氏乳杆菌改变了它们体内的肠道菌群，让它们变得更加正常。

They arranged for between seven and 15 mice of each of the four types to have, starting at the age of three weeks, their drinking water laced with L. reuteri.

他们组了四种类型并安排每一类型中的7到15只老鼠，从三周大的时候就开始饮用掺有罗伊氏乳杆菌的水。