Thank you very much! I've found the articles of Dr Wang A. and Zhu XX already. But really I'd like to find the results of the investigations of changes in microbiome of people and animals after radiation. Opportunistic oral pathogens only take free place, but wich of "good"  microbes dead first?  I am sure that the use of probiotic worsk as a sсreen system, but as we usually  can see,  they can't stay at the place so they can't be really usefull... that 's only an idea, but we should try to work more for investigation of the microbiome changes and its protection at the radiation therapy