The major purpose of the research was to study the prevalence, clinical progression and treatment of Chlamydia in cats with an azithromycin-based drug.AllissuesVolume210(2020)E3SWebConf.,210(2020)06018AbstractOpenAccessIssueE3SWebConf.Volume210,2020InnovativeTechnologiesinScienceandEducation(ITSE-2020)ArticleNumber06018Numberofpage(s)8SectionLivestockandVeterinaryDOIhttps://doi.org/10.1051/e3sconf/202021006018Publishedonline04December2020E3SWebofConferences210,06018(2020)RetrospectiveanalysisofthespreadofcatchlamydiaandfeaturesofitstreatmentwithadrugbasedonazithromycinAlexeyStrugovschikov,NikolayPudovkin*,PetrSmutnevandIvanSubbotinSaratovStateAgrarianUniversitynamedafterN.I.Vavilov,410005,SokolovayaStreet,335,Saratov,Russia*Correspondingauthor:niko-pudovkin@yandex.ruAbstractTheChlamydialesorderbacteriaareeukaryoticcellsobligateintracellularparasites.Themajorpurposeoftheresearchwastostudytheprevalence,clinicalprogressionandtreatmentofChlamydiaincatswithanazithromycin-baseddrug.Atotalof3,388samplesforchlamydiawerestudiedin2019,ofwhich243provedtobepositive.Chlamydiawasdiagnosedusingthepolymerasechainreaction(PCR)technique.TheAzithronitdrugwasadministered0.5mlperanimal,1timeperday,for7days.HematologicalparametersweredeterminedusingtheIDEXXLaserCytehematologicalanalyzer,whilethebiochemicalparametersweredeterminedusingtheIDEXXCatalistanalyzer(USA).InMoscow,chlamydialinfectionplaysasignificantroleinthecatsinflammatoryeyediseasesetiology.TheoverallinfectionrateoftheMoscowcatpopulationtotalled7.2%.Inyounganimals,theincidencewashigher(28.3%)thaninadults(19.5%).Intermsofgender,theincidenceofchlamydiainfemalecats(56%)washigherthaninmales(44%).Themainformsofchlamydiamanifestationswerethoseofpurulentandserousconjunctivitis-69.8%and20.5%,respectively,keratitis-8.7%.Thetreatmentwithazithromycin-baseddrugsrequiresonlyasingledailyadministrationfor7daystoensuretheclinicalsignselimination.©TheAuthors,publishedbyEDPSciences,2020ThisisanOpenAccessarticledistributedunderthetermsoftheCreat