Table 1.

Database search strings and number of unique results.

Database	Search Strategy	Number of Results
PubMed	Title: ((feline[Title] OR cat[Title] OR cats[Title]) AND (prevalence[Title] OR incidence[Title] OR detection[Title] OR surveillance[Title] OR occurrence[Title] OR epidemiol*[Title])) AND (URI[Title] OR respiratory[Title] OR URTD[Title] OR FHV[Title] OR FeHV[Title] OR “FHV-1”[Title] OR “FeHV-1”[Title] OR herpes*[Title] OR calici*[Title] OR chlamyd*[Title] OR bordetella[Title] OR mycoplasma[Title]) AND (journalarticle[Filter]) Refine by Document Type: Articles	134
Web of Science	Title: TI = (feline OR cat OR cats) AND TI = (prevalence or incidence or epidemiolog* or surveillance or occurrence or detection) Abstract: AB = (FHV or FeHV or “FHV-1” or “FeHV-1” or herpes* or calici* or bordetella or chlamyd*) OR AB = (flu or URI or FURTI or URTD) Refine by Document Type: Articles	122
Medline	Title: TI (feline or cat or cats) AND TI (epidemiology OR prevalence OR detection OR incidence OR identification OR surveillance OR occurrence) Abstract: AB (flu or herpes or herpesvirus or URI or URTD or FURTI or URTI or calici or calicivirus or FHV or FCV or FHV1 or FHV-1 or FeHV or FeHV-1 or mycoplasma or chlamydia or chlamydophila or bordetella) Entire Text: TX (respiratory OR flu OR shelter OR rescue OR “URI” OR “URTD” OR chlamydophila OR herpesvirus OR calicivirus) Limiters—Scholarly (Peer Reviewed) Journals Expanders—Apply related words; Apply equivalent subjects Search modes—Boolean/Phrase	152
Science Direct	Title: (Feline OR cat) AND (epidemiology OR prevalence OR detection OR incidence OR identification OR surveillance OR occurrence) Title, abstract, keywords: “FHV” OR “FeHV” OR “FHV1” OR “FeHV1” OR Calici OR Herpes OR chlamydia OR mycoplasma OR respiratory Entire text: respiratory OR flu OR shelter OR rescue OR “URI” OR “URTD” OR chlamydophila OR herpesvirus OR calicivirus Research Articles ONLY	48