TABLE 4.

Summary of avian tissue attachment of low pathogenic avian influenza viruses based on the literature^a

^aThis table summarizes previous studies on LPAIV-tissue attachment and lists all avian species investigated. For each study, a positive score is listed for a species-subtype combination if the virus attached to a tissue from at least one individual (i.e., numerator). For each species-subtype combination, the number of studies is listed (i.e., denominator). –, species-subtype combination not investigated; RT, respiratory tract; DT, digestive tract.