saccharopolyspora rectivirgula saccharopolyspora rectivirgula saccharopolyspora rectivirgula is a species of bacteria. it is a gram-positive rod. it was formerly known as micropolyspora faeni. saccharopolyspora rectivirgula scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: pseudonocardiales family: pseudonocardiaceae genus: saccharopolyspora species: s. rectivirgula binomial name saccharopolyspora rectivirgula(krassilnikov and agre 1964) korn-wendisch et al. 1989 synonyms faenia rectivirgula (krasil'nikov and agre 1964) kurup and agre 1983 micropolyspora faeni cross et al. 1968 (approved lists 1980) micropolyspora rectivirgula (krassilnikov and agre 1964) prauser and momirova 1970 (approved lists 1980) thermopolyspora polyspora henssen 1957 "thermopolyspora rectivirgula" krasil'nikov and agre 1964 inhalation of the bacteria can cause the disease farmer's lung, a type of hypersensitivity pneumonitis. handling hay bales increases exposure to the bacteria and increases the risk of developing the disease.