title: Occurrence of airborne bacteria and pathogen indicators during land application of sewage sludge.
abstract: Glass impingers (AGI-30) were used at a commercial sludge application site to determine the levels of airborne bacteria and pathogen indicators. Even though heterotrophic bacteria averaged 10(5) CFU/m3, none of the sites showed the presence of Salmonella spp. or indicators such as fecal coliforms or coliphages. Indicators such as H2S producers and pathogenic clostridia were present in locations having significant physical agitation of the sludge material. PCR-based ribotyping using the 16S-23S interspacer region is a promising method to identify the genetic relatedness and origins of airborne clostridia.
authors.affiliation: Environmental Science Program, Texas A&M University Research Center, El Paso, USA.
authors.forename: S D
authors.initials: SD
authors.lastname: Pillai
authors.forename: K W
authors.initials: KW
authors.lastname: Widmer
authors.forename: S E
authors.initials: SE
authors.lastname: Dowd
authors.forename: S C
authors.initials: SC
authors.lastname: Ricke
mesh_terms: D000391:Air Microbiology; D001419:Bacteria / Q000302:isolation & purification*; D001483:Base Sequence; D003013:Clostridium / Q000302:isolation & purification*; D003090:Coliphages / Q000302:isolation & purification; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D006862:Hydrogen Sulfide; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000379:methods; D012722:Sewage; D013781:Texas
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012722:Sewage; D006862:Hydrogen Sulfide