title: New high-toxicity mosquitocidal strains of Bacillus sphaericus lacking a 100-kilodalton-toxin gene.
abstract: Five new high-toxicity mosquitocidal strains of Bacillus sphaericus were isolated in Singapore. They all belong to phage group 8 and have binary toxin (51.4- plus 41.9-kDa) genes located on the chromosome but lack a 100-kDa-toxin gene. These strains of B. sphaericus constitute a new subgroup, as only two weakly toxic strains in phage group 8 have previously been described and all the known high-toxicity strains have both binary toxin and 100-kDa-toxin genes.
authors.affiliation: Institute of Molecular and Cell Biology, National University of Singapore.
authors.forename: J W
authors.initials: JW
authors.lastname: Liu
authors.forename: J
authors.initials: J
authors.lastname: Hindley
authors.forename: A G
authors.initials: AG
authors.lastname: Porter
authors.forename: F G
authors.initials: FG
authors.lastname: Priest
mesh_terms: D000818:Animals; D001407:Bacillus / Q000235:genetics* / Q000302:isolation & purification; D001427:Bacterial Toxins / Q000235:genetics; D009033:Culicidae; D004269:DNA, Bacterial / Q000235:genetics; D005798:Genes, Bacterial; D010572:Pest Control, Biological / Q000379:methods*; D012846:Singapore
chemical_list: D001427:Bacterial Toxins; D004269:DNA, Bacterial