01503     2200193   4500001002100000005001500021035002000036007000300056008003900059082001400098084001400112100001400126245011800140260008900258300000600347650001900353700002400372520091300396INLIS00000000001899120240906010817  a0010-0924000070ta240906                |          | |    aARTVET807  aARTVET8070 aSOERIPTO*1 aTHE VIRULENCE OF 4 TS-MUTANTS AND 80083L OF MYCOPLASAIA GALLISEPTICUM STRAINS IN 2 WEEK-OLD CHICKENS /cSOERIPTO*  aBalai Penelitian Veteriner :bProsiding Temu Ilmiah Nasional Bidang Veteriner,c1996  a7 4aVIRULENCE OF 40 aK. G. WITHEAR* *  *  aThe aim of this study is to determine the virulence of four is-mutants of Mycoplasma gallisepncum strains in 2 week-old
chickens. Groups of five 2 week-old SPF CSIRO Hybrid White Leghorn chickens were inoculated intraabdominally either with 0.2
ml of MG cultures of 80083 Is-3, 80083 Is-11, 80083 Is-15, 80083 1s-21 or 80083L strains. The sixth group was inoculated with
mycoplasma broth and used as controls. All the chickens were killed 2 weeks after inoculation and examined for air sac lesions and
antibody responses. The results showed that chickens inoculated with ts-mutants or 80083L had air sac lesions except with ts-I I
mutant. The control and inoculated chickens with 80083 ts-3 or 80083 t1-11 had no antibody responses, whereas chickens inoculated
with 80083 Is•15, 80083 ts-21 or 80083L had antibody responses. It is concluded that Is-11 mutant is not virulence in 2 week-old
chickens.