<prompt> In pontaic fever, which antigen is seen in urine-Group specific antigen of Legionella serogroup- 1 LP 1Group specific antigen of L egionella serogroup- 1. LP 2Group specific antigen of Legionella serogroup- 4 LP 4Group specific antigen of Legionella serogroup- 6 LP 6  <response>: Ans. is a i.e., Group specific antigen of Legionella serogroup-1 LP1 o The examination of urine for legionella antigen by ELISA is a rapid and specific method for identifying L pneumophila,o However, disadvantage of urine antigen test is that it only detects Legionella pneumophila serogroup 1 LP-1 and negative urinary antigen test does not exclude infection with Iegionellae other than L pneumophila serogroup-1.o Only culture can detect non-LPl strains strains other than serogroup-1. 