en Biological Sciences Biological Sciences Original Research Original Research The rate of listeria abortion in Tehran was investigated. Abortion samples (200) were cold enriched at 4°C and subcultured on selective culture media containing acriflavin, nalidixic acid and potassium thiocyanate. Sera of patients were tested serologically (IF method) for screening, and results were confirmed by culturing the positive samples. Antibody against L. mollocytogelles was obtained in 70.7% of sera but the bacteria was isolated from five samples only. 1 4 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-298-598&slc_lang=en&sid=1 SAEED MIRDAMADI 20031947532846006082 20031947532846006082 Yes From The Biotechnology Department, Iranian Research Organization for Science & Technology (IROST), P.O. Box: 15815-3538 Tehran NASRIN MOAZAMI 20031947532846006083 20031947532846006083 No From The Biotechnology Department, Iranian Research Organization for Science & Technology (IROST), P.O. Box: 15815-3538 Tehran SHAHNAZ RAFIEE TEHRANI 20031947532846006084 20031947532846006084 No Immunology Department, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran.