[Bacteriologic studies of the amniotic fluid following amniocentesis].

After transabdominal amniocentesis puncture needles and samples of amniotic fluid were microbiologically examined. The antibacterial activity of the amniotic fluid after inoculation of different germs was compared. Positive microbiological results were found in 43 of total 573 puncture needles, but there were germs of the skin flora in 40 cases. Five amniotic fluid samples out of total 424 were contaminated, whereby skin commensals were detected in four samples. The bacteriostatic activity against the examined germs was individually. Complete growth inhibition over 24 hours was observed in cultures with coagulase-negative Staphylococcus, Staph. aureus and E. coli, a less growth inhibition over nearly 10 hours for Pseudomonas aeruginosa. The growth of Strep. faecalis was not suppressed. As result of the frequent observation of skin commensals in amniocentesis puncture needles and amniotic fluid samples clear lines for the performance of the amniocentesis on antiseptic condition basis and for the diagnostic and therapeutic procedure in case of positive microbiological findings were recommended.