Rapid in vitro replication of group B streptococcus in term human amniotic fluid

4-hour in vitro growth curves of a type III group B streptococcus (GBS) and Escherichia coli were examined in sterile term human amniotic fluid specimens. Both bacterial strains proliferated despite ratios of phosphate to elemental zinc in the range reportedly inhibitory for E. coli. After 4 h of incubation, despite comparable inocula, GBS numbers exceeded those of E. coli by 10-fold. The strikingly rapid growth of some GBS strains in amniotic fluid may represent yet another factor responsible for perinatal GBS infection of the human neonate.

A metronidazole-resistant strain of Trichomonas vaginalis and its sensitivity to Go 10213

In the present study the comparative in-vitro and in-vivo efficacy of Go 10213 was compared with those of metronidazole, secnidazole, tinidazole, ornidazole and nimorazole against a metronidazole-resistant strain of T. vaginalis. Go 10213 was found to be superior in activity. It appears more promising than the drugs mentioned above on the basis of the evidence presented.

Comparative studies on the amoebicidal activity of known 5-nitroimidazole derivatives and CG 10213-Go in golden hamsters, Mesocricetus auratus, infected in the liver or caecum or both with trophozoites of Entamoeba histolytica

CG 10213-Go, a 5-nitroimidazole derivative synthesized at the CIBA-Geigy Research Centre, Bombay, proved superior to such currently used 5-nitroimidazole derivatives as metronidazole, ornidazole, secnidazole, tinidazole and nimorazole, against experimental amoebic infections of the liver and caecum in a golden hamster model. CG 10213-Go is now undergoing clinical trials.

Central nervous system active 5-oxo-1,4,5,6,7,8-hexahydrocinnolines

Among a series of 5-oxo-1,4,5,6,7,8-hexahydrocinnolines examined for their CNS activity, 1-(2-diethylaminoethyl)-3-(p-fluorophenyl)-5-oxo-7,7-dimethyl-1,4,5,6,7,8-hexahydrocinnoline (23) and 1-(2-dimethylaminoethyl)-3-phenyl-5-oxo-7,7-dimethyl-1,4,5,6,7,8-hexahydrocinnoline (27) had sedative and anticonvulsant properties and were also acitve in tests used to characterize antidepressants. But their narrow safety margin precluded further follow-up studies. Derivatives 35-38 of 2-(omega-phenacyl)-3-hydrazino-5,5-dimethyl-2-cyclohexenone were active in tests used to characterize antidepressants and were weakly sedative but not anticonvulsant.