No abstract

SUMMARY Chlamydia trachomatis infection of the urogenital tract of women presumed to be non-promiscuous, and in presumably promiscuous women attending a Special Clinic in Manchester was studied. Two hundred female members of hospital staff, who formed the non-promiscuous group, were found to have a 1 % incidence of chlamydial infection. This compared with an incidence of 26 % among 200 women attending the clinic. Among the clinic patients, chlamydial infection was significantly linked with the presence of gonorrhoea, mixed infections, and other sexually transmissible diseases-such as, trichomoniasis. No correlation could be made between the incidence of chlamydial infection and the use of oral contraceptives.

No abstract

SUMMARYThree weeks after inoculation, cherry leaf roll virus and arabis mosaic virus were each detected in the apices of at least seven axillary buds above the inoculated leaves of Nieotiana rustica plants. Such infected apices were grown into young plants on Linsmaier and Skoog's (1965) medium, and their virus content tested after 14 to I35 days; 5 ° to 78 % were apparently free from cherry leaf roll virus and 69 % from arabis mosaic virus. In a more detailed test with cherry leaf roll virus, the proportion of virus-free plants increased from 50% after 16 days to IOO% after io8 days. Similar plants grown for 3o weeks remained free of symptoms and detectable virus.