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A D Seth

Publications and source records attributed to A D Seth.

11 recordsLinked to original sources
PubMed1981

A survey of beta-lactamase-producing gonococcal isolates reported in the United Kingdom 1979--80. The present trend.

104 strains of penicillinase-producing Neisseria gonorrhoeae (P.P.N.G) from England, Scotland, and Wales were reported to the V.D. Reference Laboratory and the Communicable Disease Centre, Colindale, in 1979. By contrast, there were only 15 reported cases in 1977 and 31 in 1978. The majority of patients each year contracted their infections overseas, primarily in South-East Asia and West Africa, but in 1979 41 patients (39%) reported contracting their infections in the United Kingdom. Of these 17 were secondary contacts of patients who had acquired their infection outside the U.K., but in 8 cases the primary contact was in the United Kingdom. The current incidence of P.P.N.G. in the U.K. is low compared with that in Singapore and the Philippines, but continued epidemiological assessment is essential because not all laboratories use this reference reporting system. The number of P.P.N.G. strains reported up to October, 1980, shows a considerable increase over those seen during 1979.

Adolescent↗
PubMed1981

Sensitivity of gonococci to rosoxacin compared with that of penicillin, cefuroxime and tetracycline.

The in vitro activity of rosoxacin, a pyridyl quinolone derivative against Neisseria gonorrhoeae is compared with that of penicillin, cefuroxime and tetracycline. Three groups of gonococci comprising of beta-lactamase-positive and negative strains and gonococci with high penicillin MICs are studied. Rosoxacin was the most active against the entire spectrum of gonococci tested in vitro and its activity is not affected by the production of beta-lactamase by some gonococci.

4-Quinolones↗
PubMed1980

Sensitivity to penicillin of gonococci in different racial groups.

The distribution of the sensitivity to penicillin of gonococci isolated from 631 men and 290 women was analysed in relation to the racial origin of the patients and the type of source contact alleged by the men. No difference in the sensitivity patterns was found between strains from white patients from the United Kingdom and those from immigrants from the Caribbean area. Asian men harboured significantly more insensitive strains than men of other racial groups. Men of Caribbean stock who had been born in this country had significantly more infections due to fully sensitive strains. The reasons for these variations are not known, but one contributory factor may be differences within the racial groups in the proportions of infections contracted from prostitutes.

Ethnicity↗
PubMed1979

Sensitivity of Neisseria gonorrhoeae to antibiotics in London (1976-78).

Three surveys of the sensitivity of pretreatment isolates of gonococci to penicillin, ampicillin, tetracycline, spectinomycin, streptomycin, and co-trimoxazole were carried out during the period 1976-78. Compared with the results of previous surveys in the London area the decline in the proportion of strains of gonococci which are insensitive to penicillin appears to have halted. No changes were found in the levels of resistance to ampicillin, tetracycline, or spectinomycin during the period surveyed, although there was a slight increase in the proportion of strains requiring concentrations of 20 microgram spectinomycin per ml for inhibition. Streptomycin resistance has decreased considerably and 91% of strains are now sensitive to 10 microgram streptomycin per ml.

Ampicillin↗
PubMed1978

Talampicillin and probenecid compared with ampicillin and probenecid for the treatment of gonococcal urethritis in men.

Two hundred and ten men suffering from uncomplicated gonococcal urethritis were treated with one of two treatment schedules. Of 109 patients treated with 3 g ampicillin and 2 g probenecid (group A) there were two recurrences in the first week after treatment and none in the second week. Of 101 patients treated with 1.5 g talampicillin and 2 g probenecid (group B), there were three recurrences in the first week and none in the second week. Both antibiotics were well tolerated, but one patient vomited two hours after taking talampicillin. The sensitivity pattern of Neisseria gonorrhoeae to penicillin at The London Hospital has shown an increase in the proportion of more sensitive strains during the last three years. Talampicillin given in a single dose with probenecid is satisfactory in the treatment of acute gonococcal urethritis but, apart from the smaller dosage, it does not offer any advantage over ampicillin with probenecid.

Adolescent↗
PubMed1976

A comparison of brain heart infusion blood agar sterilized by filtration and heat on the growth of Neisseria gonorrhoeae.

The growth of Neisseria gonorrhoeae on brain heart infusion blood agar in which the base was sterilized by filtration has been compared with growth on the same medium sterilized by heat. Colonies were larger on the unheated medium, and autoclaving at 115 degrees C of 121 degrees C for 15 minutes was accompanied by a progressive decrease in colony size. Viable counts on the three media showed no difference in end points. Colonies on the unheated medium were usually large enough to be easily recognizable after overnight incubation.

Agar↗
PubMed1975

Ampicillin plus probenecid compared with procaine penicillin plus probenecid in the treatment of gonorrhoea.

396 male patients with gonococcal urethritis were treated by one of three treatment schedules. Of 132 patients treated with 2.4 m.u. procaine penicillin plus 2 g. probenecid, 109 were followed. There were three (2.8 per cent) recurrences in the first week and none in the second. Of 132 patients treated with 2 g. ampicillin plus 2 g. probenecid, 112 were followed. There were four (3.6 per cent.) recurrences in the first week and three (2.6 per cent.) in the second (total of 6.2 per cent.). Of 132 patients treated with 3 g. ampicillin plus 2 g. probenecid, 115 were followed. There was one (0.8 per cent.) recurrence in the first week and five (4.4 per cent.) in the second (total of 5.2 per cent.). A close correlation was found between the sensitivities of gonococcal strains to ampicillin and to penicillin. The overall sensitivity pattern of N. gonorrhoeae to penicillin had not changed at The London Hospital since the last report in 1972, but there was further evidence of cross-resistance between penicillin and cotrimoxazole.

Adolescent↗