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R Delgadillo

Publications and source records attributed to R Delgadillo.

8 recordsLinked to original sources

Characterization and assembly of poliovirus-related 45 S particles.

Using detergents, 45 S particles could be extracted from poliovirus-infected Vero and human embryonic kidney monolayer cells, but not from HeLa suspension cells. They were composed of the capsid proteins VP0, VP1, and VP3, devoid of RNA, and extremely sensitive to heat or to a slightly alkaline pH. The 45 S particles possessed neutralization epitopes of the N1 and N2 classes, as well as a VP3-linked epitope. The N2 epitopes were lost upon denaturation. In the presence of cell extracts 45 S particles were, like 14 S subunits, assembled to 71 S empty capsids expressing the N1 and N2 epitopes.

Animals↗

Treatment of gonorrhoea in males in the Central African Republic with spectinomycin and procaine penicillin.

Gonorrhoea has become a problem in most parts of the world, and valid recommendations for treatment are important for control of the disease. In this study in Bangui, Central African Republic, 460 male patients with gonorrhoea were randomly assigned to treatment with either 4.0 x 10(6) units of procaine penicillin plus 1 g of probenecid, or 2 g of spectinomycin. Of these patients, 91% returned for follow-up; the failure rate was 4.8% with the penicillin schedule and 6.2% with spectinomycin (difference not statistically significant). Concomitant Chlamydia trachomatis infection was found in 5% of patients, and almost all of this group developed postgonococcal urethritis.Of the 460 patients, 7 (1.5%) were infected with penicillinase-producing Neisseria gonorrhoeae (PPNG) strains. Penicillin treatment failed in these cases, while spectinomycin was highly efficacious. The failure rate for penicillin was considerably higher in infections with strains that were less sensitive to penicillin in vitro. The failure rate for spectinomycin treatment was higher in patients who were infected with a strain that was highly sensitive to penicillin.It is concluded that, once PPNG strains have been found in a country, treatment of gonorrhoea should be based on an antibiotic that cures PPNG infections. Tetracycline can be used as second-line treatment, since it will also cure C. trachomatis infection, which is much less frequently associated with gonorrhoea in Africa than in industrial countries.

Administration, Oral↗