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Biomedical subjects

Ronni Wolf

Publications and source records attributed to Ronni Wolf.

83 records · Page 5Linked to original sources
PubMedDate not supplied

The myth of black henna.

A 44-year-old woman presented with an eczematous, oozing eruption on her head, the back of her neck, and ears (Figure) that appeared one day after she had used a henna dye on her hair. She was aware of her allergy to permanent hair dyes, but her dermatologist approved of her use of natural dyes, such as henna. The dermatitis resolved within 1 week after she received an injection of combined betamethasone dipropionate 5 mg and betamethasone sodium phosphate 2 mg (Diprospan; Schering-Plough, Kenilworth, NJ).

Adult↗
PubMedDate not supplied

The Blue Peel: how to do it less expensively and faster.

One well accepted and popular method worldwide for trichloroacetic acid peels is the Obagi Blue Peel technique (Obagi Medical Products, Long Beach, CA). The peel solution is prepared by mixing a fixed volume of 30% trichloroacetic acid with the commercially available Blue Peel base. The authors suggest modifications for performing the peeling faster and less expensively: 1) preparing a larger volume of peel solution from each tube of Blue Peel base; 2) using higher concentrations of peel solution to reduce the number of coats necessary for reaching the desired depth of peel; and 3) storing the solution, as there is no need to adhere to the manufacturer's instructions to prepare the solution immediately before conducting the peel procedure to ensure homogeneity of the solution. The prepared solution can be stored at least 1 year.

Caustics↗
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Quinine sulfate inhibits invasion of Salmonella typhimurium and Shigella flexneri: a preliminary study.

BACKGROUND: The incidence of typhoid fever and shigellosis parallels that of malaria, so many individuals who are on antimalarial drugs can be found in areas where these diseases are widespread. We investigated the effect of quinine sulfate on the growth and invasion of Salmonella typhimurium and Shigella flexneri M90T to determine whether people on antimalarials can have secondary gain from some protection against typhoid fever and shigellosis. METHODS: The effect of 50 and 100 microM quinine sulfate on the invasive ability of Salmonella typhimurium and Shigella flexneri M90T into human colon adenocarcinoma-2 (Caco-2) cells was studied during the infection period. The invasive efficiency was expressed as the number of viable internalized bacteria by counting the colony-forming units. RESULTS: The invasive ability of Salmonella typhimurium and Shigella flexneri M90T was significantly inhibited by 50 and 100 microM quinine sulfate in a dose-dependent manner (for Salmonella typhimurium) when the drug was added to Caco-2 cell monolayers during the infection period. CONCLUSIONS: Since so many people who are on antimalarial drugs visit and inhabit areas that are endemic to typhoid fever and Shigella infection, a study on the influence of these drugs on the disease is long overdue. Our data indicate that quinine sulfate interferes with the invasion and internalization of Salmonella typhimurium and Shigella flexneri M90T into host cells. Further studies on additional strains/serotypes with other newer antimalarials at various concentrations are needed to verify this effect of quinine sulfate and to draw conclusions on its significance in vivo.

Antimalarials↗