Contemporary genetic structure and postglacial demographic history of the black scorpionfish, Scorpaena porcus, in the Mediterranean and the Black Seas.

Understanding the distribution of genetic diversity in the light of past demographic events linked with climatic shifts will help to forecast evolutionary trajectories of ecosystems within the current context of climate change. In this study, mitochondrial sequences and microsatellite loci were analysed using traditional population genetic approaches together with Bayesian dating and the more recent approximate Bayesian computation scenario testing. The genetic structure and demographic history of a commercial fish, the black scorpionfish, Scorpaena porcus, was investigated throughout the Mediterranean and Black Seas. The results suggest that the species recently underwent population expansions, in both seas, likely concomitant with the warming period following the Last Glacial Maximum, 20 000 years ago. A weak contemporaneous genetic differentiation was identified between the Black Sea and the Mediterranean Sea. However, the genetic diversity was similar for populations of the two seas, suggesting a high number of colonizers entered the Black Sea during the interglacial period and/or the presence of a refugial population in the Black Sea during the glacial period. Finally, within seas, an east/west genetic differentiation in the Adriatic seems to prevail, whereas the Black Sea does not show any structured spatial genetic pattern of its population. Overall, these results suggest that the Black Sea is not that isolated from the Mediterranean, and both seas revealed similar evolutionary patterns related to climate change and changes in sea level.

Escorbuto: una entidad que aún existe en la medicina moderna / Scurvy still exists in modern medicine

El escorbuto es un trastorno nutricional secundario al déficit corporal de vitamina C. Comunicamos el caso de un paciente de 37 años que consulta por lumbalgia e impotencia funcional de ambos miembros inferiores asociadas ahemorragias mucocutáneas. Destacamos que es su antecedente personal de déficit de vitamina C en la ingesta lo que, sumado a las características lesiones cutáneas, permite diagnosticar la enfermedad (AU)

Scurvy is a nutritional disorder due to vitamin C deficiency.We communicate the case of a 37-year-old patient who came to us with lumbar pain and lower limbs disability, asuell as, mucosa and cutaneous hemorrhages.We remark that dietary history leads to a rapid diagnosis when characteristic cutaneous lesions are present (AU)

Development of cutaneous sarcoidosis in a patient with chronic hepatitis C treated with interferon alpha 2b.

BACKGROUND: Sarcoidosis is a multisystemic granulomatous disorder of unknown etiology that most commonly affects young adults. A probable induction of sarcoidosis by interferons (IFN) has been published. To this date, few cases of cutaneous sarcoidosis inpatients with chronic hepatitis C under interferon treatment have been reported. OBJECTIVE: We describe a 50-year-old woman with chronic hepatitis C who developed lesions of cutaneous sarcoidosis three months after IFN treatment. CONCLUSIONS: The possible role of INF therapy in the development of cutaneous sarcoidosis in a patient with chronic hepatitis C should be considered.

Head louse infestations: epidemiologic survey and treatment evaluation in Argentinian schoolchildren.

BACKGROUND: Our aim was to demonstrate that the treatment of individual cases is effective, but not sufficient, to control endemic Pediculus capitis, and that eradication of the epidemiologic school focus may lower significantly the prevalence of infestation. Statistical data on the degree of infestation relating to socio-economic and cultural variables were also updated. Therapeutic effects and educational impact were evaluated. METHODS: An educational and motivational program was designed for pupils, parents, and teachers: 326 children and 15 adults were subjected to clinical and parasitologic evaluation. The recorded parameters included the age, sex, hair style and length, presence of other dermatologic diseases, degree of infestation, clinical remission, parasitologic remission, dwelling type and features, need to share a bed with co-dwellers, availability of home tap water supply, level of family income, and periodic medical controls. The entire population received treatment with neutral shampoo and rinsing cream containing 1% permethrin. Exclusion criteria were the presence of acute scalp inflammation and a history of pyrethrin and/or pyrethroid sensitivity. Statistical analysis was performed as required on data expressed as frequencies, percentages, means, and standard deviations by chi-square and Fisher exact tests. RESULTS: The overall infestation prevalence rate was 81.5%, the highest values corresponding to children from 6 to 11 years of age, with a slight predominance in males (55.4% vs. 44.6%). A significantly greater rate of clinical remission was observed in subjects enjoying home tap water supplies (p < 0.01). CONCLUSIONS: The model of research plus action adopted allows the following conclusions to be drawn: (i) individual and isolated treatments for pediculosis are useful, but will not by themselves allow for the epidemiologic control of this parasitosis; (ii) massive, complete, and simultaneous treatments lead to a significant decrease in infestation prevalence; (iii) educational measures tending to foster collective awareness enable greater epidemiologic surveillance to be achieved; (iv) careful inspection of the entire scalp is essential with the use of a powerful light source and lenses with high magnification, as the parasite has no predilection for any given area; (iv) socio-economic and cultural conditions are not relevant for infestation, although a good home tap water supply is essential for treatment.

Hepatitis C virus antibody (anti-HCV): prevalence in psoriasis.

BACKGROUND: In cases of psoriasis (PS), the etiology of the underlying liver disease is occasionally unknown. To investigate antibodies to hepatitis C virus (anti-HCV), their prevalence and clinical significance, 118 unselected outpatients with PS were studied prospectively. METHODS: Anti-HCV was assayed in serum by second-generation enzyme-linked immunosorbent assay (ELISA), considering a serum anti-HCV (+), when the optical density ratio was equal to or greater than three times the cut-off value, in duplicate determinations, whereas anti-HBc, anti-HBs, HBsAg, anti-HBe, and HBeAg were also evaluated by ELISA, as were the transaminases. As controls we took the 1.2% anti-HCV prevalence found in 60,000 blood donors from Buenos Aires city. RESULTS: Nine of 118 serum samples (7.6%) proved to be anti-HCV (+) (P < 0.001). There were no differences between positive and negative cases as regards gender, age, history of hepatitis, transfusions, or parenteral exposure, disease duration, or psoriasis type, and prior treatment with methotrexate and etretinate. Fifteen percent (17/113) were anti-HBc (+), 64.7% anti-HBs (+) (11/17) and 2.5% HBsAg (+) (3/17), whereas 3/17 (2.5%) showed isolated anti-HBc positivity. Liver biopsies in six anti-HCV patients disclosed four with chronic active hepatitis, one with cirrhosis, and one with steatosis. CONCLUSIONS: In the presence of liver disease in PS patients, an HCV infection should be considered as an alternative diagnosis. The high anti-HCV prevalence in this series is attributable to infection by inapparent parenteral routes, through minute skin abrasions, as reported for hepatitis B virus in PS.

[Hepatic function and oral ovulostatic drugs].

PIP: Hepatic side effects of a combined oral contraceptive (norethinodrel 4.925 mg and mestranol .075) were studied in 18 women aged 24-41 years. Blood cholesterol values, although remaining within normal limits, tended to diminish, apparently confirming the hypocholesteremic effect noted by other authors. Total serum protein, albumin, alpha-, beta-, and gamma-globulins, serum bilirubin, serum glutamic oxalacetic transaminase and serum glutamic pyruvic transaminase were essentially unchanged after 3 and 6 months of treatment. Thus, hepatic damage can be ruled out in the small group treated. On the basis of other reports, however, oral contraceptive use by women with a history of liver disease or of jaundice or pruritus during pregnancy is not recommended.^ieng