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Biomedical subjects

C Gisbert

Publications and source records attributed to C Gisbert.

10 recordsLinked to original sources
PubMed2000

Outbreak of typhoid fever on the French Riviera.

A case-control study was conducted to establish the source of a community outbreak of typhoid fever in Utelle, France, a village located in the Alpes-Maritimes district of the French Riviera. Thirteen confirmed cases of typhoid fever and 41 confirmed community controls were included in the study. Cases and controls did not differ regarding ingestion of water. Multivariate logistic regression analysis identified consumption of pork meats during a village festival as the only statistically significant risk factor for typhoid fever after adjusting for age and sex (odds ratio, 76.0; 95% confidence interval, 3.5-1660). Assessment of food-handling procedures at the inn where the food had been prepared showed that the refrigeration and cooking facilities were inadequate to maintain a proper sanitary environment during the preparation of a meal for 350 people. Although the exact cause of the epidemic could not be confirmed, food contaminated by a chronic typhi carrier is the most plausible hypothesis.

Animals↗
PubMed2000

The yeast HAL1 gene improves salt tolerance of transgenic tomato.

Overexpression of the HAL1 gene in yeast has a positive effect on salt tolerance by maintaining a high internal K(+) concentration and decreasing intracellular Na(+) during salt stress. In the present work, the yeast gene HAL1 was introduced into tomato (Lycopersicon esculentum Mill.) by Agrobacterium tumefaciens-mediated transformation. A sample of primary transformants was self-pollinated, and progeny from both transformed and non-transformed plants (controls) were evaluated for salt tolerance in vitro and in vivo. Results from different tests indicated a higher level of salt tolerance in the progeny of two different transgenic plants bearing four copies or one copy of the HAL1 gene. In addition, measurement of the intracellular K(+) to Na(+) ratios showed that transgenic lines were able to retain more K(+) than the control under salt stress. Although plants and yeast cannot be compared in an absolute sense, these results indicate that the mechanism controlling the positive effect of the HAL1 gene on salt tolerance may be similar in transgenic plants and yeast.

Adaptation, Physiological↗
PubMed1997

Hyperlipidemia in liver transplant recipients: prevalence and risk factors.

Hyperlipidemia is common in transplant patients. Although a causal relationship to the use of cyclosporine is accepted, additional risk factors are as yet unidentified. Eighty-five liver transplant recipients treated with standard triple immunosuppression with a survival of at least 6 months were evaluated. Pretransplantation and posttransplantation variables were analyzed as predictive factors of posttransplantation hyperlipidemia. Serum cholesterol and triglyceride levels were considered elevated if they were > 250 mg/dL and > 150 mg/dL, respectively. Before and after transplantation, hyperlipidemia occurred in 8% (95% confidence interval [CI], 3% to 16%) and 66% (95% CI, 55% to 76%), respectively. After transplantation, 47% (95% CI, 36% to 58%) of the patients had isolated high triglyceride levels, 12% (95% CI, 6% to 21%) had both elevated cholesterol and triglyceride levels, and 7% (95% CI, 3% to 15%) had isolated elevated cholesterol levels. Hypertriglyceridemia occurred early after transplantation (67% by first month) and persisted nearly unchanged throughout the first year. In contrast, cholesterol levels increased with time (5%, 13%, and 27% at 1, 3, and 6 months, respectively). In univariate analysis, factors predictive of hypercholesterolemia included female sex, pretransplantation cholestatic liver disease, pretransplantation cholesterol levels > 141 mg/dL, and > 3 methylprednisolone "boluses." In multivariate analysis, only a pretransplantation cholesterol level of > 141 mg/dL (odds ratio [OR], 5.5; 95% CI, 1.4 to 21) was an independent risk factor. Risk factors associated with hypertriglyceridemia included pretransplantation hepatocellular liver disease (OR, 6.8; 95% CI, 1.2 to 40) and posttransplantation renal dysfunction (OR, 5.4; 95% CI, 1.9 to 15.4). Hyperlipidemia is a frequent finding in liver transplant recipients, and hypertriglyceridemia is the most common abnormality. Hypertriglyceridemia can be predicted on the basis of pretransplant hepatocellular disease and posttransplant renal dysfunction. Pretransplant serum cholesterol level is an independent risk factor for posttransplant hypercholesterolemia.

Adult↗
PubMed1997

Persistent cortical blindness after cyclosporine leukoencephalopathy.

Cyclosporine A (CyA)-related cortical blindness is an uncommon complication of CyA therapy in patients undergoing liver transplantation. Characteristically, neurological symptoms associated with CyA treatment usually regress after cyclosporine withdrawal. We present a case of a liver transplant recipient in whom discontinuation of CyA therapy has resulted in only partial clinical improvement, and cortical blindness remains after 1 year of follow-up. The evolution of cerebral magnetic resonance imaging (MRI) findings over time in this form of CyA leukoencephalopathy is also described.

Blindness, Cortical↗
PubMed1996

[Droxicam-induced toxic hepatitis].

We present four cases of hepatitis with clinical features indicating a direct link with Droxicam. In all the cases, the presentation was that of acute hepatitis with subsequent resolution, whereas one patient developed autoimmune chronic active hepatitis. A full evaluation including ultrasound, liver biopsy, and serologic markers supported the diagnosis. Due to the fact that the "Dirección General de Farmacia y Productos Sanitarios" has approved the postponement of dispensation of products with Droxicam from February 25, 1995, this drug should not be considered anymore in the future as a potential cause of liver injury (acute or chronic hepatitis).

Adult↗
PubMed1995

[Prevalence and clinical significance of autoantibodies in chronic hepatitis C treated with interferon alfa].

Autoantibodies against non organ-specific may be induced by IFN treatment in HCV liver chronic disease. In order to assess this issue and its clinical significance, 44 patients with chronic hepatitis C (anti HCV and RNA-HCV +) treated with IFN were evaluated. In 13 patients (29.5%) the following autoantibodies were detected during the treatment: AAML (5), AAN (9), ALK-M (4). Only in the A-LKM + patients there was a slight increase in aminotransferases with a reappearance of the viremia. Moreover 2 of these patients showed a flare of their liver disease without systemic findings. During the follow up (28) months one of the patients normalized the aminotransferases with clearance of serum HCV RNA. There were no statistical differences in the sustained response rate between patients with (2/13) or without (4/31) autoantibodies. The development of AAN, AAML and ALKM at low titer during IFN treatment in CH-C is without clinical relevance. However, ALKM detection is occasionally associated with the "breakthrough" phenomenon with HCV eradication, suggesting an immuno-modulatory activity of IFN.

Autoantibodies↗
PubMed1995

Does the healthy hepatitis C virus carrier state really exist? An analysis using polymerase chain reaction.

To determine whether the presence of hepatitis C virus (HCV) viremia correlates with the severity of liver disease in anti-HCV-positive apparently healthy blood donors, we studied 98 blood donors found positive for anti-HCV using enzyme-linked immunosorbent assay (ELISA). Each subject underwent a liver biopsy, a test for HCV RNA in the serum by polymerase chain reaction (PCR), and a panel of liver injury tests. As a result, 97% of the anti-HCV-positive blood donors had some type of histological abnormality:22 (22%) had minimal changes, 1 (1%) had chronic lobular hepatitis, 40 (41%) had chronic persistent hepatitis (CPH), and 32 (33%) had chronic active hepatitis (CAH). Only 3 subjects had a normal liver histology. HCV RNA was detectable in the serum in 65% of the anti-HCV-positive donors. HCV RNA in serum was detectable in none of the donors with a normal liver histology, in 36% (confidence interval [CI], 17% to 59%) of those with minimal changes, in 70% (CI, 53% to 83%) of those with CPH, and in 87% (CI, 71% to 96%) of those with CAH (P = .00001). HCV RNA was detectable in 75% of the donors with elevated (> 45 U/L) alanine transaminase (ALT) values and in 59% of those with normal ALT levels (P = not significant). The incidence of chronic hepatitis was higher in HCV RNA-positive than in HCV RNA-negative donors (88% vs. 50%; P = .00005).(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1985

Treatment of lichen planus with griseofulvin. Report of seven cases.

Seven patients with lichen planus of the oral mucosa (four with erosive and three with reticular types of the disease) were studied; they were treated with 500 mg of griseofulvin twice daily for 2 1/2 months. In no case was improvement observed; on the contrary, in four patients (two with erosive and two with reticular forms) the condition worsened.

Adult↗