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Biomedical subjects

I Phillips

Publications and source records attributed to I Phillips.

369 records · Page 21Linked to original sources
PubMedDate not supplied

New methods for identification of obligate anaerobes.

Anaerobes are identified in the clinical laboratory to provide a microbiologic diagnosis for the individual patient as well as information on pathogenicity and epidemiology. The level of identification required in each context should be discussed and agreement should be reached. New methods of identification available, or likely to become available, include nucleic acid and immunologic probes, protein electrophoresis, peptidoglycan analysis, detection of volatile metabolic products, and detection of enzymes. The last of these has been widely adopted for the production of commercially available identification kits. All the methods require critical assessment before they are introduced into routine service.

Bacteria, Anaerobic↗
PubMedDate not supplied

gamma-Vinyl GABA in endopiriform area suppresses kindled amygdala seizures.

Suppression of kindled amygdala seizures in rats followed bilateral infusion of the GABA transaminase inhibitor gamma-vinyl-GABA (GVG) into the endopiriform area of the forebrain. The deep prepiriform cortex of the rat is an important site for both initiation and arrest of generalized seizures induced by systemic convulsants. To determine whether this area also regulates the spread of amygdala seizures, the irreversible GABA-transaminase blocking agent, GVG (vigabatrin) was infused bilaterally in the deep prepiriform area in amygdala-kindled rats. Twenty-four hours after the infusion, kindled seizure threshold was elevated in 12 of 13 rats tested. If homologous areas exist in the primate brain, treatment strategies that take advantage of critical areas for seizure spread by local infusion of inhibitory agents or transplantation of GABA-containing cells may be developed for suppressing intractable seizures in humans.

Aminocaproates↗
PubMedDate not supplied

Cerebral transplants for seizures: preliminary results.

Several critical brain regions have been identified in which application of gamma-aminobutyric acid (GABA) potentiating agents in small quantities can suppress or prevent generalized and kindled amygdala seizures, i.e., substantia nigra and deep prepiriform cortex. Severity of audiogenic seizures in the genetically epilepsy prone rat (GEPR) is reduced by injection of norepinephrine (NE) into the lateral ventricles and by GABA in inferior colliculus. The present investigation examines the potential for raising epileptic thresholds by increasing local GABAergic or NE inhibitory activity by means of brain transplants of tissue rich in GABA or NE neurons. Two models of epilepsy were used: amygdala-kindled seizures and sound-induced seizures in GEPRs. Transplantation of embryonic cerebellar or cortical tissue to the deep prepiriform area of amygdala kindled rats transiently raised seizure thresholds in three of the nine animals. Transplantation of embryonic cerebellar or cortical tissue to the inferior colliculus or adrenal medulla tissue to lateral ventricles of GEPRs did not appreciably reduce the intensity of audiogenic seizures in these animals.

Amygdala↗
PubMedDate not supplied

Pancreatic exocrine insufficiency and type 1 diabetes mellitus.

Studies in adults suggest that some patients with type 1 diabetes mellitus have pancreatic exocrine insufficiency (PEI). The primary aim of this study was to explore the association between pancreatic exocrine function and type 1 diabetes in young people under 17 years. The secondary aim was to evaluate the relationship between PEI in patients with diabetes, their clinical symptoms and blood glucose control. The importance of providing a highly trained multidisciplinary support network are also discussed.

Adolescent↗
PubMedDate not supplied

[Prevalence of serological markers of viral hepatitis A, B and delta in apparently healthy schoolchildren of Huanta, Peru].

UNLABELLED: Huanta is an Andean valley of Peru, located at 2400 meters above sea level with a population of 45,000 inhabitants. Viral hepatitis is widely known in the area due to its severe clinical symptoms and high morbidity and mortality. METHODS: A study on the prevalence of hepatitis A, B and D markers among 143 clinically healthy school students was carried out. The students were selected randomly from 4 schools in the city. The subjects provided epidemiological data regarding viral hepatitis and a venous blood sample to determine HBsAg, anti HBc antibody, anti-HBc IgM, anti HAV and anti HDV by the ELISA technique (Abbott Lab.). RESULTS: A total of 93 males and 50 females participated in the study. The mean age was 13.2 years (7-20 y.). Anti HAV was detected in 140 of them (98%). Prior infection by HBV was detected in 117 (82%) and an active infection in 4 of them (2.7%). The rate of HBsAg carriers was 16.0% (23). HDV infection was found in 21 of 117 (17.9%) individuals infected by the HBV. HBV infection and the previous use of injections represented a significant association (OR:3.7 IC 1.3-11, p < 0.012). No differences in sex were noted. CONCLUSION: A high prevalence of HAV, HBV, and HDV was found among school students in Huanta and this was the first report of hepatitis delta in the area. The association of HBV infection and the use of injections was meaningful. The high prevalence of HBV and HDV suggests the existence of a relationship to the morbidity and mortality by hepatitis in Huanta, thus the need for control programs by means of immunization against HBV.

Adolescent↗