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PubMedDate not supplied

[The formative years of a research scientist: Louis Pasteur].

The article endeavors to bring back to life Pasteur's years as a teenage boy, based on his correspondence with his parents and on the philosophy homework he undertook during his school days. These materials reveal an authoritarian, moralizing young man who bore the strong mark of his education and his father's personality but who was also endowed with a spirit of curiosity, already imbued with the rational faith that would characterize the entirety of his scientific works.

Correspondence as Topic↗
PubMed2006

[Diagnosis of malaria in Antananarivo City: examination of the results obtained at the Institut Pasteur de Madagascar from 2001 to 2004].

Malaria diagnosis is part of the daily activities of the Clinical Biology Center (CBC) of the Institut Pasteur de Madagascar in Antananarivo. Over a period of four years (2001-2004), regardless the methods being used, out of 6537 blood samples examined, 159 (2.43%) tests were positive. All four species of Plasmodium infecting human. were detected with a high prevalence of P. falciparum (87.2%). 49/159 patients were foreigners, but their files did not allow us to distinguish imported from locally acquired malaria cases. Also, among Malagasy patients, there was no possibility to recognize introduced malaria cases (contracted in coastal areas). In Madagascar malaria remains a public health problem. But fever and recent history of fever are often considered and treated as malaria. Our results demonstrated that confirmed malaria rate was very low. Reporting malaria on the basis of clinical signs overestimates malaria cases at the national level. The importance of malaria biological diagnosis is discussed in this article.

Humans↗
PubMed1991

[Deep mycoses observed in New Caledonia. Evaluation of observations from the laboratory of pathologic anatomy of the Pasteur Institute of New Caledonia 1975-1990].

All cases of deep mycotic diseases observed between 1975 and 1989 in the Laboratory of Anatomical Pathology at Nouméa's Pasteur Institute have been studied retrospectively together with all available data concerning this pathology both in New Caledonia and the Pacific area. During the period under review, two cases of histoplasmosis, 4 of actinomycosis, 3 sporotrichosis, 5 mycetoma and 5 chromoblastomycosis were recorded in New Caledonia. Clinical and histological data appear to be identical to those observed in other Pacific Islands. Diagnosis is most usually supported only by histological examination and, thus, for future studies it is vital that specific mycologic culture of all cases be carried out.

Actinomycosis↗
PubMed1976

Effect of pasteurization and heat treatment on bovine leukemia virus.

Four sheep inoculated with mixtures of bovine leukemia virus (BLV) and milk that was treated by a simulated high-temperature short-time pasteurization procedure did not become infected with BLV or develop tumor. Four sheep inoculated with unpasteurized BLV-mil mixtures became infected with BLV and 3 died with tumor at 15, 21, and 27 months, respectively, after inoculation. Fluid from a BLV-infected cell culture was heated to 56, 60, 65, and 73 C for 1/2 minute and 1 minute (in separate trials) and transferred to noninfected cells. Culture fluid heated to 60 C and higher did not infect the cells.

Animals↗
PubMed1977

[Chacterization of human reticulocytes: respiration, Pasteur effect, and electron microscopic findings on mitochondria].

On 5 blood samples of newborns, whose reticulocytes had been enriched by density gradient centrifugation, and on 25 blood samples of different reticulocytoses of man were determined: the extent of intra- and extramitochondrial respiration, coupling of the electron transfer with the oxidative phosphorylation and the electronmicroscopic appearance, and the number of mitochondria. The reticulocytes occurring in the flowing human blood are in general relatively stiff and are characterized by the following properties:--low respiration--low capacity of the respiratory chain enzymes--weakened Pasteur effect --varying proportion of intramitochondrial respiration and total respiration--decoupling of a major part of the intramitochondrial respiration--low number of mitochondria--qualitative changes of mitochondria. However, there are situations of erythropoiesis where immature reticulocytes are discharged in man (similar to the socalled "stress reticulocytes" of rabbits). On the other hand, it could be shown that the reticulocytes of rabbits are mature in the normal state.

Animals↗
PubMed1990

Preclinical characterization of a new pasteurized monoclonal antibody purified factor VIIIC.

The treatment of hemophilia A patients has progressed in the last 30 years. The development of more pure factor VIII concentrates has been encouraged by the appearance of the human immunodeficiency virus in blood supply. Monoclate was the first essentially pure form of factor VIII available for hemophilia therapy. The liquid pasteurized form of Monoclate represents a new standard for therapy that attempts to eliminate a broad spectrum of viral content in factor VIII preparations.

Antibodies, Monoclonal↗
PubMedDate not supplied

[Comparison of Merck and Pasteur plasma-derived hepatitis B vaccines in 2 populations of hemodialysis patients].

In reporting the preliminary data on the anti-B hepatitis vaccination study, the paper compares the two plasma-derived vaccines on the market, Pasteur Hevac-B and HB-Vax M.S.D. in two groups of hemodialyzed subjects. It briefly described the properties of the two vaccines and examines the respective vaccination protocols, doses and administration methods. After reporting the data on the two groups considered and the results in each one, the paper concludes that the M.S.D. vaccine is the most efficacious for hemodialyzed subjects.

Hepatitis B Surface Antigens↗
PubMed1989

[Evaluation of 30-year-activity of the Virology Laboratory of the Pasteur Institute in Madagascar (1958-1987)].

The authors studied the different activities of Pasteur Institute virology laboratory since it was created. In general virology laboratory, 1.685 viral strains were isolated from 9.533 studied samples (17.6% of positivity). Enterovirus represented 90% of the viral strains. From 2.417 taking of rhino-pharynx, 133 myxovirus were isolated: A/H3N2 represented 76% of them. 10.776 patients, from 36.169 antirabic department consultants, were vaccinated and 600 had an antirabic serotherapy. 2.828 suspect samples were analysed for the rabies diagnostic: 1.438 were positive (51%). The Institute produced 3.410 liters of Fermi human vaccine type.

Enterovirus↗
PubMed1988

Hexose metabolism in pancreatic islets: the Pasteur effect.

In rat pancreatic islets, hypoxia severely decreased both the oxidation of D-[U-14C]glucose and the release of insulin evoked by D-glucose. The production of [14C]lactate was increased in the hypoxic islets, the relative magnitude of such an increment being greater at low (2.8 mM) than high (8.3 and 16.7 mM) D-glucose concentrations. Hypoxia increased the detritiation of D-[5-3H]glucose at low glucose concentration (2.8 mM), failed to affect 3H2O production at an intermediate glucose level (8.3 mM), and inhibited the utilization of D-[5-3H]glucose at a higher hexose concentration (16.7 mM). In tumoral islet cells (RINm5F line) exposed to 16.7 mM D-glucose, hypoxia decreased D-[U-14C]glucose oxidation to the same extent as in normal islet cells, but increased the production of [14C]lactate and 3H2O to a greater extent than in normal islets. These findings indicate that the Pasteur effect is operative in islet cells. The experimental data also suggest that, under normal conditions of oxygenation, high concentrations of D-glucose lead to both activation of phosphofructokinase and stimulation of mitochondrial oxidative events in normal, but not tumoral, islet cells.

Adenoma, Islet Cell↗
PubMed1987

Virus safety of pasteurized factor VIII and factor IX concentrates: study in virgin patients.

In a long term surveillance study hemophilia A and B patients were treated with a Factor VIII HS and Factor IX HS concentrate respectively, both pasteurized by heating in solution: 10 hours at 60 degrees C. None of 31 virgin hemophiliacs treated with Factor VIII HS Behringwerke developed hepatitis B during a follow up between 6 to 60 months. One patient who received 379.280 IU Factor VIII by 977 applications showed a seroconversion after 961 days of treatment. Passive/active immunisation is suggested. 4 patients had moderate elevations of transaminases (less than 120 U/l) without clinical signs of liver disease. 2 patients suffered a non-icteric NA NB-hepatitis two months after synovectomy in the same hospital. 6 virgin hemophilia B patients who had been treated with Factor IX concentrate HS Behringwerke remained serologically negative and did not develop any symptoms indicative of a hepatic disease during a follow up between 11-29 months. The HTLV-III safety of Factor VIII HS and Factor IX HS Behringwerke is presently under investigation by determination of the corresponding antibody.

Adolescent↗
PubMed1987

Inactivation of HTLV-III/LAV, hepatitis B and non-A/non-B viruses by pasteurization in human plasma protein preparations.

Pasteurization (heat treatment at +60 degrees C for 10 hours in solution) during the production of human plasma protein preparations has proved useful 1. to inactivate a broad spectrum of viruses and 2. in combination with stabilizers to leave the nativity of the products unaffected. Their efficacy has been experimentally tested for HTLV-III/LAV, Hepatitis B and non-A/non-B viruses. The following preparations were tested: with HTLV-III/LAV: Factor VIII, Factor IX, AT III, AHC and PPSB; with Hepatitis B virus: Factor VIII, Factor XIII, AT III, PPSB and Fibrinogen; with Hepatitis non-A/non-B virus: Factor VIII and AT III.

Animals↗
PubMedDate not supplied

[Evaluation of the work conducted by the Madagascar Pasteur Institute in the study of human immunodeficiency virus (HIV) seropositivity in that country].

Since late 1985, the Institut Pasteur de Madagascar has studied the problem of the distribution of HIV in the island. With the approval and cooperation of the Malagasy Ministry of Health, a number of different surveys have been undertaken, particularly of those sections of the population diagnosed as being of "high-risk". In 1987, a Malagasy prostitute from the country's second largest port was identified as seropositive. One case of clinical AIDS was diagnosed in 1988 in a Franco-Malagasy subject living in NOSY BE. Systematic tests for seropositivity among women with multiple partners in nine "high-risk" areas of the country are applied. The aim of this survey during 1988 is to make such groups aware of the vital necessity of overcoming the problem by preventing its growth by taking appropriate measures. The IPM has obtained government approval and has established the facilities to confirm findings of seropositivity among the population of Madagascar.

AIDS Serodiagnosis↗
PubMedDate not supplied

[The rhabdovirus program at the Istituto Pasteur--Fondazione Cenci Bolognetti].

Studies carried out under the research program on Rhabdovirus sponsored by the Istituto Pasteur--Fondazione Cenci Bolognetti are reviewed. The program was mainly focused to investigate biologically relevant characteristics of this virus and to evaluate epidemiological and prophylactic aspects involved in sylvatic rabies control measures.

Animals↗
PubMed1987

[The hepatitis B vaccination campaign carried out from 1982 to 1984 using the Hevac B Pasteur vaccine among 6162 employees of Vaud hospitals].

6162 Swiss hospital employees were vaccinated against hepatitis B from 1982-1984 with Hevac B Pasteur vaccine. Vaccination was offered free of charge to 8471 employees, 72% of whom accepted a series of three injections and 50% a booster about 15 months later. Side effects, all benign, brief and rapidly resolved, were observed after 4% of injections in 7% of patients. Side effects after each of the three injections were noted in 0.7% of subjects. These figures are below those of other authors. -Concentrations of protective anti-HBs antibodies produced by the vaccination were measured by sampling of subjects. Four years after the beginning of the vaccinations the subjects had an average concentration of 87 mU/ml without booster and 595 mU/ml with booster. On average these concentrations are higher in employees more heavily exposed to hepatitis B than in the others. They are also higher in vaccines than in subjects immunized after natural infection, in whom they were 138 mU/ml. Production of anti-HBs antibodies was observed in 94% of subjects vaccinated.-In conclusion, the preparation used proved effective and well tolerated. This observation should help to foster more general use of vaccination campaigns in exposed populations.

Hepatitis B↗
PubMed1987

Virus safety of a pasteurized antithrombin III concentrate. Preclinical and clinical data.

Blood derived products carry the risk of virus transmission, especially for the hepatitis B virus (HBV), non-A/non-B virus(es) (NANBV) and human immunodeficiency virus (HIV). The precautionary measures for guaranteeing the virus safety of the pasteurized antithrombin III concentrate Kybernin HS/P are described and the efficacy of these measures is demonstrated by in vitro studies and by chimpanzee trials. The inactivation rate is greater than or equal to 10(6.7) for HIV, greater than or equal to 10(6.7) for HBV, and greater than or equal to 10(5.3) for NANBV (Hutchinson Pool). Clinically, virus safety was demonstrated by long-term drug surveillance as well as by both a retrospective and prospective clinical trial. The 13 participants of the prospective study were checked clinically and biochemically according to the standards of the International Committee of Thrombosis and Hemostasis (ICTH). Within an observation period of 12 months, no seroconversion has been detected for HIV or HBV. Neither have any increases in the transaminases occurred which would indicate NANB hepatitis.

Alanine Transaminase↗
PubMed1986

[Development and survival of Yersinia enterocolitica in pasteurized milk and ice cream].

Studied were the laboratory development and survival of Yersinia enterocolitica organisms in pasteurized milk and ice-cream that had been contaminated with varying amounts of microbial cells. The milk was kept at 4 degrees, 9 degrees, and 21 degrees C for 120 days, and the ice-cream--at--18 degrees and --23 degrees C for 8 months. Yersinia development and survival were found to be dependent on temperature as well as on the numbers and activity of microflora. When milk was kept at temperatures below 10 degrees C the organisms retained viability for more than 120 days, while at room temperature (20 degrees--22 degrees C) they remained active for up to 30-60 days. The presence of coliform bacteria inhibited the development of Yersinia, its replication and survival rates being reduced. These were dependent in ice-cream on the amount of viable cells in the initial raw material. When contamination was at 10-15 cells per cu. cm Yersinia organisms remained viable up to the 45th day, and at 100 cells per cu. cm--up to the 90th day. At 1000 cells/cu. cm and more viable cells could be found up to the eighth month, their count over a 6-month period being reduced from 84.2 up to 98.5 per cent.

Animals↗
PubMed1977

[Serodiagnosis of 2,438 cases of toxoplasmosis by immunofluorescence at the Pasteur Institute of Algeria. Epidemiological and clinical corollaries].

2 438 sera from patients suspected of having toxoplasmosis, were tested by indirect immunofluorescence at the Pasteur Institute of Algeria between 1969 and 1973. 53,2% of the sera tested were shown to be positive. Although geographically limited, this investigation reveals the frequency of toxoplasmic infection in the Algiers region with a predominance of the polyadenopathic benign form. Moreover, the causative role of toxoplasmosis in repeated abortions is confirmed.

Algeria↗