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Biomedical subjects

O Faye

Publications and source records attributed to O Faye.

At least 37 records · Page 2Linked to original sources
PubMed2001

[Antifungal drug susceptibility of Candida causing oropharyngeal candidiasis in HIV infected patients].

Candidiasis are very usual infections of HIV infected patients. By medicine pressure, susceptibility to antifungal drugs decrease in some Candida strains. This study carded out in 1997 at hospital, aimed to identify the yeast species isolated from HIV infected patients with oropharyngeal candidiasis, test their susceptibility to antifungal drugs and a previous antifungal treatment impact. Thus, 60 patients yielded to questionnary were recruited. Isolated yeast colonies from buccal tract after culture on Sabouraud medium with chloramphenicol were identified with the API 20 C AUX (BioMérieux) system by assimilation of different sugars. Susceptibility was evaluated by ATB FUNGUS (BioMérieux) system. 55 from the 60 isolated yeasts were identified and among them C. albicans and C. tropicalis were the main species with 75% and 11,7% respectively rates. In HIV1 infected patients, all specieswere isolated and C. albicans predominated (80,4%) on the other hand, C. albicans and C. tropicalis were the only isolated yeasts from the HIV2 infected patients with 83,3% and 16,6% respectively rates. Susceptibility of C. albicans was 72,2% to nystatine, 58,3% to amphotericin B, 83,3% to flucytosin, 12,8% to miconazole, 8,5% to econazole and 10,6% to ketoconazole. Susceptibility of C. albicans to polyenes was modified by a previous antifungal treatment. This study indicated emergence of saprophytic yeasts of the buccal mucosa and seemed to be more fostered by HIV1 serotype than HIV2. So, C. albicans's susceptibility to polyenes decreased by untimely use of antifungal drugs and by controlling it one could improve the clinic conditions of HIV infected patients.

Adult↗
PubMed2000

[Value of post coital and cytological sperm tests in conjugal sterility in Senegal].

Conjugal infertility in Senegal is surrounded with accusatory believes most oftenly unfavourable to woman who is generally incriminated and, in somes cases, repudied. This study is an account of a research work carried out on conjugal infertility causes analysis, using post coital and cytospermiologic tests. It aims to help our populations to better appreciate the conjugal infertility by giving them elements for an objective appraisal of this flail, particulary about the mutual responsabilities of the two partners. In a first stage, we run post coital tests with 4636 Negro-African infertile couples living in Senegal, at the Clinical Cytology, Cytogenetics, and Reproductive Biology Laboratory of Aristide Le Dantec Hospital in a period dated from 1983 to 1996. Post coital tests were abnormal for 3838 couples and 3150 of them had anomalies incriminating the husbands. In a second stage, post coital tests were suggested to these 3150 husbands, but only 2842 accepted the post coital test suggestion. The others refused it for sociocultural reasons. It stooks out of this study that: the responsability in the conjugal sterility is mixed and shared by both partners in 43.78% cases, the masculine responsability (38.30%) ruled the feminine one (17.92%) contrary to local believes, almost one husband out of four (23.89%) presented azoospermy, the feminine responsability is ruled by infection factors that represented half of the glair abnormalities (50%). These results contradict the present local mentalities and believes which accuse principally the woman.

Attitude to Health↗
PubMed1999

[Experimental transmission of Crimean-Congo hemorrhagic fever virus: role of 3 vector species in the maintenance and transmission cycles in Senegal].

In this article, we published the role of three species of ticks Amblyomma variegatum (Fabricius, 1974), Hyalomma marginatum rufipes (Koch, 1844) and Hyalomma truncatum (Koch, 1844) in the maintenance and transmission of the CCHF virus. The imagos of these species were infected by intracoelomic route. Vertical transmission (transtasial and transovarial) and horizontal transmission for different stases were studied by isolation on newborn mice, polymerase chain reaction, indirect immunofluorescence and ELISA. Our results proved that 15 days after inoculation, infection rates of 100% were noted with Hyalomma marginatum rufipes and Hyalomma truncatum. This rate is about 60% for Amblyomma variegatum. The imagos of the three species infected have transmitted the virus to their host during blood feeding (100%). A high transovarial transmission for Hyalomma marginatum rufipes and Hyalomma truncatum were observed (respectively 53 and 50%). This rate is about 12% for Amblyomma variegatum. The tick infection does not persist up to the first generation for the three species studied. Ticks are temporary reservoirs vectors but not permanent reservoirs of CCHF virus.

Animals↗
PubMed1999

[Zoophagia and alternative host selection of the marlaia vectors in Senegal].

Blood-engorged females of An. gambiae s.l., An. funestus, An. pharoensis and An. rufipes caught resting indoors were tested (precipitin or enzyme-linked immunosorbent assay) to determine the source of bloodmeal. The species of the An. gambiae complex fed mainly on human hosts in all prospected areas, except in those of the mid Senegal river valley where an important zoophily was observed within and near the irrigation zone. Among 4,597 blood-engorged females of An. gambiae s.l., 29% fed on cattle with 7.5% of mixed boodmeals, mainly human-bovine or human-equine. The presence of cattle, culicid population densities and individual mosquito safety devices were the most determinant factors of animal deviation. Blood of most domestic animals was found in the stomach of collected females, but according to areas, bovines and equines were the main hosts for zoophilic females of An. gambiae s.l. Females of An. funestus collected in the middle-west were more anthropophilic than those collected in south-eastern areas. An. pharoensis was most prevalent in the Senegal river delta where it was found to be very anthropophilic. An. rufipes was strongly endophilic but exclusively zoophilic in all prospected areas.

Animals↗
PubMed1999

Status of pyrethroid resistance in Anopheles gambiae sensu lato.

The present study confirms the presence of pyrethroid resistance among Anopheles gambiae s.l mosquitos in Côte d'Ivoire and reports the observation of such resistance in two other countries in West Africa (Benin and Burkina Faso). Malaria vector populations from Cameroon (Central Africa), Senegal (West Africa) and Botswana (southern Africa) were found to be susceptible to pyrethroids. In the most resistant mosquito populations, resistance to permethrin was associated with reduced mortality, not only with respect to this compound but also towards deltamethrin. Moreover, a significant increase in knockdown time was observed in some mosquito populations before any decrease in mortality, suggesting that knockdown time could be a good indicator for the early detection of pyrethroid resistance. In view of the current extension of such resistance, there is an urgent need to set up a network in Africa to evaluate its development. It is also vital that the impact of this resistance on pyrethroid-impregnated bednets be assessed.

Africa↗
PubMed1999

[Experimental transmission of Crimean-Congo hemorrhagic fever virus by Rhipicephalus evertsi evertsi (Acarina:Ixodidae)].

We have conducted experiments to assess the ability of Rhipicephalus evertsi evertsi tick to transmit the Crimean-Congo haemorrhagic fever (CCHF) and determine their reproductive cycle. The Rh. e. evertsi was infected by intracoelomic (transparietal and intra-anal) inoculation during the imaginal stases and by oral feeding on an infected viremic goat during imaginal and nymphal stases. The infection rate, transovarial and trans-stasial CCHF virus transmission were monitored for virus reisolation after suckling mice inoculation and the virus identified by ELISA and IFA for antigen detection. After intracoelomic inoculation, unfed adults had viral titers ranging from 0.67 to 2.9 log DL50/0.02 ml and had transmitted the virus to their vertebrate hosts by blood feeding. After 8 to 10 days of blood feeding duration, infection rates were respectively 36% and 100% for male and female ticks. In two instances out of seven transovarial transmission was observed and the virus reisolated from larvae of first generation. However, the virus was not detected after nymphal metamorphosis. After blood feeding on viremic goats, 71% of the nymphae were infected. After metamorphoses 22% of the males and 42% of the females had a low virus titer. Rh. e. evertsi appears to have a limited efficacy in transmitting and replicating the CCHF virus but must be not neglected as a potential vector during an epizootic manifestation.

Animals↗
PubMed1999

[Heterogeneity of chloroquine resistant malaria in Senegal].

In order to evaluate the in vivo efficacy of chloroquine in the treatment of P. falciparum malaria, studies have been carried out in Richard-Toll, Fatick and Tambacounda, 3 areas where dynamics of transmission, population movements, as well as prophylactic and curative practises are different. Failure rates in treatment were 13% in site 1 (Richard-Toll) where medical pressure and population movements are high. In sites 2 and 3 (Fatick and Tambacounda), the failure rate was 3%. Even if medical pressure is lower in the latter site (Tambacounda), the higher transmission could be a factor in the spreading of resistance. A surveillance system and better use of chloroquine must be undertaken.

Adolescent↗
PubMed1999

[Management of severe malaria in children in developing countries. A protocol for economic evaluation].

This prospective one-year study was conducted as a preliminary phase to setting up a protocol for economic appraisal of management of severe malaria at Albert Royer Children's Hospital in Dakar, Senegal. Data was routinely collected using a standardized checklist. The four key indicators chosen for this study were nurse workload, adequacy of care (number of patients receiving adequate care), direct cost, and mortality rate. The mean daily care workload was estimated to be 27.2 minutes. This indicator assesses the relationship between supply and demand. Based on 5 criteria, care was considered as adequate in 54.5 p. 100 of patients. This indicator is helpful in judging the effectiveness of the therapeutic modalities used. The direct cost of treating severe malaria was estimated to be 45963 CFA francs. This indicator will be useful in establishing controls to reduce costs. The mortality rate was 12.2 p. 100. Comparison of this rate with previous years suggests little improvement in the outcome of malaria management at the institution. This indicator must be taken into account in the ongoing quality control program. Overall these findings should enable institutional decision-making to improve management of severe malaria based on objective measurable data.

Child↗
PubMed1999

[Pneumocystosis in HIV infected patients presenting with acid-fast bacilli negative pneumopathy at the Central University Hospital at Dakar].

Pneumocystosis is an opportunist parasitic disease which occurs currently at Europe and United States in HIV infected patients. In Africa, the disease is not current. Pneumocystosis has been detected in the Fann medical universitary center at Dakar from HIV infected patients with acido alcoholo resistant bacilli negative pneumopathy. Analysis of broncho alveolar liquid(BAL) of 29 patients after Giemsa and Blue of Toluidin O staining allowed isolating of two cases of pneumocystosis. A man and a woman were the patients. They were HIV1 positive with at X ray bilateral interstitial syndrome. The CD4 lymphocytes count of the one was lower than 200/mm3 and for the other it was higher than 200/mm3.

Acquired Immunodeficiency Syndrome↗
PubMed1998

Origin and prevention of airport malaria in France.

Since 1969, 63 cases of airport malaria have been reported in Western Europe, 24 of which occurred in France. Most were due to Plasmodium falciparum. In 1994, 7 cases occurred in and around Roissy Charles de Gaulle airport (CDG), showing 4 types of contamination: among employees working on airstrips or opening containers, among residents living near the airport, among people living at some distance from the airport after a secondary transport of vectors, and by vectors transported in luggage. In-flight or stop-over infection is not considered as airport malaria. The infective anophelines originated from airports where malaria transmission occurs, mostly in subsaharan Africa. A tentative list is given taking into account aerial traffic with France. Surveys in the airports of Dakar (Senegal), Cotonou (Benin), Abidjan (Cote d'Ivoire) and Yaoundé (Cameroun) found potential vectors in all of these from July to September. After 1994, the Contrôle Sanitaire aux Frontières (CSF) in charge at CDG concentrated its efforts on the flights at risk, as well as information and sensitization of airline companies, which resulted in 73% and 87% of the flights at risk being properly disinsected in 1995 and 1996. Despite pyrethroid resistance in Anopheles gambiae s.s. in West Africa, the efficacy of aircraft spraying with permethrin aerosols is still acceptable. However, surveillance of resistance should be improved and search for nonpyrethroid insecticides suitable for aircraft strongly encouraged.

Africa, Western↗
PubMed1998

Skin diseases in Bamako (Mali).

BACKGROUND: Skin diseases have only recently been considered as a possible public health problem in developing countries. Data supporting this matter are scarce. The aim of this study is to report the experience of a specialized dermatologic center in Bamako (Mali) in order to complete two previous studies conducted in the Bamako area: a prevalence study in the general population and a study in nonspecialized health centers of Bamako. It is our intention to provide a comprehensive picture of the problem of skin diseases in an African developing country. METHODS: We retrospectively collected all cases of skin diseases diagnosed during consultations provided at the Institut Marchoux in Bamako, the only center specializing in dermatology in Mali, during the year 1993. RESULTS: A total of 10,575 new outpatients were seen with 10,889 skin diseases. The main skin diseases registered were as follows: infectious dermatoses (41% of all diagnoses, including scabies (16.6%), superficial mycoses (13.6%), and primary pyoderma (5.6%)), dermatitis (20.4%), papular urticaria (4.4%), acne (4.2%), pityriasis alba (3.6%), keratoderma (3.6%), and urticaria (3%). Typical tropical infectious diseases accounted for only 1% of all diagnoses. CONCLUSIONS: It appears that certain skin diseases (mainly scabies and pyoderma) are an important health problem for the population of the Bamako area. Public health policies should be implemented in order to manage this problem rationally.

Acquired Immunodeficiency Syndrome↗
PubMed1998

[Interepidemic supervision of the leishmania focus of Keur Moussa (Thies, Senegal)].

A supervision of the focus of human cutaneous leishmaniasis of Keur Moussa has been carried out in 1988-1989 and in 1991-1992. Among the 13 species gathering the 10,144 phlebotomine sandflies trapped, two belong to genus Phlebotomus, the others to genus Sergentomyia. Phlebotomus duboscqi, that has been found out by Deded et al. in 1980 as the vector of this leishmaniasis in Senegal, is the most represented species after Sergentomyia schwetzi, with respectively 32.3 and 28.5% of the found during these two periods. It is twice more abundant and frequent in the monastery area than the religious one. This difference may be due to the better micro-climatic conditions, the abundance of rodents and the human proximity. After the rainy seasons that influence a lot P. duboscqi's activity, the density of phlebotomine sandflies makes a progressive rise, as well as the temperature and humidity, to reach two maxima in April-May and July-August. Parasitological studies on females of phlebotomine sandflies and rodents Arvicanthis niloticus, Mastomys erythroleucus and Cricetomys gambianus are negative. This focus seems to be again in an inter-epidemic phase.

Animals↗
PubMed1998

[Impact of the use of permethrin pre-impregnated mosquito nets on malaria transmission in a hyperendemic village of Senegal].

The efficacy of permethrin-treated bednets was evaluated in Wassadou, a hyperendemic village located in the Sudanese grasslands of southeast Senegal. Pretreatment data were collected between 1992 and 1993. Bednets were distributed to the whole population in June 1995 and impact of their use on vector populations and malaria transmission was evaluated until November 1995. This period corresponds to the rainy season during which malaria transmission is highest. Data were compared with a control village in which bednets were not distributed. Findings showed that use of bednets led to a sharp decrease in the density of the vector population and malaria transmission. The number of bites by Anopheles gambiae s.1. decreased 69%. The density of blood-laden and pregnant females inside dwellings decreased 91% and 96% respectively. The sporozoite index of females captured on the skin decreased 76% and the daily rate of entomological inoculation decreased 88%. This impact was not great enough to eliminate the risk of infection. Prolonged study over a period of 4 to 5 years is needed to evaluate the impact of long-term use of insecticide-treated bednets on vector population and malaria transmission.

Animals↗
PubMed1998

[Malaria lethality in Dakar pediatric environment: study of risk factors].

To determine risk factors for fatal malaria in Senegalese children, a 3-year case-control study was carried out between October 1992 and November 1995 at the Albert Royer Hospital in Dakar. The case group included 52 children who died from documented malaria in the hospital. The matched control group consisted of children who responded favorably to hospital treatment. Exposure to risk was measured with regard to age, nutritional status, educational level of parents, self-medication prior to hospitalization, socioeconomic level, degree of fever, and blood parasite levels. Cases and controls were compared using statistical tests for matched groups. Age lower than 5 years, poor educational level of parents, delay of treatment more than 24 hours, nutritional status, and blood parasite levels greater than 5% were associated with a significantly higher risk of fatal outcome. Conversely, low socio-economic level, recent self-medication, and fever over 41 degrees C were not associated with higher fatality. These findings emphasize the need for more information campaigns to encourage people to seek institutionalized care when fever appears. Our results also suggest that prophylactic treatment may be advisable in children under 5 years of age and in some high risk groups.

Adolescent↗
PubMed1998

[Evaluation of parasitic risks related to the revitalization of the Ferlo fossil valley (Senegal)].

In order to assess the parasitic risks related to Ferlo's valley water launching, a study has been carried out from september 15 to october 10, 1996 in 12 villages. Four villages surrounding the Guiers lake, four lower within lower Ferlo already water launched 7 years ago, and four villages within upper Ferlo not water launched. Malaria strikes at hypoendemic level in the villages surrounding the Guiers lake (p.i = 6.2%) and at mesoendemic level in the area stretching along lower (P.I = 37.6%) and upper Ferlo (P.I = 34.3%) The prevalence rate of urinary bilharziosis is 0.002% in the first area, 1.3% in the second one and 14.5% in the third area. In these areas, intestinal parasitosis were prevailing respectively at rates of 38.2%, 36.4% and 22.2%. Although, there is no reason to fear immediately a worsening of the epidemiological situation due to Ferlo's valley revitalisation project, nevertheless, appropriate steps should be taken right now aiming at tacking the extension of conditions related to hydric medium.

Adolescent↗
PubMed1998

[Intestinal parasites in the vendors and consumers of street food. A study conducted in the Dakar area].

In order to assess the parasitic risk for street-food consumers, the authors conducted two studies from September to August 1996, one on street-food sellers (305) and the other on consumers (235). Among the consumers, 127 were considered as not exposed to risk, since they did not frequent the sector being surveyed, and 108 were exposed because they consumed at least one meal per day cooked by the sellers of this area. Both groups filled out a questionnaire and had their stools analysed according to the RITCHIE method. The infection rate was 60% among sellers and 45.5% among consumers. Protozoans were predominant in both groups. Among the consumers, those exposed were significantly more infected. Even though the sellers represent a parasitic risk due to their level of infection and the typology of parasites they shelter, one cannot assume that consumers are contaminated only by the sellers of street food. However, appropriate measures must be implemented in order to minimize risks for street-food consumers.

Feces↗
PubMed1998

Subulura saloumensis n. sp. (Nematoda, Subuluroidea) from four species of rodents in Senegal.

A new species of the genus Subulura is described from 4 new rodent hosts: Arvicanthis niloticus, Mastomys erythroleucus, Mastomys huberti, and Tatera gambiana. Subulura saloumensis n. sp. differs from the congeneric species by the morphology of its head. the absence of buccal lobes, the length of right and left spicules, the absence of caudal alae, and the existence of a caudal papillae with a sensorial bristle. The latter, which we observe for the first time in specimens gathered from M. huberti, has never previously been described in a species of the genus Subulura.

Animals↗