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1.
J Clin Virol ; 58(4): 696-702, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24210330

RESUMO

BACKGROUND: HIV infection is associated with greater risk of precancerous lesions and cervical cancer in women. However, several factors remain unclarified regarding the association between HIV infection and HPV detection, especially among those with HIV type 2 versus type 1 infection and severely immunocompromised persons. OBJECTIVES: To evaluate HPV overall and type-specific detection among HIV-infected and uninfected women in Senegal. STUDY DESIGN: Detection of HPV DNA for 38 genotypes in cervical swabs using PCR-based methods was evaluated in HIV-positive (n=467) and HIV-negative (n=2139) women participating in studies in Senegal. Among HIV-1 and/or HIV-2 positive women, CD4 counts were assessed. Adjusted multivariable prevalence ratios (PR) were calculated. RESULTS: The prevalence of any HPV DNA and multiple HPV types was greater among HIV-infected individuals (78.2% and 62.3%, respectively) compared with HIV-negative women (27.1% and 11.6%). This trend was also seen for HPV types 16 and 18 (13.1% and 10.9%) compared to HIV-negative women (2.2% and 1.7%). HIV-infected women with CD4 cell counts less than 200 cells/µl had a higher likelihood of any HPV detection (PRa 1.30; 95% CI 1.07-1.59), multiple HPV types (PRa 1.52; 95% CI 1.14-2.01), and HPV-16 (PRa 9.00; 95% CI 1.66-48.67), but not HPV-18 (PRa 1.20, 95% CI 0.45-3.24) compared to those with CD4 counts 500 cells/µl or above. CONCLUSION: HIV-infected women, especially those most severely immunocompromised, are more likely to harbor HPV. Measures to prevent initial HPV infection and subsequent development of cervical cancer through focused screening efforts should be implemented in these high risk populations.


Assuntos
Colo do Útero/virologia , DNA Viral/sangue , Infecções por HIV/sangue , Infecções por HIV/virologia , Papillomaviridae/genética , Infecções por Papillomavirus/sangue , Infecções por Papillomavirus/virologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Contagem de Linfócito CD4 , Estudos Transversais , Feminino , Infecções por HIV/epidemiologia , HIV-1/isolamento & purificação , HIV-2/isolamento & purificação , Humanos , Pessoa de Meia-Idade , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/epidemiologia , Senegal/epidemiologia , Adulto Jovem
2.
Int J STD AIDS ; 23(10): 710-6, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23104745

RESUMO

We assessed trends in the relative prevalences of HIV-1, HIV-2 and dual HIV-1/HIV-2 infection in 10,321 women attending outpatient clinics in Senegal between 1990 and 2009. The relative prevalence of HIV-1 (defined as the proportion of seropositive subjects having HIV-1) rose sharply from 38% in 1990 until 1993 (P < 0.001), whereupon it continued to rise, but at a slower rate, reaching 72% of HIV infections in 2009. As compared with HIV-1, the relative prevalence of HIV-2 decreased sharply from 54% in 1990 until 1993 (P < 0.001) and continued to decrease at a slower rate through 2009. The relative prevalence of dual infection, as compared with HIV-1, was stable from 1990 to 1993, but decreased slightly thereafter (P < 0.001). These study findings indicate that during the early 1990s, the relative prevalence of HIV-1 increased markedly, while the relative prevalence of HIV-2 decreased and the relative prevalence of dual infection remained stable in Senegal. From 1993 to 2009, the relative prevalence of HIV-1 increased at a slower rate, while the relative prevalences of HIV-2 and dual infection decreased. These results confirm trends in HIV prevalence observed in other West African populations and provide a critical update on HIV transmission risk among women in Senegal.


Assuntos
Coinfecção/epidemiologia , Coinfecção/virologia , Infecções por HIV/epidemiologia , Infecções por HIV/virologia , HIV-1/isolamento & purificação , HIV-2/isolamento & purificação , Adulto , Feminino , Humanos , Modelos Logísticos , Programas de Rastreamento/estatística & dados numéricos , Pessoa de Meia-Idade , Prevalência , Estudos Retrospectivos , Senegal/epidemiologia
3.
Int J Tuberc Lung Dis ; 15(5): 620-7, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21756512

RESUMO

BACKGROUND: Tuberculosis (TB) is a common diagnosis in human immunodeficiency virus (HIV) infected patients on antiretroviral treatment (ART). OBJECTIVE: To describe TB-related practices in ART programmes in lower-income countries and identify risk factors for TB in the first year of ART. METHODS: Programme characteristics were assessed using standardised electronic questionnaire. Patient data from 2003 to 2008 were analysed and incidence rate ratios (IRRs) calculated using Poisson regression models. RESULTS: Fifteen ART programmes in 12 countries in Africa, South America and Asia were included. Chest X-ray, sputum microscopy and culture were available free of charge in respectively 13 (86.7%), 14 (93.3%) and eight (53.3%) programmes. Eight sites (53.3%) used directly observed treatment and five (33.3%) routinely administered isoniazid preventive treatment (IPT). A total of 19 413 patients aged ≥ 16 years contributed 13,227 person-years of follow-up; 1081 new TB events were diagnosed. Risk factors included CD4 cell count (>350 cells/µl vs. <25 cells/µl, adjusted IRR 0.46, 95%CI 0.33-0.64, P < 0.0001), sex (women vs. men, adjusted IRR 0.77, 95%CI 0.68-0.88, P = 0.0001) and use of IPT (IRR 0.24, 95%CI 0.19-0.31, P < 0.0001). CONCLUSIONS: Diagnostic capacity and practices vary widely across ART programmes. IPT prevented TB, but was used in few programmes. More efforts are needed to reduce the burden of TB in HIV co-infected patients in lower income countries.


Assuntos
Infecções Oportunistas Relacionadas com a AIDS/epidemiologia , Fármacos Anti-HIV/uso terapêutico , Infecções por HIV/tratamento farmacológico , Tuberculose/epidemiologia , Infecções Oportunistas Relacionadas com a AIDS/diagnóstico , Adolescente , Adulto , Antituberculosos/uso terapêutico , Coinfecção , Países em Desenvolvimento , Feminino , Seguimentos , Infecções por HIV/complicações , Humanos , Isoniazida/uso terapêutico , Masculino , Pessoa de Meia-Idade , Programas Nacionais de Saúde , Distribuição de Poisson , Fatores de Risco , Fatores Sexuais , Escarro/microbiologia , Inquéritos e Questionários , Tuberculose/etiologia , Tuberculose/prevenção & controle , Adulto Jovem
4.
Rev Mal Respir ; 27(9): 1015-21, 2010 Nov.
Artigo em Francês | MEDLINE | ID: mdl-21111271

RESUMO

A prospective study was carried out in two tertiary hospitals in Dakar to determine the main causes of sputum acid-fast bacillus (AFB) smear-negative pneumonia in HIV-infected patients. All clinical and microbiological records were reviewed by experts. Seventy patients were finally enrolled. Most of them were hospitalized at an advanced stage of AIDS. The median CD4 cell count was 62/mm(3) and the median body mass index (BMC) was 18 kg/m(2). Thirty-one patients (44 %) were known as seropositive for HIV infection prior to admission. Radiological opacities were localized in 70 % of patients and diffuse in 21 %. Fiberoptic bronchoscopy was performed in 50 patients (71 %). A definite or probable diagnosis was obtained in 55 patients (79 %). Bacterial pneumonia (usually due to Enterobacteriaceae and Pseudomonas aeruginosa), tuberculosis, Pneumocystis pneumoniae and other causes (Kaposi's sarcoma, atypical mycobacteria) were diagnosed in 67 %, 24 %, 5 %, and 13 % of these patients respectively. In conclusion, pneumonia of bacterial origin and tuberculosis can be incriminated in the majority of cases of AFB negative pneumonia observed in HIV patients in Dakar.


Assuntos
Infecções por HIV/complicações , Hospitalização , Pneumonia Bacteriana/microbiologia , Árvores de Decisões , Humanos , Pneumonia Bacteriana/diagnóstico , Pneumonia Bacteriana/etiologia , Pneumonia Bacteriana/terapia , Estudos Prospectivos , Senegal
5.
AIDS Res Hum Retroviruses ; 26(5): 519-25, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20455760

RESUMO

The use of ritonavir as a protease inhibitor boost is rare in sub-Saharan Africa because a heat-stable formula is not available. We report the results of an open-label pilot trial with unboosted atazanavir in combination with lamivudine and didanosine as first-line therapy conducted in Senegal. Treatment-naive HIV-1 infected adult patients without active opportunistic disease were included. The primary endpoint was the proportion of patients with plasma HIV-1 RNA <400 copies/ml at week 48. Forty patients (12 men and 28 women; mean age +/- SD: 40 +/- 9 years) were included. Treatment was changed during the study for two patients (pregnancy, tuberculosis); one patient was lost to follow-up and one patient died (gastroenteritis with cachexia). At week 48, 78% [95% confidence interval (CI): 65-90%] and 68% (95% CI: 53-82%) of the patients had HIV-1 RNA <400 and <50 copies/ml, respectively (intent-to-treat analysis; not completer = failure). Among the seven patients with HIV-1 RNA >or=400 copies/ml at week 48, five were not compliant; genotyping analysis (n = 4) did not reveal a major mutation for protease inhibitors. The mean CD4 cell count change from baseline to week 48 was +238 +/- 79 cells/mm(3). The combination of unboosted atazanavir with lamivudine and didanosine was efficient and well tolerated in HIV-1-infected patients with results similar to those observed in Northern countries. These results suggest that unboosted atazanavir with its high genetic barrier could be a valuable alternative to NNRTIs in resource-limited countries in some HIV-1-infected patients in case of compliance issues with NNRTIs, intolerance to NNRTIs, resistance mutations to NNRTIs, in women with childbearing potential, or as a maintenance therapy in patients with virological suppression.


Assuntos
Fármacos Anti-HIV , Didanosina , Infecções por HIV/tratamento farmacológico , Lamivudina , Oligopeptídeos , Piridinas , Adulto , Fármacos Anti-HIV/administração & dosagem , Fármacos Anti-HIV/efeitos adversos , Fármacos Anti-HIV/uso terapêutico , Sulfato de Atazanavir , Didanosina/administração & dosagem , Didanosina/efeitos adversos , Didanosina/uso terapêutico , Esquema de Medicação , Quimioterapia Combinada , Feminino , Infecções por HIV/imunologia , Infecções por HIV/virologia , HIV-1/efeitos dos fármacos , HIV-1/fisiologia , Humanos , Lamivudina/administração & dosagem , Lamivudina/efeitos adversos , Lamivudina/uso terapêutico , Masculino , Pessoa de Meia-Idade , Oligopeptídeos/administração & dosagem , Oligopeptídeos/efeitos adversos , Oligopeptídeos/uso terapêutico , Projetos Piloto , Piridinas/administração & dosagem , Piridinas/efeitos adversos , Piridinas/uso terapêutico , RNA Viral/sangue , Inibidores da Transcriptase Reversa/administração & dosagem , Inibidores da Transcriptase Reversa/efeitos adversos , Inibidores da Transcriptase Reversa/uso terapêutico , Senegal , Resultado do Tratamento
6.
Bull Soc Pathol Exot ; 101(4): 311-3, 2008 Oct.
Artigo em Francês | MEDLINE | ID: mdl-18956812

RESUMO

Cryptococcal infection is common in immunocompromised patients. Its occurrence in immuno-competent patients is rare. We report here 3 cases of neuromeningeal cryptococcosis in patients without any immunosuppressive documented factors. They were respectively 25, 36 and 50 years old presenting clinical signs of chronic meningo-encephalitis. The HIV test was negative for all of them and the CD4 counts were normal. One patient died on the seventh day of the treatment with amphotericin B; the second was discharged on parents' request, while the third patient improved with intravenous fluconazole. This study suggests that when facing a sub-acute or chronic meningitis, an investigation for cryptococcal infection is recommended as before AIDS epidemic.


Assuntos
Meningite Criptocócica/diagnóstico , Adulto , Anfotericina B/uso terapêutico , Antifúngicos/uso terapêutico , Contagem de Linfócito CD4 , Evolução Fatal , Feminino , Fluconazol/uso terapêutico , Soronegatividade para HIV , Humanos , Hospedeiro Imunocomprometido , Masculino , Meningite Criptocócica/imunologia , Pessoa de Meia-Idade , Senegal , Resultado do Tratamento
7.
Clin Exp Immunol ; 151(3): 432-40, 2008 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18190600

RESUMO

CD4+ lymphocytes are a primary target of the human immunodeficiency virus (HIV), and CD4 counts are one of the factors used to measure disease progression in HIV-positive individuals. CD4 counts vary in uninfected individuals and across populations due to a variety of demographic, environmental, immunological and genetic factors that probably persist throughout the course of HIV infection. This study sought to determine reference levels and identify factors that influence lymphocyte counts in 681 HIV-uninfected adults in Senegal, where residents are exposed to a variety of infectious diseases and other conditions that may affect CD4 counts. Lymphocyte counts were assessed in commercial sex workers, symptomatic men and women presenting to the University of Dakar infectious disease clinic for out-patient care and women seeking family planning services. CD4 and CD3 lymphocyte counts differed between the four study groups (P < 0.01). Men had the lowest mean CD4 count (711.6 cells/microl), while commercial sex workers had the highest levels (966.0 cells/microl). After adjustment for age and other behavioural and clinical factors, the difference in CD4 counts between the three groups of women did not remain. However, both gender and smoking were associated independently with CD4 counts, as men maintained lower mean CD4 counts (beta = -156.4 cells/microl, P < 0.01) and smokers had higher mean CD4 counts (beta = 124.0 cells/microl, P < 0.01) than non-smokers in multivariable analyses. This study is the first to explore factors that may influence CD4 levels in Senegal and to estimate baseline CD4 levels among HIV-negatives, information that may guide clinicians in interpreting CD4 counts.


Assuntos
Contagem de Linfócito CD4 , Soronegatividade para HIV/imunologia , Adulto , Doenças Transmissíveis/imunologia , Feminino , Humanos , Contagem de Linfócitos , Masculino , Pessoa de Meia-Idade , Valores de Referência , Fatores Sexuais , Trabalho Sexual , Comportamento Sexual , Fumar/imunologia
8.
Cancer Gene Ther ; 13(12): 1072-81, 2006 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-16874361

RESUMO

There is growing evidence from in vitro studies that subgroup B adenoviruses (Ad) can overcome the limitations in safety and tumor transduction efficiency seen with commonly used subgroup C serotype 5-based vectors. In this study, we confirm that the expression level of the B-group Ad receptor, CD46, correlates with the grade of malignancy of cervical cancer in situ. We also demonstrate the in vivo properties of Ad5-based vectors that contain the B-group Ad serotype 35 fiber (Ad5/35) in transgenic mice that express CD46 in a pattern and at a level similar to humans. Upon intravenous and intraperitoneal injection, an Ad5/35 vector did not efficiently transduce normal tissue, but was able to target metastatic or intraperitoneal tumors that express CD46 at levels comparable to human tumors. When an oncolytic Ad5/35-based vector was employed, in both tumor models antitumor effects were observed. Furthermore, injection of Ad5/35 vectors into CD46 transgenic mice caused less innate toxicity than Ad5 vectors. Our data demonstrate that Ad vectors that target CD46 offer advantages over Ad5-based vectors for treatment of cancer.


Assuntos
Adenoviridae/genética , Terapia Genética/métodos , Vetores Genéticos/farmacologia , Neoplasias/terapia , Animais , Linhagem Celular Tumoral , Quimiocinas/sangue , Ilhas de CpG , Citocinas/sangue , Metilação de DNA , Feminino , Vetores Genéticos/genética , Vetores Genéticos/farmacocinética , Humanos , Inflamação/imunologia , Inflamação/metabolismo , Proteína Cofatora de Membrana/genética , Proteína Cofatora de Membrana/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Recoverina/genética , Recoverina/metabolismo , Distribuição Tecidual , Neoplasias do Colo do Útero/imunologia
9.
Med Trop (Mars) ; 66(1): 64-8, 2006 Feb.
Artigo em Francês | MEDLINE | ID: mdl-16615618

RESUMO

The objectives of this study conducted from January to December 2001 at our reference centre for sexualy transmitted infections (STI) were to determine the epidemiological profile of men who consulted our facility for symptomatic STI, describe the clinical manifestations of STI, and propose recommendations for improving therapeutic management of STI in tropical areas. A total of 100 men consulting for symptomatic STI were included over the one-year study period. In addition to administering a standardized questionnaire to each patient, a thorough clinical examination especially of the urogenital tract was performed and blood and urethral discharge specimens were obtained for analysis at the Reference STI laboratory of Institut d'Hygiène Sociale (IHS). Analysis of study data demonstrated that the mean age of patients was 25 years, that 52% were single, and that level of education was generally low (primary school for 37% and secondary school for 27%). However it should be pointed out that 12% of patients had a university level education. Most patients were Wolof people living in or around Dakar and working in the trades sector (shopkeeper, artists, tailors, drivers, and seamen). Thirty-seven percent of patients reported previous STI involving urethral discharge in 34% and genital ulcer in 3%. Risk factors included sex with random partners in 51% including 31% with prostitutes, more than two partners at the time of the study in 34%, and regular alcohol use in 44%. Neisseria gonorrhoea was by far the most frequent infectious agent found in urethral discharge specimens (52%). Genital ulcer was found in only 13 cases. Eight of 13 patients with genital ulcers had positive syphilis serology suggesting that syphilis was the most frequent aetiology. The other aetiologies were uncommon STI, ie., condyloma (n=3), balanitis (n=2), venereal lymphogranuloma (n=1) and secondary syphilis (n=1). Serology was positive for HIV in 4% of patients. The epidemiologic profile of the patients in our study was similar to those previously reported in the literature. However it is interesting to note the non-negligible number of cases of STI transmission involving illegal prostitution, the high incidence of mismanagement of STI by the health care workers who provided initial treatment, the poor availability of drugs used for treatment of STI therapy in the centre's Banako Initiative (BI) pharmacy, and the frequency of condom non-use by patients with STI.


Assuntos
Infecções Sexualmente Transmissíveis/diagnóstico , Adulto , Escolaridade , Doenças dos Genitais Masculinos , Humanos , Masculino , Estado Civil , Pessoa de Meia-Idade , Neisseria gonorrhoeae/isolamento & purificação , Estudos Prospectivos , Fatores de Risco , Senegal/epidemiologia , Parceiros Sexuais , Infecções Sexualmente Transmissíveis/epidemiologia , Infecções Sexualmente Transmissíveis/terapia , Sífilis/diagnóstico , Úlcera , Uretra
10.
Bull Soc Pathol Exot ; 98(2): 118-20, 2005 Jun.
Artigo em Francês | MEDLINE | ID: mdl-16050378

RESUMO

The correct management of pain is one of the most frequent problems in a daily medical practice. To achieve this goal physicians have to use many drugs. Among these drugs morphinics represent a special category with specific rules of administration. To assess the use of morphinics in the management of pain in Dakar teaching hospitals and to determine the reasons of under or over prescription, we carried out this study A questionnaire was sent to 200 medical doctors in two teaching hospitals in Dakar between February and April 1999. The response rate was 89.5% (179). According to 73.2% of medical doctors who answered the questionnaire, pain frequently leads to consultation but surprisingly only 14 physicians (7.8%) recognize a regular use of morphinics while 70.1% of them prescribe morphinics exceptionally Morphinics are mainly used to control pain in cancerology (37.2%) and post-operative pain (21.3%). The main reasons to explain the under-use of morphinics were: the fear of respiratory side-effects of morphinics (35.3%), the ignorance of prescription rules (23.5%). The training regarding prescription of morphinics was provided during medical studies and only 10 out of the medical doctors had an adequate postgraduate training in this domain. As expected 51.4% of physicians thought that their training during medical studies was inadequate. To improve the management of pain in our country we recommend a better training of medical doctors during medical studies and the promotion of postgraduate seminars on the use of these molecules. The legislation and rules of administration must be cleared and these drugs should be more available in drugstores and hospital pharmacies. All of these modifications are necessary to help medical doctors to overcome the fear of morphinics for a better management of pain in our country.


Assuntos
Prescrições de Medicamentos/estatística & dados numéricos , Hospitais Universitários , Derivados da Morfina/uso terapêutico , Dor/tratamento farmacológico , Adulto , Idoso , Analgesia , Educação Médica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Derivados da Morfina/administração & dosagem , Médicos , Senegal , Inquéritos e Questionários
11.
Dakar Med ; 50(3): 176-82, 2005.
Artigo em Francês | MEDLINE | ID: mdl-17633006

RESUMO

INTRODUCTION: In order to appreciate the antiretroviral drugs impact in the HIV positive patients with peripheral neuropathy, a clinical, electrophysiological and neurpathological study of nerve biopsies was performed. PATIENTS AND METHODS: A group of 8 HIV seropositive patients with peripheral neuropathy was compared with an other group of 10 HIV seropositive patients treated with multiple antiretroviral drugs. Electrophysiological examination with motor nerve conduction velocity (MNCV) mesure of the median and the sciatic popliteal nerve was followed by nerve biopsy. Nerve fragments carried out the neuropathological technics for morphological examination. RESULTS: Eighteen seropositive HIV patients (16 HIV-1 and 2 HIV-2) were included in this study. Six patients among them had motor and sensitive neuropathy of the four limbs and 2 patients had sensitive neuropathy associated with pyramidal signs. In fine, 1 patient had sensitive neuropathy with distal amyotrophy of the four limbs. Slow MNCV was observed in all the patients and more severe in the lower limbs. Nerve were unexciting in the lower limbs in 2 patients. Nerve biopsy showed severe axonal loss in all the patients treated but one. They associated axonal lesion in 5 cases and myelinated lesions in 2 cases. Two patients non treated had normal nerve biopsy. Axonal loss was mild in 2 cases and very severe in one case associated with non inflammatory demyelinated lesions. CONCLUSION: we observed more severe and more frequent nerve lesions in treated patients than in no treated patients, as at the clinical, electrophysiological and neuropathological examination. Antiretroviral drugs cause more frequently pain motor and sensitive neuropathies at usual posologies. The occurence of recrudescence of pain peripheral neuropathy under antiretroviral treatment allows to reconsider drugs posologies.


Assuntos
Antirretrovirais/efeitos adversos , Soropositividade para HIV/tratamento farmacológico , Doenças do Sistema Nervoso Periférico/induzido quimicamente , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto
12.
J Virol ; 78(24): 13934-42, 2004 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-15564501

RESUMO

Human immunodeficiency virus type 2 (HIV-2) infection is typically less virulent than HIV-1 infection, which may permit the host to mount more effective, sustained T-cell immunity. We investigated antiviral gamma interferon-secreting T-cell responses by an ex vivo Elispot assay in 68 HIV-1- and 55 HIV-2-infected Senegalese patients to determine if differences relate to more efficient HIV-2 control. Homologous HIV-specific T cells were detected in similar frequencies (79% versus 76%, P = 0.7) and magnitude (3.12 versus 3.08 log(10) spot-forming cells/10(6) peripheral blood mononuclear cells) in HIV-1 and HIV-2 infection, respectively. Gag-specific responses predominated in both groups (>/=64%), and significantly higher Nef-specific responses occurred in HIV-1-infected (54%) than HIV-2-infected patients (22%) (P < 0.001). Heterologous responses were more frequent in HIV-1 than in HIV-2 infection (46% versus 27%, P = 0.04), but the mean magnitude was similar. Total frequencies of HIV-specific responses in both groups did not correlate with plasma viral load and CD4(+) T-cell count in multivariate regression analyses. However, the magnitude of HIV-2 Gag-specific responses was significantly associated with lower plasma viremia in HIV-1-infected patients (P = 0.04). CD4(+) T-helper responses, primarily recognizing HIV-2 Gag, were detected in 48% of HIV-2-infected compared to only 8% of HIV-1-infected patients. These findings indicate that improved control of HIV-2 infection may relate to the contribution of T-helper cell responses. By contrast, the superior control of HIV-1 replication associated with HIV-2 Gag responses suggests that these may represent cross-reactive, higher-avidity T cells targeting epitopes within Gag regions of functional importance in HIV replication.


Assuntos
Infecções por HIV/imunologia , HIV-1/imunologia , HIV-2/imunologia , Linfócitos T/imunologia , Adolescente , Adulto , Contagem de Linfócito CD4 , Feminino , Produtos do Gene gag/imunologia , Produtos do Gene nef/imunologia , Infecções por HIV/virologia , Humanos , Interferon gama/biossíntese , Masculino , Pessoa de Meia-Idade , RNA Viral/sangue , Senegal , Linfócitos T Auxiliares-Indutores/imunologia , Produtos do Gene nef do Vírus da Imunodeficiência Humana
13.
Br J Dermatol ; 150(5): 958-65, 2004 May.
Artigo em Inglês | MEDLINE | ID: mdl-15149509

RESUMO

BACKGROUND: Infective dermatitis (ID) is a rare dermatological condition of childhood that has been linked to human T-cell leukaemia/lymphoma virus type 1 (HTLV-1). Most cases have been reported in the Caribbean. Although several million people are estimated to be infected by HTLV-1 in sub-Saharan Africa, no case of ID has been reported in this area. OBJECTIVES: To identify and to describe cases of HTLV-1-associated ID in Senegal, West Africa. METHODS: Over a 3-year period, a serological test for HTLV-1 was performed at a dermatological centre in Dakar, Senegal, in children who presented with a picture suggestive of ID. Complementary haematological, immunological and virological investigations were performed in infected children and in their mothers. RESULTS: Five patients with typical HTLV-1-associated ID were identified, of ages 17, 5, 4, 3 and 3 years; two patients belonged to the same family. They all presented with repeated flares of superinfected dermatitis involving typical sites of ID (mainly the scalp, external ears, nares and eyelids), associated with nasal discharge, and less commonly with a nonspecific papular rash on the face or trunk. Although oral antibiotic therapy always gave effective control of the symptoms, recurrences were constant. A persisting dry dermatitis of the retroauricular folds was common between flares. Infection in the oldest patient was associated with a chronic adult T-cell leukaemia/lymphoma. The mothers of three patients, and the grandmother of another, were all infected by HTLV-1 strains belonging to the Cosmopolitan molecular subtype, with a perfect nucleotide identity of long-terminal repeat and env gp21 genomic regions within each family. CONCLUSIONS: We present the clinical and virological features of the first reported African cases of HTLV-1-associated ID. When compared with data from the Caribbean, infectious features seemed particularly prominent. ID appears to be overlooked in sub-Saharan Africa, where it might be easily confused with common pyoderma. Breast feeding appears to be the origin of HTLV-1 contamination of the children.


Assuntos
Dermatite/virologia , Leucemia-Linfoma de Células T do Adulto/complicações , Adolescente , Adulto , Pré-Escolar , Dermatite/patologia , Dermatoses Faciais/patologia , Dermatoses Faciais/virologia , Evolução Fatal , Feminino , Vírus Linfotrópico T Tipo 1 Humano/isolamento & purificação , Humanos , Leucemia-Linfoma de Células T do Adulto/diagnóstico , Leucemia-Linfoma de Células T do Adulto/transmissão , Masculino , Pessoa de Meia-Idade , Filogenia , Senegal
14.
Dakar Med ; 46(1): 65-7, 2001.
Artigo em Francês | MEDLINE | ID: mdl-15773162

RESUMO

Co-infection of Cryptococcal meningitis and syphilis is rare. We report the first case of coinfection with cryptococcus neoformans and treponema pallidum in Dakar. There was a 41 yearold senegalese man with HIV2 infection despite a CD4 count of 50 /mm3. The patient have had the history of precedent genital ulcerations and trush. Finally he died on eigth day of treatment with Fluconazol and Penicillin G.


Assuntos
Infecções por HIV/complicações , Meningite Criptocócica/complicações , Sífilis/complicações , Adulto , Infecções por HIV/sangue , Humanos , Masculino , Meningite Criptocócica/sangue , Sífilis/sangue , Sorodiagnóstico da Sífilis
15.
J Infect ; 41(2): 167-71, 2000 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-11023763

RESUMO

OBJECTIVES: To determine the frequency and associated features of severe CD4+ T-lymphocytopenia (<300 cells/mm(3)) in HIV-seronegative patients with tuberculosis. METHODS: Statistical analysis of 430 consecutively enrolled HIV-seronegative inpatients with tuberculosis in two teaching hospitals in Dakar, Senegal. RESULTS: The mean CD4 + cell count was 602+/-318.3 cells/mm(3). CD4 + cell counts were below 300 cells/mm(3)in 62 patients (14.4%). Patients with fewer than 300 CD4+ cells/mm(3)differed from those with higher counts in being less likely to have a positive smear for acid-fast bacilli; in having a higher frequency of extrapulmonary involvement (pleural effusion, adenopathy and miliary disease) and oral candidiasis; and in having smaller tuberculin reactions, lower haemoglobin levels, less cavitation and less patchy infiltration. After adjustment for gender and age, all differences remained except miliary disease. CONCLUSIONS: A substantial percentage (14.4%) of HIV-seronegative hospitalized patients for tuberculosis in a West African country presented with severe CD4 + T-lymphocyte depletion and had clinical and radiographic features indicative of more advanced disease and accompanying immunodepression. These results and those already published suggest that tuberculosis should be regarded as one of the diseases associated with a subgroup of patients with "idiopathic CD4 + T-lymphocytopenia".


Assuntos
Linfopenia/etiologia , Tuberculose/complicações , Adolescente , Adulto , Linfócitos T CD4-Positivos , Feminino , Soronegatividade para HIV , Humanos , Hospedeiro Imunocomprometido , Linfopenia/classificação , Linfopenia/epidemiologia , Masculino , Estudos Prospectivos , Senegal/epidemiologia , Índice de Gravidade de Doença , Tuberculose/imunologia
16.
Dakar Med ; 45(1): 5-7, 2000.
Artigo em Francês | MEDLINE | ID: mdl-14666780

RESUMO

This retrospective study was carried out to assess the recent epidemiological aspects of tetanus in Senegal. Based on the records of tetanus cases admitted at the Infectious Diseases Clinic in Dakar over a 7-year periode (1990-1996), this study showed that tetanus is still a major public health concern in Senegal. A global prevalence rate of 18.8% was found. Portals of entry were noticed to be: dirty wounds (48%), the umbilical stumps (19%), non sterile intra-muscular injections (4.5%), surgery (3.3%) and traditional practices (4.2%). Nevertheless, in a high proportion of cases (13.3%), the portal of entry was not found. A 30.3% case fatality rate was observed, that varied significantly according to portals of entry, reaching 60.4% in umbilical tetanus. It is recommended here that the immunization programme against tetanus be reinforced and supported by I E C Strategies together with retraining of medical personnel.


Assuntos
Tétano/epidemiologia , Centros Médicos Acadêmicos , Adolescente , Adulto , Distribuição por Idade , Causas de Morte , Criança , Pré-Escolar , Hospitalização/estatística & dados numéricos , Humanos , Lactente , Recém-Nascido , Injeções Intramusculares/efeitos adversos , Medicinas Tradicionais Africanas , Ambulatório Hospitalar , Vigilância da População , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Prevalência , Estudos Retrospectivos , Fatores de Risco , Senegal/epidemiologia , Tétano/etiologia , Tétano/prevenção & controle , Cordão Umbilical/cirurgia , Vacinação , Infecção dos Ferimentos/complicações
17.
Dakar Med ; 45(1): 45-7, 2000.
Artigo em Francês | MEDLINE | ID: mdl-14666790

RESUMO

To assess the epidemiological and clinical features of osteoarticular symptoms during tetanus infection, we carried out a retrospective study in infectious Diseases Ward of the University Teaching Hospital in Dakar (Senegal). Over a period of 7 years (1990-1996), 1, 199 cases of tetanus of more than 1 month of age were diagnosed. Among those who survived (n = 948), 18 cases of osteo-articular manifestations were observed (1.8%): 15 presented with vertebral fracture located within the thoracical part T4-T8 (83.3%) while 3 patients had para-articular osteoma in the elbows (16.7%). These complications occurred on stage II (89%) and stage III (11%) of Mollaret's classification of tetanus infection. Males were more represented than females (sex-ratio = 5) and the median age was 13 years (range = 6-45 years). The mean hospitalisation duration was significantly higher for patients with para-articular osteoma (6 weeks) than for those with vertebral fracture (3 weeks). No major functional impairment was noticed during hospitalisation and patients required only physiotherapy and clinical and radiological surveillance. Although not frequent and of some little functional consequence, osteoarticular complications of tetanus, should invite to improve the antitetanic immunization strategies in developing countries.


Assuntos
Doenças Ósseas Infecciosas/epidemiologia , Doenças Ósseas Infecciosas/microbiologia , Artropatias/epidemiologia , Artropatias/microbiologia , Tétano/complicações , Adolescente , Adulto , Distribuição por Idade , Criança , Países em Desenvolvimento , Doenças Endêmicas/prevenção & controle , Doenças Endêmicas/estatística & dados numéricos , Feminino , Fraturas Ósseas/epidemiologia , Fraturas Ósseas/microbiologia , Hospitais Universitários , Humanos , Tempo de Internação/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Vigilância da População , Prevalência , Saúde Pública , Estudos Retrospectivos , Fatores de Risco , Senegal/epidemiologia , Índice de Gravidade de Doença , Distribuição por Sexo , Tétano/classificação , Tétano/epidemiologia , Tétano/prevenção & controle , Vacinação
18.
Dakar Med ; 38(1): 97-100, 1993.
Artigo em Francês | MEDLINE | ID: mdl-7882859

RESUMO

In this prospective study undertaken between november 1989 and december 1991, the authors report their observations of ocular lesions seen in a cohort of 67 AIDS patients hospitalised in the Infectious Diseases department CHU Fann Dakar. Ocular lesions were discovered in 52.23%. These lesions were observed in both HIV-1 and HIV-2 positive patients, however they were much more common in the former group (77.14%). Rétinal pathology was by far the most frequently observed (63%) and yet classic retinis was not discovered in our series. We feel that the ophtalmologist should play a key role in the routine care of AIDS patients especially in surveillance of retinal changes.


PIP: During November 1989 to December 1991 in Senegal, physicians regularly followed 67 HIV infected patients aged 20-76 (46 men and 21 women) who had been admitted to Fann University Hospital in Dakar. The HIV infection had progressed to AIDS in all but one case. 52.33% had ocular lesions, of which the most frequent were cotton-like nodules (14.2%), retinal bleeding and Roth's spots (8.5%), and ophthalmic herpes zoster (8.5%). Most lesions (63%) were located in the retina. Yet, there were no cases of classic retinitis. Among 21 AIDS patients with a known lymphocyte count, 62.5% of those with a CD4 count of less than 200 had a normal ophthalmological examination. Patients with CD4 counts between 0 and 200 had macular edema, hyalitis, cotton-like nodules, retinal uveitis, and microangiopathy, while those with higher CD4 counts had none of these ocular lesions. Patients with CD4 counts greater than 400 had conjunctivitis (one case, Kaposi sarcoma-related conjunctivitis), ophthalmic herpes zoster, and ocular dryness. The only ocular lesion in patients with CD4 counts between 200 and 400 was ophthalmic herpes zoster. 77.14% of HIV infected patients with ocular lesions were infected with HIV-1. The three ophthalmic herpes zoster cases were less than 30 and homosexual. During the two years of follow-up, only one case died. Based on these findings, the authors suggest that ophthalmologists should systematically be involved in the routine care of AIDS patients, particularly by screening for changes in the retina.


Assuntos
Síndrome da Imunodeficiência Adquirida/complicações , Oftalmopatias/complicações , Adulto , Idoso , Oftalmopatias/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Senegal
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