Assessment of the genotype MTBDRplus assay for rifampin and isoniazid resistance detection on sputum samples in Cote d'Ivoire

We conducted an evaluation study on the GenoType MTBDRplus assay's ability to detect mutations conferring resistance to rifampin and isoniazid directly from sputum taken from 120 smear positive pulmonary patients from tuberculosis (TB) centers in Cote d'Ivoire. The sputum was decontaminated by N-acetyl-l-cysteine (NALC) and comparatively analyzed with the MTBDRplus assay version 2.0 and the mycobacterial growth indicator tube (MGIT) 960 automated drug susceptibility testing (MGIT-DST). The Gene-Xpert Mycobacterium tuberculosis (MTB)/rifampicin (RIF) assay was performed for 21 sputa with absence of hybridization for at least one rpoB wild-type probes. Four and seven, respectively, discordant and concordant results were also analyzed. The mutations in the rpoB gene were 21 (17.5%), 20 (16.7%), 7 (5.8%), and 10 (8.3%), respectively, for D516V, H526Y, H526D, and S531L. S315T mutation in katG gene associated or not with mutation in promoter of inhA was detected in 76 (63.3%) of the sputum. Compared to MGIT-DST, the sensitivity and specificity of the MTBDRplus for rifampin resistance detection were 100% (75-100%) and 73.2% (61.3-84%), respectively. For isoniazid resistance detection, the sensitivity and specificity were, respectively, 95% (90-‌99) and 95.1% (88.5-100%). Interpretation of 16 sputa without hybridization of rpoB wild-type probe 8 compared to those obtained with MGIT-DST and GeneXpert MTB/RIF was discordant and concordant, respectively, for 11 and 5.

Decompensated cirrhosis and pregnancy: a case report

The association of decompensated cirrhosis and pregnancy is rare. Portal hypertension exposure to gastrointestinal bleeding from a ruptured esophageal varix may at any time complicate the course of the disease. We report the case of a 24-year-old patient who delivered at 35 weeks/four days of gestation with decompensated cirrhosis secondary to viral hepatitis B; icterus, oedema, and ascites were present. The postpartum course was uneventful despite the biological disorder of coagulation.

[Cervical cancer: epidemiology and medical assistance in African society]

OBJECTIVES

The aim of this study was to improve the medical assistance and the prognostic of cervical cancer in African society.

MATERIALS AND METHODS

It was a retrospective and descriptive study carried out in the gynecology and obstetrics department at the teaching hospital of Cocody. It spanned over five years, from January 1st, 2002 to December 31st, 2006. It was focused on 171 cases of cervical cancer histologically confirmed.

RESULTS

The frequency of cervical cancer in that study was 1.7%. Patients had an average age of 48.5 years. 38.7% of patients were aged between 41 and 50. Multiparous represented 73.1% of patient with a majority of 38.6% for seven births and more. Patient socio-economic background was low in 72% of cases, married and divorced patients represented 63.2%. Patients who had an early sex and those with numerous partners respectively represented 77.2% and 73.2%. In 70.2% of cases, they had suffered a sexually transmitted infection once. Extension rate was limited to the financial capacities of our patients. Operable stages represented 19.3% and belated stages 57.1%. Only 8.8% of our patients were operated. The average theoretical cost of the surgical treatment was 298.203 F CFA.

CONCLUSION

This study showed that to improve medical assistance to patients, it is (capital) urgent to face efficiently the out break of factors of risk and improve diagnosis and therapy.

[Placenta praevia: maternal and featal prognosis in University Hospital of Cocody (Abidjan-Cote d'Ivoire)]

INTRODUCTION

In Africa, in spite of systematical practice of echography, Placenta praevia (PP) remains a high risky gravid complication, very unpredictable, with a high lethality rate.

OBJECTIVES

The aim of our study was to reconsider the frequency of this pathology, to appreciate the maternal and fetal prognosis.

PATIENTS AND METHODS

This was a retrospective cohort study, about 340 cases of PP, at the University Hospital of Cocody in Abidjan, during 5 years, from January 1st 2002 to December 31st 2006. We included in this study all the parturients with a gestational age > or = 28 weeks of amenorrhea, and a PP diagnosed during either pregnancy, or labour, or after placenta stage. Maternal age, parity, gynecologic and obstetrical antecedents, mode of delivery and maternal and fetal prognosis was compared between patients with PP and a group of witness chosen among normal pregnancies. The comparison has been done by using X² and Fischer test with a threshold of signification of 5%.

RESULTS

The frequency of PP in our study was 1.6%. The maternal age was > or = 30 years old for 43.2% of patients with PP against 28% in witness group (p=0.000). Among cases of PP, multiparous and high multiparous represented 37.7% against 10% in the witness group. Healing uterus was an increasing factor of PP (32 cases against 8 in witness group; p=0.024). Caesarean operation has been the principal mode of delivery among the patients with PP (80%). 43.8% of newborn was premature against 8.5% in the witness group (p=0.0000). The perinatal mortality was 21.3% in cases of PP against 3.8% in witness group. Three maternal deaths (0.9%) have been noticed among patients with PP.

CONCLUSION

The management of PP is still badly definite in Africa. The early diagnostic by ultrasound examination permit an adapted supervision and the prevention of all obstetrical complications of this pathology.

Tuberculosis of the cervix and infertility: report of a rare case

Tubercolosis is a frequent bacterial infection in less developed countries. Lung and lymph node localisations are common, while the genital apparatus is less involved. In this work a rare case of cervical tuberculosis followed by some lesions causing infertility in a 20-year-old woman is reported. The diagnosis was confirmed by a histological examination from a biopsy of the cervix. The patient was offered six-month antituberculosis therapy which eliminated the cervical lesions. A few years later she came under our care for infertility due to uterine adhesions diagnosed by hysterosalpingography. Now the patient is being treated for infertility complicated by amenorrhoea.

[Preliminary study on isoniazid-epiroprim combination in a tuberculosis murine model]

The purpose of this study regarding isoniazid-epiroprim's association applied to antituberculosis chemotherapy, carried through murine model, initiated into Institut Pasteur of Côte d'Ivoire and worked out at Institut Pasteur of Paris was to evaluate the epiroprim's effect alone and associated with isoniazid on Mycobacterium tuberculosis. Sixteen mouses (lineage C57Bl/6) were inoculated by venous way with 10(5) viable bacillus (strain H37Rv) suspended in 500 microliters sterile physiological aqueous solution and were shared out into 4 sets. Fifteen days later the sets have been submitted or not to a daily treatment by gavage during three weeks (epiroprim, isoniazid, isoniazid plus epiroprim). The mouses were euthanasied, spleen and lung were removed from each animal. The titres of determined bacillus into those organs prove that isoniazid and epiroprim associated seem more efficacious than the isoniazid monotherapy for mouses pulmonary tuberculosis. Bacillus obtained are sensitive to isoniazid.

Sensitivity and specificity of human immunodeficiency virus rapid serologic assays and testing algorithms in an antenatal clinic in Abidjan, Ivory Coast

To evaluate serologic testing algorithms for human immunodeficiency virus (HIV) based on a combination of rapid assays among persons with HIV-1 (non-B subtypes) infection, HIV-2 infection, and HIV-1-HIV-2 dual infections in Abidjan, Ivory Coast, a total of 1,216 sera with known HIV serologic status were used to evaluate the sensitivity and specificity of four rapid assays: Determine HIV-1/2, Capillus HIV-1/HIV-2, HIV-SPOT, and Genie II HIV-1/HIV-2. Two serum panels obtained from patients recently infected with HIV-1 subtypes B and non-B were also included. Based on sensitivity and specificity, three of the four rapid assays were evaluated prospectively in parallel (serum samples tested by two simultaneous rapid assays) and serial (serum samples tested by two consecutive rapid assays) testing algorithms. All assays were 100% sensitive, and specificities ranged from 99.4 to 100%. In the prospective evaluation, both the parallel and serial algorithms were 100% sensitive and specific. Our results suggest that rapid assays have high sensitivity and specificity and, when used in parallel or serial testing algorithms, yield results similar to those of enzyme-linked immunosorbent assay-based testing strategies. HIV serodiagnosis based on rapid assays may be a valuable alternative in implementing HIV prevention and surveillance programs in areas where sophisticated laboratories are difficult to establish.

Evaluation of HIV serial and parallel serologic testing algorithms in Abidjan, Côte d'Ivoire

OBJECTIVE

To evaluate HIV serologic testing algorithms based on a combination of three enzyme linked immunosorbent assays (ELISA) for the confirmation of HIV infection in Abidjan, Côte d'Ivoire, where HIV-2 and HIV-1 non-B subtypes are prevalent.

METHODS

A total of 1069 human sera with known serologic status, in addition to a seroconversion and low titer antibody panel were initially tested by six ELISA to determine the sensitivity, specificity and delta values of the assays. On the basis of the performance of the assays, three ELISA (Enzygnost, ICE 1.0.2, and Vironostika) were selected for use in a parallel and serial testing algorithm in analyzing 8283 consecutively collected sera. In the parallel testing algorithm, sera concordantly reactive or non-reactive by Enzygnost and ICE 1.0.2 were considered as true positive or true negative, respectively. In the serial algorithm, sera reactive by Enzygnost were retested by ICE 1.0.2. Sera with discordant results were tested by Vironostika, and the results was considered definitive. All reactive sera, plus a random sample of negative sera were tested for confirmation by Peptilav. In addition, a random sample of reactive sera was tested by Western blot.

RESULTS

All ELISA had 100% sensitivity; specificities ranged from 96.8 to 100%. Positive and negative delta values of the ELISA were high (range, 6.89 to 46.07 and -2.05 to -5.75, respectively). Of the 8283 sera, 2054 were considered true positives and were correctly classified by the parallel testing algorithm (sensitivity, 100%). Of the 6229 true negative sera, 6226 were negative by the parallel testing algorithm (specificity, 99.95%). The sensitivity of the serial algorithm was 99.96%, and specificity was 99.95%. None of the 250 concordant ELISA-negative sera in the algorithm that were randomly tested in Peptilav was positive; similarly, all of the 103 concordant ELISA-positive sera were confirmed by Western blot. The three-ELISA algorithm resulted in reagent cost-savings of at least 50% compared with the Peptilav-based algorithm.

CONCLUSION

These results suggest that a combination of ELISA using different principles or antigens in a serial or parallel algorithm is an efficient and cost-effective alternative to the standard algorithm in areas where HIV-1 and HIV-2 are prevalent.