Presumed Protective Role for Anti-Hepatitis B Virus Antibodies Against COVID-19 Severe Cases: A Clinical Study Confirming in silico Hypothesis.

Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for COVID-19 disease which is known to have a broad clinical spectrum, from asymptomatic to critical presentation leading to death. Many researchers have investigated the factors impacting the course of the disease. Our previous in silico study suggested a possible protective effect of Hepatitis B, Tetanus and Measles vaccines against COVID-19. In continuity, we conducted a cross-sectional clinical study in order to confirm our in silico assumptions regarding the HBs-Ag antibodies. Methods: A representative sex- and age-matched sample of patients with confirmed COVID-19 was selected (n = 340). All clinical presentations were equally represented. Using an ELISA test, each patient benefited of a serology for the detection and measurement of the anti-HBs specific IgG antibodies. The obtained results allowed determining the different correlations between these antibody titers and the disease severity. The R® software and the MedCalc® software served to calculate the Spearman's coefficient of rank correlation (rho) for the obtained titers per severity group as well as the different other calculations and figure representations. Results: A significant positive correlation was found with the anti-HBs titers (rho = 0.107; p = 0.04). High anti-HBs titers were significantly associated with the mild presentation of COVID-19. A significant difference was found between the obtained titers per severity class (chi-2 test, p = 0.03). Discussion/Conclusion: Our findings demonstrated that anti-HBs titers were significantly higher for patients having mild COVID-19 presentations. We presume that being immunized against the HB may play a protective role in the course of the disease. Our study provided more key elements in understanding the disparity of the clinical spectrum among regions.

Ocular manifestations of people living with HIV in Tunisia.

BACKGROUND: Ocular involvement is a common complication of human immunodeficiency virus (HIV). Knowledge about this topic in Tunisia is limited. OBJECTIVE: To investigate ophthalmic manifestations in patients living with HIV in Tunisia. METHOD: This was an observational study, performed between January 2007 and December 2016. We included patients with ocular disorders related to HIV. The data were recorded retrospectively from chart review. RESULTS: Amongst 98 people living with HIV (PLWH), 36 participants (55 eyes) had ocular manifestations. The mean age was 32.2 ± 5.6 years. Twenty-four patients were men and 12 were women. The mean value of CD4+ T-cell count was 156.5 ± 4.2 cells/µL. Bilateral lesions were found in 19 eyes. Best corrected visual acuity was better than 6/12 in 36 eyes. The most common ocular finding was dry eye syndrome (22%), cotton-wool spots (20%) and retinal haemorrhage (16%) followed by cytomegalovirus (CMV) retinitis (9%), anterior uveitis (7%), toxoplasmosis (4%) and tuberculosis retinochoroiditis (7%) Herpetic keratitis (5%), Herpes zoster ophthalmicus (2%) and syphilitic chorioretinitis (2%). Papilledema was found in three eyes (5%). Panuveitis was observed in four eyes (7%): three of them were associated with chorioretinal toxoplasmosis, syphilitic chorioretinitis and CMV retinitis. The fourth was attributable to immune recovery uveitis. A CD4+ T-cell count of ≤ 200 cells/µL was found to be an independent risk factor for developing posterior segment manifestations. CONCLUSION: Various ophthalmic manifestations were observed in PLWH. The most common lesion was retinopathy. Ocular involvement can be serious leading to poor visual prognosis, which requires close collaboration between the ophthalmologist and infectious disease physician.

Cerebro-rhino-orbital mucormycosis and aspergillosis coinfection in a patient with diabetes mellitus: A case report.

Opportunistic fungal infections are life-threatening conditions with a high rate of morality, mostly occurring in immunocompromised hosts. We reported the case of mixed mold infection in a 69 year-old patient with latent diabetes mellitus. She was initially admitted for right orbital cellulitis. Cerebro-rhino-orbital mucormycosis and aspergillosis coinfection was diagnosed from mycological testing and histology after nasal biopsy sample. The patient received amphotericin B deoxycholate then voriconazole combined to surgical debridement with a favorable outcome.

[Epidemio-clinical features of genital tuberculosis among Tunisian women: a series of 47 cases]. / Caractéristiques épidémio-cliniques de la tuberculose génitale chez la femme tunisienne: une série de 47 cas.

This study aimed to identify the epidemio-clinic, diagnostic, therapeutic and evolutionary features of genital tuberculosis (GT) among Tunisian women. We conducted a retrospective, descriptive study in the Department of Infectious Diseases at the La Rabta Hospital, Tunisia, over a period of 15 and a half years (January 2000 - June 2014). All patients hospitalized for genital TB were included in the study. The study focused on 47 cases. The average age of patients was 42.2 years. Eighteen women were from rural areas. Tuberculous contact was found in five cases. In all cases, the onset was insidious. Twenty-three patients showed one or several signs of TB infection. Tuberculin intradermal reaction (IDR) test was performed in 35 women (74.8%), it was positive in 26 cases (74%). Thirty-nine patients (83%) had undergone radiological examination using abdomino-pelvis ultrasound and/or CT scan. Diagnostic coelioscopy was performed in 37 cases (75.5%). Anatomopathological examination helped to confirm the diagnosis of GT in 42 cases (89.3%), showing epithelioid and giant-cell granuloma. We identified 21 cases of isolated GT, the remaining 26 cases had peritoneal involvement. All patients received specific antibiotic therapy combining isoniazid, rifampicin, pyrazinamide and ethamubutol with an average treatment duration of 12 months. No patient received corticosteroids or secondary surgery. Patients' outcome was favorable in 39 cases, 8 patients were lost to follow-up. Genital tuberculosis is rare, representing only 0.5% of extra-pulmonary tuberculosis, but it accounts for a high prevalence of clinical polymorphism. Diagnostic confirmation is difficult and it is based on bacteriological and/or histological examinations. Diagnosis should be suspected in patients with chronic abdominopelvic symptoms, in women with infertility associated with suggestive epidemioclinical manifestations.

Molecular diagnosis of Rickettsia infection in patients from Tunisia.

Diagnosis of rickettsioses had largely benefited from the development of molecular techniques. Unfortunately, in Tunisia, despite the large number of rickettsial cases registered every year, the Rickettsia species remain unidentified. In this study, we aimed to detect the Rickettsia species in clinical samples using molecular tests. A study was established to analyze skin biopsies, cutaneous swabs, and cerebrospinal fluid samples taken from clinically suspected patients to have rickettsial infection. Two molecular techniques were used to detect Rickettsia DNA: quantitative real time PCR (qPCR) and reverse line blot test (RLB). An analysis of the RLB hybridization assay results revealed the presence of Rickettsia DNA in skin biopsies (40.6%) and swabs (46.7%). Rickettsia conorii was the most prevalent identified species among tested samples. Other species of interest include Rickettsia typhi and Rickettsia massiliae. Using qPCR positivity rates in skin biopsies was 63.7% against 80% in swabs. R. conorii was the most frequently detected species, followed by R. typhi. The agreement between the two techniques was 68.6% (kappa=0.33). Molecular tests, especially using specific probes qPCR, allow for a rapid, better and confident diagnosis in clinical practice. They improve the survey of Mediterranean spotted fever which is considered to be the most important rickettsial infection in humans in Tunisia.

Serological and molecular detection of Toscana and other Phleboviruses in patients and sandflies in Tunisia.

BACKGROUND: Our aim is to detect the infection by Toscana virus (TOSV) and other Phleboviruses in the sera and cerebro-spinal fluid (CSF) of patients with meningitis in Tunisia. We examined various species of phlebotomus present in Tunisia to determine whether or not a direct relationship exists between cases of meningitis and the viruses circulating in the insect vectors. METHODS: Patients with the meningeal syndrome were tested for anti-TOSV IgM and IgG using an indirect Enzyme-Linked Immunosorbent Assay (ELISA) and for the presence of TOSV and other Phleboviruses using a RT-PCR test. RESULTS: Of 263 patients were tested using ELISA of which 12.16% (n = 32/263) were IgM positive for anti TOSV. Of these 32 patients, 78% (n = 25/32) were IgG positive. 12.86% (n = 18/140) of the CSF samples tested by RT-PCR were positive for the Toscana virus. CONCLUSIONS: This study confirms, for the first time, that TOSV is involved in a neurological disorder in North Africa. The incidence of this involvement in Tunisia conforms with observations made in other Mediterranean countries. Moreover, for the first time, a molecular approach was used to detect SFSV in a Tunisian patient displaying neurological symptoms.

[Upper urinary tract infections in adults: about 261 episodes]. / Infections urinaires hautes de l'adulte: à propos de 261 épisodes.

BACKGROUND: Upper urinary tract infections are frequent. Escherichia coli is the main pathogen identified from community acquired infections. AIM: We aim to study epidemiologic, clinical and bacterial features of this infection. METHODS: We identified 261 episodes that occurred in 241 patients. They were 213 females and 48 males aged of 48.75 years. Enterobacteriaceae were the main pathogens isolated in 93.5%: E. coli in 73.3% and Klebsiella pneumoniae in 15.3%. E. coli sensitivity was of 30% for amoxicillin, 98% for cefotaxim, 96% for gentamicin, 90% for ciprofloxacin and 56% for co-trimoxazole. Anterior antibiotic use was associated with low E. coli sensitivity mainly with fluoroquinolones (96 vs 77%) and co-trimoxazole (62 vs 43%). This enhances the role of antibiotic pressure on the resistance emergence. CONCLUSION: the reasonable use of antibiotics is necessary to limit resistance extent.

Mucormycosis: four case reports.

INTRODUCTION: Mucormycosis is a rare and invasive fungal infection, but frequently fatal when it occurs. It commonly affects patients with diabetes mellitus. The aim of this study is to assess the clinical presentation, radiological findings, management and prognosis of mucormycosis. METHODS: This retrospective study was conducted in the department of infectious diseases of Rabta hospital between January 1988 and December 2004 and included patients hospitalized for mucormycosis confirmed by mycological and/or histological findings. RESULTS: the study is about four diabetic patients with mucormycosis (3 men and a woman). Three of them had diabetic ketoacidosis at the time of diagnosis. The infection was sinusal in 2 cases and rhinocerebral in the the other two cases. Treatment consisted in systemic amphotericin B combined with surgical debridement in 3 cases. A fatal outcome was noted in 2 cases. CONCLUSION: Mucormycosis remains a severe infectious disease in diabetic patients. Early diagnosis and treatment is mandatory for a successful management of this infection.

Seroepidemiology of HCV-HIV coinfection in Tunisia.

AIM: To determine the prevalence of antibodies to hepatitis C virus (HCV) in a cohort of patients infected with human immunodeficiency virus 1 (HIV-1) and to compare risk factors. METHODS: Multicenter retrospective study from infectious diseases department in Tunisia. We examined sera from HIV patients followed in these centers. Diagnosis of HCV infection was based on third generation enzyme-linked immunosorbent assay (ELISA) test. RESULTS: 362 HIV-1 patients were included in the study. The mean age was 35,5 years. 272 patients (75.13%) were male. Sexual transmission of HIV was the main risk factor (56.3%). 144 patients (39.7%) had antibodies against HCV, mainly in patients with history of intravenous drug abuse (78.4%). Quantitative evaluation of hepatitis C virus RNA was done only in 3 patients. CONCLUSION: HCV-HIV coinfection in tunisian patients occurs frequently, due to the same ways of transmission. More studies are needed to focus on sexual transmission of hepatitis C virus in order to prevent such infections rather than interferon-based therapies.

[AIDS-associated Kaposi's sarcoma: 22 cases]. / Maladie de Kaposi associee au SIDA: etude de 22 cas.

BACKGROUND: Kaposi's sarcoma is the most common acquired immune deficiency syndrome (AIDS)-associated malignancy. Our aim was to analyse the epidemiological, clinical, therapeutic findings in AIDS patients with Kaposi's sarcoma. METHODS: This was a retrospective chart review of AIDS patients with Kaposi's sarcoma diagnosed between 1991 and 2005. Epidemiological data, the stage of human immunodeficiency virus's (HIV) infection, clinical characteristics of Kaposi's sarcoma, treatment rendered and outcome were collected. The search of HHV8 was not done. RESULTS: Twenty two patients were included. They were 17 men and 5 females (sex-ratio=3.4/ 1) with a mean age of 33.6 years at the diagnosis of HIV infection. The Kaposi's sarcoma appeared after a period varying between 0 and 10 years. The Kaposi's sarcoma uncovered the infection in 5 cases. There were 6 homosexual men. The mean rate of CD4 was 216 21/mm3 at the diagnosis of Kaposi's sarcoma. All patients had skin lesions. Mucocutaneous lesions were isolated in 12 cases and associated with visceral involvement in 10 cases; lung (10 cases), gastrointestinal tract (5 cases), lymphadenopathy (5 cases), liver (4 cases), spleen (2 cases). Antiretroviral therapy was prescribed for 13 patients. Six patients received chemotherapy and 3 others radiotherapy. Outcome was favourable in 4 cases with a partial improvement of the skin lesions in 3 cases and a complete regression in 1 case. Twelve patients died. CONCLUSION: AIDS associated Kaposi's sarcoma is a severe condition because of visceral localisations and the field of immunodeficiency. It requires a precocious diagnosis and collaboration. The identification of HHV8 in the aetiopathogenic mechanism of Kaposi's sarcoma can lead to the development new therapeutic approaches.

[Transverse myelitis revealing Hodgkin disease]. / Myélite transverse révélant une maladie de Hodgkin.

INTRODUCTION: Neurological complications during Hodgkin disease are rare and sometimes difficult to diagnose. We report the case of a patient with transverse myelitis. CASE: This 32-year-old man was hospitalized on month after onset of febrile spastic paraplegia, which was accompanied by progressive deterioration of his general condition. Examination revealed a febrile, conscious patient, with abolition of the lower-limb tendon reflexes, bilateral Babinski signs, and sensitivity at D6-D7. We also noted hepatosplenomegaly, but no peripheral adenopathies. Laboratory reports indicated bicytopenia, a major inflammatory syndrome and hepatic cytolysis. The computed tomography examination of thorax and abdomen showed swelling in deep lymph nodes and the brain MRI showed what appeared to be transverse myelitis. The brainstem biopsy was normal; the hepatic biopsy showed liver infiltration by Sternberg cells. The patient died rapidly, before treatment could begin. DISCUSSION: The variable neurological events observed during Hodgkin disease may serve to reveal this disease. Their association with a tumor suggests this diagnosis even when the neurological signs are nonspecific. They may affect either the brain or the brainstem. Diagnostic certainty requires histologic analysis, and prognosis depends on early diagnosis and management.

[Effect of triple antiretroviral therapy on Tunisian AIDS profile: study of 139 cases]. / Impact de la trithérapie anti-retrovirale sur le profil evolutif du sideen Tunisien: etude de 139 cas.

We report a retrospective study to estimate highly active antiretroviral therapy (HAART) effect in 139 HIV infected patients. Four criteria are studied: prevalence of opportunistic infections, CD4 cell count evolution, viral load progression and mortality. Gastrointestinal side effects are the most common clinical adverse reaction (61.1 percent), and hematological side effects are the most common biological adverse reaction (61.2 percent). During the 22.8 months (3 months to 6 years) follow-up average period, CD4 cell counts remained above 500 per cubic millimeter in only 25.8 percent of cases, while 63.5 percent of patients had a viral load below 400 copies per milliliter. During the study on patients receiving HAART, opportunistic infections appeared in 17.3 percent of cases (24 cases) and mortality in 6.4 percent of cases.

[AIDS in Tunisian women. Study of 92 cases]. / Le sida chez la femme tunisienne. Etude de 92 cas.

The authors report a retrospective study about 92 cases of HIV-1 infections among adult tunisian women hospitalised or consulting in the department of infectious diseases at Rabta hospital over a period of 15 years and 6 months. The middle age is 33.2 years. 64.1% of patients are married, and the conjoint is HIV-1 positive in 84.1% of cases. The route of transmission is sexual in 75%, parenteral in 22.8% and unknown in 2.2%. According to CD4 level and clinical symptoms, patients are at AIDS stage in 75.5%. The main clinical symptoms are: oral candidiasis in 92.4%, diarrhea in 54.3%, pneumocystis carinii pneumoniae in 11.9%, cerebral toxoplasmosis in 10.9%, septicemia caused particularly by salmonella in 9.7%, tuberculosis in 6.7%, cryptococcal meningitis in 4.3% an Kaposi's sarcoma in 3.2%. Mother to child HIV transmission is found in 33.3%, and the mortality is noted in 43.5% of cases.