Hepatitis C Virus in Arab World: A State of Concern

Department of Medical Microbiology & Immunology, Tripoli Medical Centre, Faculty of Medicine Tripoli, PO Box 82668, Tripoli, Libya.
The Scientific World Journal (Impact Factor: 1.73). 05/2012; 2012(17):719494. DOI: 10.1100/2012/719494
Source: PubMed


Hepatitis C virus has been considered to be one of the most important devastating causes of chronic hepatitis, cirrhosis, and hepatic cellular carcinoma. The prevalence of such virus varies greatly over the world. Arab world has a unique geography and consists over nineteen countries who share the same heritage and customs and do speak the same language. In this area, the epidemiology of hepatitis C is not well understandable. Hepatitis C virus was found to be endemic in Arabia. The serostatus of such virus was found to be variable among these countries with uniform patterns of genotypes. Such prevalence varies tremendously according to the risk factors involved. Blood and blood products, haemodialysis, intravenous, and percutaneous drug users, and occupational, habitual, and social behavior were found to be the important factors involved. Hepatitis C will have major social, economic, and even political burdens on such young and dynamic societies. Thus, strategies and clear policy of intervention are urgently needed to combat the consequences of HCV both regionally and at state level of each country.

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Available from: Mohamed A Daw, Feb 17, 2015
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    • "Hepatitis C virus is considered to be one of the most important devastating causes of chronic hepatitis, cirrhosis, and hepatic cellular carcinoma [22]. In viral infection, TLR stimulation presents a double-edged sword: it is indeed essential for triggering innate and adaptive immunity against pathogens, but TLR over-activation is known to contribute to the pathogenesis of chronic inflammatory and infectious diseases. "
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    ABSTRACT: Background Hepatitis C virus is considered to be one of the most important devastating causes of chronic hepatitis, cirrhosis, and hepatic cellular carcinoma. Toll-like receptor 7 (TLR7) is a pathogen-recognition receptor that is expressed on innate immune cells. It recognizes viral RNA which induces its activation with a subsequent increase in IFN-α transcription. It has been postulated that HCV may cause down regulation of these receptors as one of immune evading mechanisms that participate in viral persistence. The aim of the work Was to investigate the expression of TLR7 in peripheral blood of patients with chronic HCV infections and patients with HCC, comparing it with normal individuals, and correlating it with both serum levels of IFN-α and viral load. Results The results of this study showed a significant decrease in TLR7 expression in patients with chronic HCV and no detection at all in patients with HCC, in addition a significant negative correlation was observed between levels of TLR7expression and interferon α when compared to viral load. Conclusion Down regulation of TLR7 expression in HCV and HCC patients may contribute to the decrease of IFN-α and increase in viral load. These results raise the possibility that by targeting TLR7 with high affinity pharmacological stimulants may be able to control HCV infection by induction of IFN-α and direct activation of antiviral mechanisms in hepatocytes. Additionally, they provide insight about the potential use of TLR7 as a new set of molecular markers for prognosis and outcomes of chronic HCV infection and HCC.
    Full-text · Article · Aug 2014 · Egyptian Journal of Medical Human Genetics
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    • "The Arab world is a very large and vast region, encompassing the Arabian Peninsula, Sham region, Arabian Nile region, and the North African region, is no exception to this epidemic and is estimated to harbour 25 million infected individuals and an average prevalence rate of 3.5%. Illegal drug use along with sexual activity outside of wedlock fall into the boat of taboo topics resulting in that investigators having shunned this research area until recent years (Daw & Dau) [6]. Further complicating the matter is the low level of government funding for epidemiological research activities, ultimately resulting in an unconfirmed true prevalence rate for most countries in this region. "
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    ABSTRACT: Hepatitis C virus is a persistent epidemiological problem, with an estimated 170 million individuals infected worldwide, and the leading cause of asymptomatic chronic infection, liver cirrhosis and hepatocellular carcinoma. Injection drug users (IDUs) have the highest seroprevalence as compared to chronic hemodialysis and transfusion patients, and this cohort remains the most under-studied high-risk group in North Africa to date. This study first sought to characterize the demographic, epidemiological, and genotypic profile of a total sample size of 211 chronically-infected IDUs living in the Tangier region of Northern Morocco, and secondly to contrast this to other chronically-infected patients, in order to uncover possible discrepancies. The general 'profile' of local IDUs marks a stark contrast to chronically-infected HCV Moroccan patients, other African countries, and neighboring European countries. The majority of Moroccan drug users were found to be middle-aged and celibate. A relatively high seroprevalence was found among drug users (60%), and this increased with age. The majority of drug users shared their needles and this hold implications for transmission, as seropositive status was significantly different between those users that shared vs. those that did not share their needles. In addition, IDUs exhibited genotypes 1a and 3a predominantly, as compared to the predominant 1b and 2a/2c genotypes found in chronically HCV-infected patients. The IDU genotypic profile closely matches the one in other European countries (Portugal, Spain, France, and Italy), which are invariably speculated as the potential source of currently-circulating genotypes in Moroccan IDUs. These findings have implications for disease prevention, transmission and treatment, as this distinct IDU subgroup cannot be collectively pooled along with other HCV-positive high-risk groups. Local government, practitioners, and health institutions should take this into account when treating, prescribing antiviral therapy, and designing preventative public health campaigns.
    Full-text · Article · Mar 2014 · Virology Journal
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    • "African countries have among the highest prevalence rates of HCV in the world, ranging from 1 to 26% [10,11]. More than 28 million people are chronically infected with HCV in this continent, and it is difficult to speculate about current and future trends [3,12]. In Libya, one study reported that the prevalence of HCV among different populations varied according to the risk factor involved [13]. "
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    ABSTRACT: Libya is one of the largest countries in Africa and has the longest coast in the Mediterranean basin facing southern Europe. High rates of prevalence of viral hepatitis have been observed in various regions in Africa, but the prevalence in Libya is not well documented. We report on a large-scale nationwide study that evaluated the epidemiology of hepatitis B and hepatitis C in Libya and assessed the risk factors involved. A cross-sectional study was carried out in 2008 on 65,761 individuals all over Libya. The country was divided into 12 regions according to the population density and sampling within each region was carried out under the supervision of the National Centre for Prevention of Infectious Diseases. Serum samples were collected from both males and females of all ages in both urban and rural areas and tested for HBsAg for hepatitis B and anti-HCV antibody for hepatitis C. Prevalence rates were determined in regions and in different groups and correlated with different demographic and risk factors involved in the spread of these viruses. The prevalence of hepatitis B and hepatitis C viruses varied regionally across the country. The overall prevalence of hepatitis B was 2.2% (95% CI 2.1%-2.3%) and was higher among males than females (1.4:1.0). Hepatitis C virus (HCV) prevalence was 1.2% (95% CI 1.1-1.3) and it increased gradually after the age of 30 years (0.7-0.9% for < 30 years; 3.6% for >= 60 years). Prevalence of HBsAg was 0.8-0.9% below the age of 10 years, and higher but similar in older age groups (2.3-2.7%). There was an association between literacy and prevalence of hepatitis, particularly for HCV. Hospital admission, surgical operation, blood transfusion, and intravenous drug use were the main risk factors, and they were associated independently with a higher prevalence rate of viral hepatitis. Libya may be considered an area of low-intermediate endemicity for hepatitis B virus infection, with lower rates in young age groups, and an area of low endemicity for hepatitis C. The prevalence of hepatitis B and C across Libya is not homogeneous, with indications of the effect of the higher rates in some neighbouring countries. Libya should adopt full coverage national plans and guidelines to face the future consequences of viral hepatitis, particularly hepatitis C virus.
    Full-text · Article · Jan 2014 · BMC Infectious Diseases
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