2021
DOI: 10.3390/v13101900
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Hepatitis A: Epidemiology, High-Risk Groups, Prevention and Research on Antiviral Treatment

Abstract: The hepatitis A virus (HAV) is a leading cause of acute viral hepatitis worldwide. It is transmitted mainly by direct contact with patients who have been infected or by ingesting contaminated water or food. The virus is endemic in low-income countries where sanitary and sociodemographic conditions are poor. Paradoxically, improving sanitary conditions in these countries, which reduces the incidence of HAV infections, can lead to more severe disease in susceptible adults. The populations of developed countries … Show more

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Cited by 83 publications
(59 citation statements)
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References 120 publications
(129 reference statements)
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“…Immunizations are also important for reducing STI, especially sexually transmitted hepatitis viruses. Hepatitis A virus (HAV) outbreaks are sporadic but often involve MSM through oral-anal sexual activity among the unvaccinated (31). HAV vaccination should be offered to all MSM and persons engaging in sexual activities that facilitate transmission (32).…”
Section: Bowel Disordersmentioning
confidence: 99%
“…Immunizations are also important for reducing STI, especially sexually transmitted hepatitis viruses. Hepatitis A virus (HAV) outbreaks are sporadic but often involve MSM through oral-anal sexual activity among the unvaccinated (31). HAV vaccination should be offered to all MSM and persons engaging in sexual activities that facilitate transmission (32).…”
Section: Bowel Disordersmentioning
confidence: 99%
“…In most cases, the symptoms caused by infections with HAV and HEV are relatively mild, with most infected patients making a full recovery. People in low-income countries, where sanitary and conditions are poor, are easily infected with these two viruses [ 41 ]. On the other hand, HBV and HCV can cause both acute and chronic hepatitis.…”
Section: Hepatitis Viruses and Cholesterol Metabolismmentioning
confidence: 99%
“…Hepatitis A virus (HAV), which was first identified and characterized in 1973, is a non-enveloped virus of 27 nanometers in diameter that belongs to the family Picornaviridae and genus Hepatovirus. 11, 12 Molecular analysis of the HAV genome revealed a single positive-strand RNA of 7.5 kilobases (kb) in length with a single open reading frame (ORF) encoding a huge polyprotein. 13 There are two forms of the infectious virion: the quasi-enveloped virions commonly found in the blood, and naked virions usually excreted in the feces.…”
Section: Hepatitis a Virusmentioning
confidence: 99%
“…12, 13 On rare occasions, transmission could also happen through blood transfusion, sexual activities, and organ transplantation. 12 Moreover, there are specific risk groups reported to be more susceptible to hepatitis A particularly in developed countries, such as travelers to endemic countries, men who have sex with men, drug users, people with chronic liver disease, and HIV patients. 12, 19 HAV infection typically does not progress to chronicity.…”
Section: Hepatitis a Virusmentioning
confidence: 99%