Effects of COVID-19 or vaccines for SARS-COV-2 on sperm parameters: A systematic review and meta-analysis.

This systematic review and meta-analysis assessed the effects of SARS-Cov-2 and mRNA vaccines on male reproduction. We conducted a comprehensive search using terms such as "COVID-19," "vaccine," and "sperm parameters" on various electronic databases, including MEDLINE (PubMed), BVS (LILACS and others), Embase (Elsevier), and Cochrane Library. We included observational studies, including cohort, case-control, and cross-sectional studies.

Correspondence: semen parameters in men who recovered from covid-19 - a systematic review and meta-analysis.

A recent systematic review with meta-analysis performed by Tiwari et al. (Middle East Fertil Soc J 26:44, 2021) suggested that coronavirus disease 2019 (COVID-19) affects both semen parameters and sexual hormones. However, we have observed a few inconsistencies in their systematic review methods and their synthesis of results (meta-analysis), which would have impacted their results.

[Evaluation of the cellular immunity in patients coinfected by the hepatitis C virus and the human immunodeficiency virus].

Background: The immune activation provoked by the hepatitis C virus can be deleterious in patients with human immunodeficiency virus, favouring the destruction of CD4 cells. By the other side, the immune restoration observed after the onset of antiretroviral therapy can be partially obscured in patients with the hepatitis C virus.

Aim: The objective of the present study was to evaluate the impact of coinfection by hepatitis C virus and the human immunodeficiency virus in the cellular immunity.

Occult hepatitis B virus infection in patients with chronic liver disease due to hepatitis C virus and hepatocellular carcinoma in Brazil.

Background: The prevalence and consequences of occult HBV infection in patients with chronic liver disease by HCV remain unknown.

Aims: To evaluate the prevalence of occult HBV infection in a population of HCV-infected patients with hepatocellular carcinoma.

Methods: The serum samples were tested for HBV DNA by nested PCR and liver tissue analysis was carried out using the immunohistochemical technique of 66 HBsAg-negative patients: 26 patients with chronic hepatitis by HCV (group 1), 20 with hepatocellular carcinoma related to chronic infection by HCV (group 2) and 20 with negative viral markers for hepatitis B and C (control group).

[Steatosis and non-alcoholic steatohepatitis in patients with chronic hepatitis due to hepatitis C virus infection].

Background: [corrected] Hepatic steatosis is a common finding in patients with hepatitis C, mainly virus C genotype 3. Steatosis in these cases might be associated with antiviral treatment response and with prognosis of chronic hepatitis.

Aims: To determine the presence of steatosis and non-alcoholic steatohepatitis in chronic hepatitis C and its correlation with genotype and hepatic fibrosis.

[Ambulatorial prevalence of hepatitis B and C markers in patients with human immunodeficiency virus infection in a general hospital].

Background: Hepatitis B and C viruses and human immunodeficiency virus share the same route of transmission, and the prevalence of HBV and HCV infection in patients infected with HIV is greater than it is in the general population.

Aim: To determine the prevalence of hepatitis B and C markers in a population of patients with HIV as well as the risk factors involved.

Patients And Methods: From 5,870 registration forms of patients with HIV of an Infectology Unit, 587 were randomly selected.