Evidence for positive selection of hepatitis A virus antigenic variants in vaccinated men-having-sex-with men patients: Implications for immunization policies.

Background: A huge outbreak in the men-having-sex-with-men (MSM) has hit Europe during the years 2016-2018. Outbreak control has been hampered by vaccine shortages in many countries, and to minimize their impact, reduction of antigen doses has been implemented. However, these measures may have consequences on the evolution of hepatitis A virus (HAV), leading to the emergence of antigenic variants.

The decline of the incidence of meningococcal disease in Barcelona between 1988 and 2015: the influence of the vaccine against serogroup C.

Introduction And Objective: The purpose of this study was to describe the evolution of meningococcal disease (MD) in the city of Barcelona between 1988 and 2015 and to assess the impact of the vaccine against serogroup C.

Materials And Methodology: The evolution of MD and by serogroup was analysed using the information included in the mandatory notification diseases registry. Incidences of all serogroups between the periods of before and after the implementation of the serogroup C vaccine in 2000 were compared.

Evolution of acute hepatitis C virus infection in a large European city: Trends and new patterns.

The aims of this study were to describe the evolution of acute hepatitis C virus (HCV) infections since 2004 and to determine its associated factors. Acute HCV infections diagnosed in Barcelona from 2004 to 2015 were included. Incidence ratios (IR) were then estimated for sex and age groups.

Street Cleaning Trucks as Potential Sources of Legionella pneumophila.

In 2015, Legionnaires' disease was diagnosed in a street cleaning worker. We found Legionella pneumophila serogroup 1 in the water and internal foam from the tanks of 2 trucks used by the worker during the incubation period. The internal foam was removed, and a Legionella prevention program was implemented.

Effectiveness of hepatitis A vaccination as post-exposure prophylaxis.

Hepatitis A (HA) has been a vaccine-preventable disease since 1995. In Catalonia, a universal combined hepatitis A+B vaccination program of preadolescents was initiated at the end of 1998. However, outbreaks are reported each year and post-exposure prophylaxis (PEP) with hepatitis A virus (HAV) vaccine or immunoglobulin (IG) is recommended to avoid cases.

Changes in the epidemiology of hepatitis A outbreaks 13 years after the introduction of a mass vaccination program.

A hepatitis A+B vaccine vaccination program of 12-year-olds was introduced in Catalonia in 1998. The aim of this study was to investigate the evolution of hepatitis A outbreaks in Catalonia and estimate the preventable fraction of cases associated with outbreaks as a measure of the impact of the vaccination program. Hepatitis A outbreaks reported to the Health Department between 1991 and 2012 were analyzed.

Can we rely on the antiretroviral treatment as the only means for human immunodeficiency virusprevention? A Public Health perspective.

The evidence that supports the preventive effect of combination antiretroviral treatment (cART) in HIV sexual transmission suggested the so-called 'treatment as prevention' (TAP) strategy as a promising tool for slowing down HIV transmission. As the messages and attitudes towards condom use in the context of TAP appear to be somehow confusing, the aim here is to assess whether relying on cART alone to prevent HIV transmission can currently be recommended from the Public Health perspective. A review is made of the literature on the effects of TAP strategy on HIV transmission and the epidemiology of other sexual transmitted infections (STIs) in the cART era, and recommendations from Public Health institutions on the TAP as of February 2014.

Evaluation of reported cases of pertussis: epidemiological study in a large city in Spain.

We retrospectively analysed the incidence rate of reported cases of pertussis in Barcelona during 2009-2012 according to age, sex, type of medical centre and vaccination status. We included 748 confirmed or suspected cases, 613 (82.0 %) of which were confirmed by laboratory testing and the remaining 135 (18.

[Norovirus outbreaks in geriatric centers: importance of an early detection].

Background And Objectives: Acute gastroenteritis (AGE) outbreaks of norovirus (NV) occur frequently in nursing homes. Gastrointestinal disorders and degree of dependence of residents complicate early detection and implementation of control measures. Our study's aim was to determine the incidence of NV in elderly care centers, transmission mechanisms and circulating genotypes.

Person-to-person transmission of norovirus resulting in an outbreak of acute gastroenteritis at a summer camp.

Background: A significant proportion of norovirus (NV) gastroenteritis outbreaks described in the Spanish literature have been because of contaminated food or water.

Aim: This study describes an outbreak of acute gastroenteritis because of NV in which there was person-to-person transmission.

Materials And Methods: A retrospective cohort study was carried out; we established the case definition for primary and secondary cases.

Group A β-hemolytic streptococcal pharyngotonsillitis outbreak.

The aim was to describe an outbreak of group A β-hemolytic streptococcal pharyngotonsillitis in health care professionals. This is a cross-sectional descriptive study of 17 clients who dined at the same table in a restaurant in Barcelona in July 2012. The frequency, timing and severity of symptoms were analyzed, as were demographic variables and others concerning the food ingested.

[Impact of the 28/2005 Spanish smoking law on second-hand smoke exposure in Barcelona].

Objective: To assess the impact of the 28/2005 Spanish smoking law on exposure to second-hand smoke (SHS) in Barcelona.

Methods: We performed a pre-post evaluation study. Two cross-sectional surveys were compared.