An outbreak of serogroup C (ST-11) meningococcal disease in Tijuana, Mexico.

Background: Invasive meningococcal disease (IMD) has been reported to be endemic in children from Tijuana, Mexico and the risk of an outbreak was always a threat.

Objectives: To describe all clinical, epidemiological and microbiological features of a meningococcal outbreak that occurred in Tijuana, Mexico.

Methods: All cases with IMD were admitted at different emergency departments within the city and diagnosed by culture and agglutination tests.

The current situation of meningococcal disease in Latin America and recommendations for a new case definition from the Global Meningococcal Initiative.

The Global Meningococcal Initiative (GMI) is an international group of scientists and clinicians with expertise in meningococcal disease (MD). It promotes MD prevention through education and research. Given geographic differences in disease epidemiology, prevention strategies (e.

Streptococcus pneumoniae serotypes isolated from the middle ear of Mexican children diagnosed with acute otitis media.

Objective: The aim of this study was to identify the etiology and the serotypes of S. pneumoniae (Sp) in Mexican children with acute otitis media (AOM).

Materials And Methods: The study includessamples frompatientsdiagnosed with AOM at the Federico Gomez Children's Hospital of Mexico (2002-2003),with positive culture for Sp bacteriologically confirmed in middle ear fluid obtained by tympanocentesis.

[Streptococcus pneumoniae serotype replacement in nasopharyngeal colonization in children vaccinated with PCV7 in Mexico].

Objective: To assess the impact of pneumococcal conjugate vaccine (PCV7) immunization on pneumococcal nasopharyngeal colonization with S. pneumoniae (SPN).

Material And Methods: We studied two groups with different vaccination schedules, group I (2-6 months of age) 3+1 and group II (7 -11 months) 2+1, with a booster at 15 months.

Prevalence of Neisseria meningitidis carriers in children under five years of age and teenagers in certain populations of Mexico City.

Objective: To carry out a pilot study to discover the frequency of colonization in healthy children under five years old and teenagers, as well as the distribution of the different N. meningitidis serogroups isolated from nasopharyngeal samples collected from the population under study.

Material And Methods: The population included youth between 15 and 19 years old living in social rehabilitation centers (SRC) and university teenagers (UT) as well as children under the age of five attending day care centers (DCC) in Mexico City.

Streptococcus pneumoniae isolates in healthy children attending day-care centers in 12 states in Mexico.

Objective: The aim of this study was to determine the prevalence of asymptomatic nasopharyngeal carriage of Streptococcus pneumoniae, which is a major factor in the transmission of this bacterium.

Material And Methods: Nasopharyngeal cultures were performed on children attending 32 day-care centers in 12 states in Mexico.

Results: Streptococcus pneumoniae was isolated from the nasopharynx of 829 out of 2,777(29.