ABSTRACT
Streptococcus pneumoniae, Haemophilus influenzae, and Neisseria meningitidis, which are typically transmitted via respiratory droplets, are leading causes of invasive diseases, including bacteraemic pneumonia and meningitis, and of secondary infections subsequent to post-viral respiratory disease. The aim of this study was to investigate the incidence of invasive disease due to these pathogens during the early months of the COVID-19 pandemic. Methods In this prospective analysis of surveillance data, laboratories in 26 countries and territories across six continents submitted data on cases of invasive disease due to S pneumoniae, H influenzae, and N meningitidis from Jan 1, 2018, to May, 31, 2020, as part of the Invasive Respiratory Infection Surveillance (IRIS) Initiative. Numbers of weekly cases in 2020 were compared with corresponding data for 2018 and 2019. Data for invasive disease due to Streptococcus agalactiae, a non-respiratory pathogen, were collected from nine laboratories for comparison. The stringency of COVID-19 containment measures was quantified using the Oxford COVID-19 Government Response Tracker. Changes in population movements were assessed using Google COVID-19 Community Mobility Reports. Interrupted time-series modelling quantified changes in the incidence of invasive disease due to S pneumoniae, H influenzae, and N meningitidis in 2020 relative to when containment measures were imposed. Findings 27 laboratories from 26 countries and territories submitted data to the IRIS Initiative for S pneumoniae (62â434 total cases), 24 laboratories from 24 countries submitted data for H influenzae (7796 total cases), and 21 laboratories from 21 countries submitted data for N meningitidis (5877 total cases). All countries and territories had experienced a significant and sustained reduction in invasive diseases due to S pneumoniae, H influenzae, and N meningitidis in early 2020 (Jan 1 to May 31, 2020), coinciding with the introduction of COVID-19 containment measures in each country. By contrast, no significant changes in the incidence of invasive S agalactiae infections were observed. Similar trends were observed across most countries and territories despite differing stringency in COVID-19 control policies. The incidence of reported S pneumoniae infections decreased by 68% at 4 weeks (incidence rate ratio 0·32 [95% CI 0·270·37]) and 82% at 8 weeks (0·18 [0·140·23]) following the week in which significant changes in population movements were recorded. Interpretation The introduction of COVID-19 containment policies and public information campaigns likely reduced transmission of S pneumoniae, H influenzae, and N meningitidis, leading to a significant reduction in life-threatening invasive diseases in many countries worldwide. Funding Wellcome Trust (UK), Robert Koch Institute (Germany), Federal Ministry of Health (Germany), Pfizer, Merck, Health Protection Surveillance Centre (Ireland), SpID-Net project (Ireland), European Centre for Disease Prevention and Control (European Union), Horizon 2020 (European Commission), Ministry of Health (Poland), National Programme of Antibiotic Protection (Poland), Ministry of Science and Higher Education (Poland), Agencia de Salut Pública de Catalunya (Spain), Sant Joan de Deu Foundation (Spain), Knut and Alice Wallenberg Foundation (Sweden), Swedish Research Council (Sweden), Region Stockholm (Sweden), Federal Office of Public Health of Switzerland (Switzerland), and French Public Health Agency (France).
Subject(s)
Residence Characteristics , Haemophilus influenzae , Disease Prevention , Pandemics , Coinfection , Anti-Bacterial AgentsABSTRACT
Serum antibodies specific for the capsular polysaccharides of Streptococcus pneumoniae provide protection against invasive pneumococcal infection. In Brazil, this vaccine has been used for people over 65 years with clinical risk to develop pneumococcal infection since 1999. We evaluated the immune response of 102 elderly subjects (75.5 percent females and 24.5 percent males) with a mean age of 71 years, and 19 young healthy adults (63.2 percent females and 36.8 percent males) with a mean age of 27 years. The elderly study group consisted of outpatients who received follow-up care in the Geriatric Department of General Hospital, Faculty of Medicine, University of São Paulo. None had acute illness at the time of vaccination. Both groups were immunized with one intra-deltoid injection with 0.5 ml of a 23-valent pneumococcal polysaccharide vaccine. The total IgG specific antibody concentrations to capsular polysaccharides 1, 3, 5, 6B, 8, and 14 were determined against pre- and 1-month post-vaccination sera. All samples were analyzed according to the second-generation pneumococcal polysaccharide ELISA protocol. We observed that the pneumococcal polysaccharide vaccine evoked consistent antibody increase for serotypes 1, 5, 6B, 8, and 14 (geometric mean concentration increase of 2.46 in the elderly and 2.84 in the young adults). Otherwise, we observed no increase in antibody concentration for serotype 3 in both groups.
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Pneumococcal Infections/prevention & control , Pneumococcal Vaccines/immunology , Streptococcus pneumoniae/immunology , Age Factors , Antibodies, Bacterial/immunology , Brazil , Case-Control Studies , Enzyme-Linked Immunosorbent Assay , Immunoglobulin G/immunologyABSTRACT
O reconhecimento da Febre Purpurica Brasileira (FPB), em 1984, originou uma serie de estudos que revelaram uma correlacao desta doenca com conjuntivites causadas por Haemophilus aegyptius. A associacao do aumento de conjuntivites em criancas e a maior densidade populacional de cloropideos do genero Hippelates ja havia sido verificada desde o seculo passado. Este fenomeno esta relacionado ao tropismo que estes insetos apresentam pelos olhos, secrecoes e feridas de onde se alimentam....
Subject(s)
Humans , Infant , Child, Preschool , Child , Adolescent , Haemophilus/isolation & purification , Haemophilus Infections/complications , Conjunctivitis, Bacterial/etiology , Conjunctivitis, Bacterial/microbiology , Haemophilus/classificationABSTRACT
Brazilian purpuric fever (BPF) is caused by invasive strains of Haemophilus aegyptius (H. influenzae biogroup aegyptius, Hae). These strains were differentiated from Hae strains associated only with conjunctivitis (non-invasive Hae strains) through specific molecular markers. Complement-depleted infant rat model was used to study the invasive and non-invasive Hae strains to compare their virulence potential. Inoculating 10(5) bacteria in the rats, the invasive strains caused 80 to 100 bacteremia and the intensity of bacteremia was 10(2.5 +/- 0.49) to > 10(4.69) cfu/ml of blood. Using the same infectious dose, the non-invasive strains did not cause frequent bacteremia (0 to 50) and the intensity was 0 to 10(3.69 +/- 0.53) cfu/ml of blood. The infectious doses able to cause 50 of bacteremia in the rats (BD 50) varied from < 10(3) to 10(4.2) bacteria for the invasive strains, whereas the BD 50 were 10(6.2) to > 10(7.3) bacteria for non-invasive strains. Passive immunization using antisera to invasive strains protected rats against bacteremia caused by homologous strains, but not by heterologous strain. By comparing the bacteremia caused by Hae and bacteremia caused by H. influenzae b (Eagan strain, Hib), it was demonstrated that Hib had higher virulence potential. This animal model was useful to clarify the virulence potential of invasive Hae strains.
Subject(s)
Animals , Male , Female , Rats , Conjunctivitis, Bacterial , Fever , Haemophilus , Haemophilus influenzae , Haemophilus Infections/microbiology , Purpura , Animals, Newborn , Bacteremia , Disease Models, Animal , Haemophilus , Haemophilus influenzae , Rats, Sprague-Dawley , VirulenceABSTRACT
Os autores apresentam os aspectos clinicos e laboratoriais de 83 pacientes portadores de septicemia e atendidos nos anos de 1980 a 1982. Do ponto de vista etiologico, as bacterias gram-negativas prevaleceram sobre as gram-positivas.A S. typhimurium foi o agente mais isolado, seguindo-se o S.aureus. A mortalidade foi de 55% recaindo sobretudo em lactentes com menos de seis meses da idade, leucopenicos, hipoalbumicos e plaquetopenicos. Salienta-se o isolamento crescente de bacterias gram-negativas de origem hospitalar e a elevada resistencia aos antimicrobianos
Subject(s)
Infant , Child, Preschool , Child , Adolescent , Humans , Male , Female , Sepsis , MortalityABSTRACT
Estudio bacteriológico de 60 cepas pertenecientes a pacientes con enfermedad invasiva provenientes de hospitales de referencia nacional, realizados en el Laboratorio Central de Salud Pública