scholarly journals Preventive Efficacy of Pneumococcal Conjugated Vaccine (Population Aspects)

2022 ◽  
Vol 20 (6) ◽  
pp. 37-55
Author(s):  
I. N. Protasova ◽  
I. V. Feldblium ◽  
N. V. Bakhareva ◽  
O. P. Ovchinnikova ◽  
S. V. Domracheva
Keyword(s):  
Herd Immunity ◽  
Pneumococcal Infection ◽  
Public Health Problem ◽  
Incidence Rates ◽  
Community Acquired Pneumonia ◽  
Clinical Forms ◽  
Structure Changes ◽  
Mass Immunization ◽  
The Impact ◽  
Infants And Young Children

Relevance. Pneumococcal disease remains an urgent public health problem, despite mass immunization of infants and young children. The impact of children’s universal vaccination on the morbidity and etiological structure in various clinical forms of infection remains unclear in children and adults. Аim. Тo evaluate the herd effect of children’s mass immunization with a 13-valent conjugated pneumococcal vaccine. Materials and Methods. The prophylactic efficacy of mass vaccination is studied within comparative retrospective epidemiological analysis of incidence rates and etiological structure of bacterial meningitis, ear diseases and mastoiditis, and community-acquired pneumonia in children and adults of Krasnoyarsk region in the pre- and post-vaccination periods, according to the official statistics and microbiological monitoring. Results. The changes in decrease of incidence rates with all clinical forms of pneumococcal infection except community-acquired pneumonia are revealed both in children and adults during mass immunization. Etiological structure changes and also changes of S. pneumoniae serotype distribution are detected in major clinical forms of infection. Conclusion. Reducing the incidence rates in children is determined predominantly by vaccinal prevention. The observed decrease of incidence rates in adults is the result of reducing the number of pneumococcal infection sources among children (herd immunity).

scholarly journals Spatio-temporal dynamics of schistosomiasis in Rwanda between 2001 and 2012: impact of the national Neglected Tropical Disease control programme

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
Elias Nyandwi ◽  
Tom Veldkamp ◽  
Frank Badu Osei ◽  
Sherif Amer
Keyword(s):  
Temporal Dynamics ◽  
Public Health Problem ◽  
Incidence Rates ◽  
Control Programme ◽  
Scan Statistics ◽  
Major Public Health Problem ◽  
Implementation Phase ◽  
Incidence Data ◽  
Spatio Temporal ◽  
The Impact

Schistosomiasis is recognised as a major public health problem in Rwanda. We aimed to identify the spatio-temporal dynamics of its distribution at a fine-scale spatial resolution and to explore the impact of control programme interventions. Incidence data of Schistosoma mansoni infection at 367 health facilities were obtained for the period 2001-2012. Disease cluster analyses were conducted using spatial scan statistics and geographic information systems. The impact of control interventions was assessed for three distinct sub-periods. Findings demonstrated persisting, emerging and re-emerging clusters of schistosomiasis infection across space and time. The control programme initially caused an abrupt increase in incidence rates during its implementation phase. However, this was followed by declining and disappearing clusters when the programme was fully in place. The findings presented should contribute to a better understanding of the dynamics of schistosomiasis distribution to be used when implementing future control activities, including prevention and elimination efforts.

scholarly journals Insights Into the Effects of Mucosal Epithelial and Innate Immune Dysfunction in Older People on Host Interactions With Streptococcus pneumoniae

2021 ◽  
Vol 11 ◽  
Author(s):  
Caroline M. Weight ◽  
Simon P. Jochems ◽  
Hugh Adler ◽  
Daniela M. Ferreira ◽  
Jeremy S. Brown ◽  
...  
Keyword(s):  
Streptococcus Pneumoniae ◽  
Older People ◽  
Immune Cell ◽  
Herd Immunity ◽  
Pneumococcal Infection ◽  
Innate Immune ◽  
Older Individuals ◽  
Serotype Replacement ◽  
Pneumococcal Colonization ◽  
The Impact

In humans, nasopharyngeal carriage of Streptococcus pneumoniae is common and although primarily asymptomatic, is a pre-requisite for pneumonia and invasive pneumococcal disease (IPD). Together, these kill over 500,000 people over the age of 70 years worldwide every year. Pneumococcal conjugate vaccines have been largely successful in reducing IPD in young children and have had considerable indirect impact in protection of older people in industrialized country settings (herd immunity). However, serotype replacement continues to threaten vulnerable populations, particularly older people in whom direct vaccine efficacy is reduced. The early control of pneumococcal colonization at the mucosal surface is mediated through a complex array of epithelial and innate immune cell interactions. Older people often display a state of chronic inflammation, which is associated with an increased mortality risk and has been termed ‘Inflammageing’. In this review, we discuss the contribution of an altered microbiome, the impact of inflammageing on human epithelial and innate immunity to S. pneumoniae, and how the resulting dysregulation may affect the outcome of pneumococcal infection in older individuals. We describe the impact of the pneumococcal vaccine and highlight potential research approaches which may improve our understanding of respiratory mucosal immunity during pneumococcal colonization in older individuals.

Pneumococcal infection in Russia: state of the issue

2021 ◽  
Vol 76 (1) ◽  
pp. 28-42
Author(s):  
Nikolay I. Briko ◽  
Vladimir A. Korshunov ◽  
Kirill S. Lomonosov
Keyword(s):  
Adult Population ◽  
Herd Immunity ◽  
Pneumococcal Infection ◽  
Community Acquired Pneumonia ◽  
Morbidity And Mortality ◽  
School Age Children ◽  
Economic Significance ◽  
Chronic Lung Diseases ◽  
One Year ◽  
High Level

Background: Pneumococcal disease is common cause of morbidity and mortality in adults and children worldwide. The severity of pneumococcal diseases determines their high socio-economic significance. Aims: Estimate the burden of pneumococcal infection and vaccination coverage in Russia. Methods: The data was obtained from federal surveillance system. The information obtained was analyzed using descriptive statistics methods. Results: The annual incidence of community-acquired pneumonia in Russia was 491.7/100000 in 2011-2019. It ranges from 359.8/100000 among adults of working age to 1505.4/100000 among children 1-2 years old. The upward trend of incidence is observed throughout the period, most expressive among school-age children (7-17 years old). Total 29.2% of all pneumonia have an identified etiology. 94% of pneumonia with known etiology are bacterial, 8.4% among it are pneumococcal. Pneumonia accounts for 57% of all deaths from respiratory diseases among children under five (3.7/100000) and 34% among elderly. The death rate from pneumonia in 2009-2018 tends to decrease. In 2018, 25.5 thousand deaths from pneumonia were registered (17.5/100000). The highest rate is observed among children under one year (14.0 /100000) and elderly (41.2 /100000). There is a downward trend in incidence of otitis media. The incidence in children under 14 was 2612.6/100 000 in 2018. The incidence of bacterial meningitis is 1.4/100 000. Every year 2-3 thousand cases are registered, 43-52% of which are among children (3.04/100000., maximally in children under one year old, 13.2/100000). The level of vaccination against pneumococcal infection is increasing annually, but the proportion of children who have received a completed course of vaccination remains insufficient (64.6% in 2019). Coverage among the adult population was 2.3% (3.8% among those over 60). The main contingents of vaccinated adults are conscripts (coverage 67.4%) and people with chronic lung diseases (coverage 15.1%). Conclusions: The socio-economic and epidemiological burden of diseases associated with pneumococcal infection in Russia remains high. Accurate assessment of morbidity and mortality rates caused by St. pneumoniae diseases isnt possible due to the insufficient level of their ethological identification. Further efforts are required to achieve high level of herd immunity against pneumococcal infection through vaccine prevention during COVID-19 pandemic.

scholarly journals Impact of vaccination and birth rate on the epidemiology of pertussis: a comparative study in 64 countries

2010 ◽  
Vol 277 (1698) ◽  
pp. 3239-3245 ◽  
Author(s):  
H. Broutin ◽  
C. Viboud ◽  
B. T. Grenfell ◽  
M. A. Miller ◽  
P. Rohani
Keyword(s):  
Birth Rate ◽  
Vaccine Coverage ◽  
Strong Association ◽  
Herd Immunity ◽  
Public Health Problem ◽  
Recruitment Rate ◽  
Vaccine Uptake ◽  
Important Public Health Problem ◽  
Epidemic Period ◽  
The Impact

Bordetella pertussis infection remains an important public health problem worldwide despite decades of routine vaccination. A key indicator of the impact of vaccination programmes is the inter-epidemic period, which is expected to increase with vaccine uptake if there is significant herd immunity. Based on empirical data from 64 countries across the five continents over the past 30–70 years, we document the observed relationship between the average inter-epidemic period, birth rate and vaccine coverage. We then use a mathematical model to explore the range of scenarios for duration of immunity and transmission resulting from repeat infections that are consistent with empirical evidence. Estimates of pertussis periodicity ranged between 2 and 4.6 years, with a strong association with susceptible recruitment rate, defined as birth rate × (1 − vaccine coverage). Periodicity increased by 1.27 years on average after the introduction of national vaccination programmes (95% CI: 1.13, 1.41 years), indicative of increased herd immunity. Mathematical models suggest that the observed patterns of pertussis periodicity are equally consistent with loss of immunity that is not as rapid as currently thought, or with negligible transmission generated by repeat infections. We conclude that both vaccine coverage and birth rate drive pertussis periodicity globally and that vaccination induces strong herd immunity effects. A better understanding of the role of repeat infections in pertussis transmission is critical to refine existing control strategies.

scholarly journals A MURINE EXPERIMENTAL MODELS IN CARCINOGENESIS STUDIES ARE EFFICIENT?

2020 ◽  
Vol 8 (1) ◽  
pp. 213-219
Author(s):  
Rondon Ramalho ◽  
Antônio Carlos de Abreu ◽  
Evair Moisés De Lima Santiago ◽  
Gislaine Recaldes de Abreu ◽  
Marcelo Barbosa Neves ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Animal Models ◽  
Molecular Mechanisms ◽  
Complex Disease ◽  
Tumor Biology ◽  
Public Health Problem ◽  
Incidence Rates ◽  
Noncommunicable Diseases ◽  
Risk Of Cancer ◽  
The Impact

Economic and social development has essential repercussions on the health of populations, as it alters the morbidity and mortality profile and favors the increase in exposures and risks to human health, especially the risk of cancer. Cancer is considered a significant public health problem worldwide, and remains with high incidence rates, being considered a complex disease, with multifactorial causes. The permanent incidence rates of prostate cancer prove to be one of the most prevalent, considered the second most common cancer in men worldwide, and a leading cause of deaths from chronic noncommunicable diseases. Among the different types of cancer, prostate cancer has been the subject of great scientific interest. In this context, animal models are valuable for studying cancer-related aspects, the use of animal models has the potential to increase our understanding of carcinogenesis, tumor biology, and the impact of specific molecular events on tumor biology. Animal models with specific human cancer characteristics can be used to test cancer prevention and treatment strategies. In this review, we aim to show how the use of animal models as an essential tool in the study of the molecular mechanisms of carcinogenesis.

scholarly journals The Effect of Selective and Mass Immunization Against Pneumococcal Infection on the Morbidity and Mortality due to Community-Acquired Pneumonia in Children Under 5 Years of Age

2019 ◽  
Vol 16 (4) ◽  
pp. 216-228
Author(s):  
Vadislav V. Semerikov ◽  
Elena S. Zubova ◽  
Lyudmila V. Sofronova
Keyword(s):  
Pneumococcal Infection ◽  
Chronically Ill ◽  
Community Acquired Pneumonia ◽  
Mass Vaccination ◽  
Morbidity And Mortality ◽  
Morbidity Rate ◽  
Mass Immunization ◽  
Cost Efficacy ◽  
Selective Vaccination ◽  
Children Under 5

Background. It is required to perform estimation of epidemiological and cost efficacy (regarding morbidity rate) of mass routine vaccination against pneumococcal infection in Russian children and carried out earlier selective vaccination of children from high-risk groups on the basis of four-year experience. It is also important to estimate the rate of hospital admissions in this patient group, long-term and annual cycles, morbidity age and etiology structure, and mortality due to community-acquired pneumonia as one of the most common form of pneumococcal disease. The aim is to study the effect of selective and mass immunization against pneumococcal infection on the morbidity and mortality due to community-acquired pneumonia in children under 5 years of age. Methods. The analysis of communityacquired pneumonia morbidity (in 2003–2018) and mortality due to pneumonias (in 2003–2018) in children under the 14 years old in Perm was carried out. Serotypes of circulating pneumococcus, etiology of community-acquired pneumonias and immunization cost efficacy (direct expense on health care) were further studied. The analysis of study indexes was carried out following selective (vaccination of at-risk children in 2011–2014) and mass (vaccination of infants in 2015–2018) immunization strategies. Results. The morbidity rate of community-acquired pneumonias decreased by 4.0 times (from 267.0 to 66.7 for 1000) after performing selective vaccination (2011–2014) in at-risk children (frequently and chronically ill children). The morbidity rate of community-acquired pneumonias in non vaccinated children of the same group increased by 2.0 times (from 40.0 to 80.0 for 1000 non-vaccinated). The prophylactic efficacy index was 46.0. Whereby the antibacterial index among vaccinated frequently and chronically ill children was 0.11 on one child. This index has decreased by 2.6 times (from 0.11 to 0.04 on one child) in a year within the framework of prospective controlled randomized clinical study. The antibacterial index among non-vaccinated children of this group remained slightly the same: 0.09 and 0.12 respectively. During the selective vaccination the mortality rate among infants decreased by 2 times: long-term average index was 17.9 (2011–2014) against 35.2 (2003-2010) on 100 thousand children. Mass vaccination of infants against pneumococcal infection has reduced the incidence of community-acquired pneumonias among children under 2 years of age and has led to absence of multiple sites of pneumococcal infection in children’s organizations. It also has reduced the number of hospitalized children and achieved zero mortality due to pneumonias in infants by the third year of this immunization strategy implementation. The obtained results were achieved mainly due to circulation of 7 pneumococcal serotypes (6A, 6B, 9V, 14, 19A, 19F, 23F) in children under 5 years of age. The threshold level of vaccination against pneumococcal infection advancing morbidity and mortality due to pneumonias in children was specified. The strategy of mass vaccination of infants was cost-effective. Conclusion. The new data on epidemiological and cost efficacy of various immunization strategies against pneumococcal infection in children was obtained.

scholarly journals Epidemiology of S. Pneumoniae-associated Pneumonias and the Analysis of Effectiveness of Vaccination against Pneumococcal Infection in Children under the Age of Six

2018 ◽  
Vol 17 (1) ◽  
pp. 25-32 ◽  
Author(s):  
A. V. Somova ◽  
V. V. Romanenko ◽  
A. A. Golubkova
Keyword(s):  
Respiratory Diseases ◽  
Pneumococcal Infection ◽  
Epidemiologic Study ◽  
Early Period ◽  
Incidence Rates ◽  
Community Acquired Pneumonia ◽  
Etiologic Role ◽  
Acute Respiratory Diseases ◽  
The Town

Pneumococcal infection is one of the main causes of acute respiratory diseases and exacerbation of chronic ones. In order to study the prevalence of community-acquired pneumonia, the etiologic role of S. pneumoniaе and effectiveness of vaccination among children under the age of 6 in the town of industrial cities, we conducted a non-interventional epidemiologic study of serotypes of circulating pneumococci and their compliance with the declared composition of vaccines recommended for prevention of pneumococcal infection in children. We also studied incidence rates of community-acquired pneumonias among children under the age of five vaccinated against pneumococcal infection, depending on the schedule and beginning of immunization. Our findings indicate a significant role of pneumococcus in the etiology of community-acquired pneumonias among children under the age of 17 (24.14%).The established spectrum of serotypes of pneumococcus from nasopharyngial swabs in children under the age of 17 with community-acquired pneumonia in the town of this city showed that such serotypes as 19F, 14, 9V/A, 15A/F, 6A/B/C, 3, and 23F contributed the most to the development of pneumonia (79.97%). Pneumococcus serotypes found corresponded to the composition of PCV13 in 76.36% of cases and to that of PCV10 – in 67.27%. Proven the effectiveness of the vaccine, the rate of epidemiologic effectiveness was 48.7% in relation to pneumonia of any etiology. Shown the largest epidemiological effectiveness (54.8%) of vaccination in children vaccinated in an early period (under the age of 1). 

scholarly journals 2714. Streptococcus pneumoniae Nasopharyngeal Carriage in Canadian Adults Hospitalized with Community-Acquired Pneumonia from 2010 to 2017

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S954-S955
Author(s):  
Jason J LeBlanc ◽  
May ElSherif ◽  
Amanda L S Lang ◽  
Hayley D Gillis ◽  
Lingyun Ye ◽  
...  
Keyword(s):  
Streptococcus Pneumoniae ◽  
Real Time ◽  
Herd Immunity ◽  
Community Acquired Pneumonia ◽  
Serotype Distribution ◽  
Childhood Immunization ◽  
Vaccine Serotypes ◽  
Serotype Replacement ◽  
The Impact ◽  
Over Time

Abstract Background Streptococcus pneumoniae can colonizes the human nasopharynx, and can cause life-threatening infections like community-acquired pneumonia (CAP) and invasive pneumococcal diseases (IPD). In Canada, the 13-valent conjugate vaccine (PCV13) was introduced in childhood immunization since 2010, with hopes that it would not only protect the vaccinated, but also confer indirect protection to adults through herd immunity. Given data on S. pneumoniae nasopharyngeal (NP) carriage in adults is scarce, this study reports on S. pneumoniae-positivity and serotype distribution in adult carriage from years 2010 to 2017. Methods Active surveillance was performed in adults hospitalized with for CAP or IPD from December 2010 to 2017. For assessment of S. pneumoniae carriage, NP swabs were tested using lytA and cpsA real-time PCR. S. pneumoniae-positive NPs were subjected to serotyping using conventional and real-time multiplex PCRs. Results Overall, 6472 NP swabs were tested, and Spn was identified in 366 (5.7%). Of the 366 S. pneumoniae-positive NP swabs, a serotype was assigned in 355 (97.0%). From years 2010 to 2017, the proportion of S. pneumoniae-positive NP swabs declined from 8.9% to 4.3%. This was also reflected in the proportion of serotypeable results attributed to PCV13 serotypes, which also declined from 76.9% to 42.2%. The decline was primarily attributed to PCV13 serotypes 7F and 19A. PCV13 serotype 3 remained predominant throughout the study, as did non-PCV13 serotypes like 22F, 33F, and 11A. On the other hand, a proportional rise over time was noted for non-vaccine serotypes (from 15.4% to 31.1%). This was primarily attributed to serotypes 23A, 15A, and 35B. Conclusion Monitoring serotype trends is important to assess the impact of pneumococcal vaccines. While herd immunity from PCV13 childhood immunization was anticipated, few studies have assessed its impact on adult carriage. This study described Spn serotype distribution in adults over years 2010 to 2017, demonstrating not only a reduction of PCV13 serotypes over time, but a proportional rise in non-vaccine serotypes. These emerging serotypes may represent the emergence of serotype replacement. Ongoing serotype surveillance will be needed to compare S. pneumoniae carriage to serotypes associated with pneumococcal CAP and IPD. Disclosures All authors: No reported disclosures.

scholarly journals The impact of vaccination against influenza and pneumococcal infection on the incidence of acute respiratory viral infections and community-acquired pneumonia in the Central Administrative District of Moscow

2021 ◽  
Vol 20 (2) ◽  
pp. 28-41
Author(s):  
O. A. Gruzdeva ◽  
T. N. Bilichenko ◽  
M. A. Baryshev ◽  
A. V. Zhukova
Keyword(s):  
Viral Infections ◽  
Pneumococcal Infection ◽  
Community Acquired Pneumonia ◽  
Economic Losses ◽  
Pneumococcal Infections ◽  
Administrative District ◽  
Respiratory Viral Infections ◽  
The Impact ◽  
Official Data ◽  
Great Damage

Background. Acute respiratory viral infections (ARVI) and pneumococcal infections (PI) annually cause great damage to the health and working capacity of the population, and lead to economic losses for employers and the state. Aim. To study the impact of influenza and PI vaccination coverage on morbidity of ARVI and community-acquired pneumonia (CAP) of the morbidity of population in Central administrative district (CAD) of Moscow. Material and methods. The analysis of official data on monitoring of morbidity from ARVI and CAP was carried out, and information on vaccination of the population against influenza and PI for 2012–2018 was used. Results. In 2018 ARVI accounted for 95.2% of infectious morbidity and the incidence rate was 29853.5 per 100 ths population. Over the period from 2012–2018, the incidence of ARVI and influenza gradually decreased by 2016, but in 2017 the incidence of ARVI was increased to the level of 2012 (+25.3%) however influenza was decreased (-40.9%). In 2018, the incidence of ARVI in adults remained at the level of 2017, and in children there was a decrease (-16.9%). The incidence of influenza in 2018 decreased in both adults (-65.4%) and children (-63.9%). During 2012–2018 the incidence of CAP had a persistent tendency to increase. The coverage of influenza vaccination in CAD population of Moscow has increased annually since 2012 and in 2018 reached 85.5% of children 0–17 years old and 65.5% of adults 18 years and older, and against PI – 46.3% of children and 2.6% of adults. Conclusion. The epidemic circulation of ARVI and influenza had a significant impact on the morbidity of CAD population of Moscow in 2012–2018. Annual vaccination of the population lead to decreasing of influenza incidence but the incidence of pneumonia tended to increase and need to improve prevention.

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