Humans ; Whooping Cough/prevention & control* ; Vaccines, Acellular ; China

BACKGROUND: Limited data on the incidence and clinical characteristics of adult pertussis infections are available in Korea. METHODS: Thirty-one hospitals and the Korean Centers for Disease Control and Prevention collaborated to investigate the incidence and clinical characteristics of pertussis infections among adults with a bothersome cough in non-outbreak, ordinary outpatient settings. Nasopharyngeal aspirates or nasopharyngeal swabs were collected for polymerase chain reaction (PCR) and culture tests. RESULTS: The study enrolled 934 patients between September 2009 and April 2011. Five patients were diagnosed as confirmed cases, satisfying both clinical and laboratory criteria (five positive PCR and one concurrent positive culture). Among 607 patients with cough duration of at least 2 weeks, 504 satisfied the clinical criteria of the US Centers for Disease Control and Prevention (i.e., probable case). The clinical pertussis cases (i.e., both probable and confirmed cases) had a wide age distribution (45.7+/-15.5 years) and cough duration (median, 30 days; interquartile range, 18.0~50.0 days). In addition, sputum, rhinorrhea, and myalgia were less common and dyspnea was more common in the clinical cases, compared to the others (p=0.037, p=0.006, p=0.005, and p=0.030, respectively). CONCLUSION: The positive rate of pertussis infection may be low in non-outbreak, ordinary clinical settings if a PCR-based method is used. However, further prospective, well-designed, multicenter studies are needed.
Adult ; Age Distribution ; Centers for Disease Control and Prevention (U.S.) ; Cough ; Dyspnea ; Humans ; Incidence ; Outpatients ; Polymerase Chain Reaction ; Sputum ; Whooping Cough

Pertussis is a highly contagious respiratory disease. Despite the high vaccination coverage, re-emergence of pertussis has been reported in many countries over the past two decades. With the increase in the incidence of pertussis, there has been a shift in the epidemiological features: an increased incidence of pertussis has been noted in older children and adults, who normally lack typical clinical manifestations, and who may be easily missed according to current diagnostic references for pertussis. In order to achieve better prevention and treatment of pertussis, this review article summarized the recent research progress in the epidemiology, clinical features, etiology, diagnosis, treatment, and prevention of pertussis, particularly focusing on the diagnosis of pertussis in older children and adults.
Anti-Bacterial Agents ; therapeutic use ; Humans ; Pertussis Vaccine ; immunology ; Whooping Cough ; diagnosis ; drug therapy ; prevention & control

Bordetella pertussis ; immunology ; Consensus ; Humans ; Pertussis Vaccine ; therapeutic use ; Whooping Cough ; immunology ; prevention & control

Some countries with high coverage of diphtheria, tetanus and pertussis combined vaccines have experienced pertussis epidemics and/or local outbreaks since 1980s. This phenomenon is called "pertussis resurgence". In recent years, pertussis epidemics in several provinces of China have resurged dramatically, arousing great concern from all parties. By referring the working model of the Global Pertussis Initiative, the Chinese Preventive Medicine Association has organized and launched the China Pertussis Initiative. A group of experts in this field has analyzed data of current pertussis in China and identified problems posed by the disease. This expert consensus was completed based on the discussions of the latest national and international research progeress, epidemiological trends and immunization strategies of pertussis, with special aims to provide guidance for the surveillance, prevention and control of pertussis in China.
China/epidemiology* ; Consensus ; Humans ; Immunization, Secondary ; Tetanus ; Vaccination ; Whooping Cough/prevention & control*

OBJECTIVE: To study the effect of pertussis vaccination on the clinical manifestations of infants and young children with pertussis. METHODS: A retrospective analysis was performed to investigate the differences in clinical manifestations and peripheral blood cell levels between pertussis children with different pertussis vaccination status. RESULTS: A total of 1 083 children with pertussisat at age of < 3 years were enrolled, with 551 children in the unvaccinated group and 532 in the vaccinated group. Of all the children, 392 had an age of onset of < 3 months (372 were unvaccinated and 20 were vaccinated) and 691 children had an age of onset of ≥ 3 months (179 were unvaccinated and 512 were vaccinated). Compared with the vaccinated group, the unvaccinated group had a longer length of hospital stay and a higher incidence rate of respiratory failure ( CONCLUSIONS Pertussis vaccination can reduce the incidence of severe pneumonia and respiratory failure and alleviate the severity of respiratory complications in infants and young children with pertussis.
Child ; Child, Preschool ; Humans ; Incidence ; Infant ; Pneumonia ; Retrospective Studies ; Vaccination ; Whooping Cough/prevention & control*

Pertussis is an acute, highly infectious respiratory disease caused by Bordetella pertussis, and is one of the leading causes of infant disease and death worldwide. The pertussis vaccine has been used in the expanded program on immunization globally since 1974 and the vaccination coverage remains high. In recent years, the pertussis incidence rate increased, even pertussis outbreaks occurred, in more and more countries or areas after years with low incidence level. The disease burden of pertussis has been seriously underestimated, and the prevention and control of pertussis is facing many challenges. This article reviews the epidemic status of pertussis worldwide, the factors affecting the reemergence of pertussis, and the challenges in the prevention and control to provide a reference for prevention and control of pertussis.
Infant ; Humans ; Whooping Cough/prevention & control* ; Vaccination ; Pertussis Vaccine/therapeutic use* ; Bordetella pertussis ; Disease Outbreaks

INTRODUCTION: Oropharyngeal swabs for diagnosis of COVID-19 often induce violent coughing, which can disperse infectious droplets onto providers. Incorrectly doffing personal protective equipment (PPE) increases the risk of transmission. A cheap, single-use variation of the face shield invented by a Singaporean team, SG Shield, aims to reduce this risk. This manikin study aimed to study the efficacy of the SG Shield in combination with standard PPE. METHODS: A person attired in full PPE whose face and chest was lined with grid paper stood in front of an airway manikin in an enclosed room. A small latex balloon containing ultraviolet fluorescent dye was placed in the oral cavity of the manikin and inflated until explosion to simulate a cough. Three study groups were tested: (a) control (no shield), (b) face shield and (c) SG Shield. The primary outcome was droplet dispersion, determined quantitatively by calculating the proportion of grid paper wall squares stained with fluorescent dye. The secondary outcome was the severity of provider contamination. RESULTS: The SG Shield significantly reduced droplet dispersion to 0% compared to the controls (99.0%, P = 0.001). The face shield also significantly reduced droplet contamination but to a lesser extent (80.0%) compared to the control group (P = 0.001). Although the qualitative severity of droplet contamination was significantly lower in both groups compared to the controls, the face shield group had more contamination of the provider's head and neck. CONCLUSION The manikin study showed that the SG Shield significantly reduces droplet dispersion to the swab provider's face and chest.
Humans ; Infectious Disease Transmission, Patient-to-Professional/prevention & control* ; COVID-19 ; Fluorescent Dyes ; Personal Protective Equipment ; Cough

Objective: To establish a sustainable updated literature data warehouse for global vaccine safety assessment, and provide data support for evidence-based vaccine safety assessment. Methods: Semi-automated construction and updating of a literature data warehouse were achieved through the continuous integration of standard operating steps of evidence-based reviews with artificial intelligence technologies. Following the standard procedure of a systematic literature review, the literatures about vaccine safety assessment published before November 29, 2020 were retrieved from 9 databases including OVID, Scopus, Web of Science, Cochrane Library, and ClinicalTrails.org in English and Wanfang, CNKI, VIP, and SinoMed in Chinese. Literatures were screened for two rounds in a semi-automatic manner (by artificial intelligence literature processing system and manual work) according to the inclusion/exclusion criteria. Furthermore, the literatures were classified according to the types of vaccines and adverse events. The updating strategy was established, and the literature data warehouse was updated regularly. Experts were organized to select specific vaccine safety topics and carry out special demonstration studies. Results: More than 0.41 million articles were retrieved. According to the inclusion/exclusion criteria, 23 304 articles were included after two rounds of screening. At present, we have selected and completed three prior topics as demonstration studies, including the systematic review of "DPT (diphtheria, pertussis and tetanus) vaccine and encephalopathy/encephalitis", and the classified management of literatures about allergic purpura and brachial plexus neuritis. Conclusions: The sustainable updated literature data warehouse of vaccine safety can provide high-quality research data for vaccine safety research, including evidence support for immunization related policy-making and adjustment and vaccine safety-related methodological research or clinical tool development; and further demonstration studies can provide references for building a new methodological framework system for timely and efficient completion of the evidence-based assessment of vaccine safety.
Artificial Intelligence ; Data Warehousing ; Humans ; Tetanus ; Tetanus Toxoid ; Whooping Cough/prevention & control*

Pertussis is a highly contagious respiratory tract disease caused by Bordetella pertussis infection. The clinical manifestation of this infection can be severe enough to cause death. Although pertussis has been supposed to be a vaccine-preventable disease ever since the widespread vaccination of children against pertussis was started, since the 1990s, cases of pertussis and related fatalities are on the rise, especially in countries with high vaccination coverage. In Korea, there have been no deaths due to pertussis since 1990, and the vaccination rate continues to be approximately 94%. However, the number of pertussis cases reported to the Korea Center for Disease Control and Prevention has tended to increase in the 2000s, and in 2009, there was an obvious increase in the number of pertussis cases reported. This review aims to present the latest information about the pathogenesis, diagnosis, treatment, and prevention of pertussis.
Bordetella pertussis ; Centers for Disease Control and Prevention (U.S.) ; Child ; Humans ; Immunization ; Korea ; Respiratory Tract Diseases ; Vaccination ; Whooping Cough