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Seroepidemiology

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https://www.readbyqxmd.com/read/28771136/assessing-evidence-for-avian-to-human-transmission-of-influenza-a-h9n2-virus-in-rural-farming-communities-in-northern-vietnam
#1
Le Nguyen Minh Hoa, Nguyen Anh Tuan, Pham Ha My, Tran Thi Kieu Huong, Nguyen Thi Yen Chi, Trang Thi Hau Thu, Juan Carrique-Mas, Mai Thuy Duong, Nguyen Dang Tho, Nguyen Dang Hoang, To Long Thanh, Nguyen Thi Diep, Nguyen van Duong, Tran Khanh Toan, Trinh Son Tung, Le Quynh Mai, Munir Iqbal, Heiman Wertheim, H Rogier van Doorn, Juliet E Bryant, The Vizions Consortium
Rural farming communities in northern Vietnam do not routinely practice vaccination for influenza A viruses (IAV) for either humans or poultry, which enables us to study transmission intensity via seroepidemiology. Using samples from a longitudinal cohort of farming households, we determined the number of symptomatic and asymptomatic human infections for seasonal IAV and avian A/H9 over 2 years. As expected, we detected virologically confirmed acute cases of seasonal IAV in humans, as well as large numbers of subclinical seroconversions to A/H1pdm [55/265 (21 %)], A/H3 [95/265 (36 %)] and A/H9 [24/265 (9 %)]...
August 4, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28766163/seroepidemiology-of-echovirus-30-in-korean-children
#2
Joo Young Lee, Yumi Seo, Ui Yoon Choi, Jong-Hyun Kim, Jin Han Kang
BACKGROUND: Although aseptic meningitis associated with echovirus type 30 has emerged as a global public health concern, no data have been reported on children's immune status against echovirus type 30. The current study aimed to investigate the seropositivity among Korean children for antibodies against echovirus 30. METHODS: Two hundred and fifty residual serum samples were collected at St. Paul's Hospital. Individuals were categorized by age into four groups: group 1 (3 months-2 years), group 2 (3-6 years), group 3 (7-10 years) and group 4 (11-15 years)...
August 2, 2017: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/28764157/seroepidemiology-of-spotted-fever-rickettsiosis-in-uttar-pradesh-a-prospective-study
#3
Chandra Dev Pati Tripathi, Mastan Singh, Jyotsna Agarwal, Chandra Kanta, Virendra Atam
INTRODUCTION: Spotted Fever Rickettsiosis (SFR), an acute febrile illness caused by Rickettsia rickettsii, R. conorii and R. akari which is associated with considerable morbidity and mortality. SFR is one of the most covert emerging infections of the present time which is prevalent in various parts of India as shown by the increase in the number of clinically diagnosed patients in various states except Uttar Pradesh. AIM: To diagnose SFR in clinically suspected patients using serological tests and recognition of common epidemiologic situations and clinical manifestations of SFR in the state of Uttar Pradesh...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28761468/seroepidemiological-study-of-toxoplasma-gondii-infection-among-psychiatric-patients-in-mashhad-northeast-of-iran
#4
Ebrahim Abdollahian, Reza Shafiei, Naghmeh Mokhber, Kurosh Kalantar, Abdolmajid Fata
BACKGROUND: Psychiatric patients have an increased risk of some infections like toxoplasmosis. Investigations on Toxoplasma gondii infection among psychiatric patients have been limited in Mashhad, Northeast of Iran. In this case-control study, prevalence of T. gondii was investigated by serological method. METHODS: This case-control study was performed among psychiatric patients admitted to Avicenna Hospital in Mashhad, Northeast of Iran. Three hundred and fifty inpatients and 350 controls were examined in 2012-2013 for detection of IgG and IgM antibodies against T...
January 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28761466/epidemiological-study-of-toxocar-canis-in-children-under-14-years-old-and-dogs-in-zabol-and-chabahar-districts-southeast-of-iran
#5
Mehdi Khoshsima Shahraki, Mansour Dabirzadeh, Mahdi Afshari, Yahya Maroufi
BACKGROUND: The purpose of this study was seroepidemiological and parasitological assessment of Toxocara canis infection in children and dogs in Zabol and Chabahar, Iran. METHODS: This study was a descriptive-analytic study with a simple random sampling of children under 14 yr old, referring to urban, rural, and tribal laboratories of Zabol and Chabahar, Sistan and Baluchestan Province, Iran in 2016. Demographic data, clinical, and laboratory conditions of patients were collected through interviews, questionnaires, and blood count measuring...
January 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28746985/west-nile-virus-lineage-2-in-culex-specimens-from-iran
#6
Nariman Shahhosseini, Sadegh Chinikar, Seyed Hassan Moosa-Kazemi, Mohammad Mehdi Sedaghat, Mohammad Hassan Kayedi, Renke Lühken, Jonas Schmidt-Chanasit
OBJECTIVE: Screening of mosquitoes for viruses is an important forecasting tool for emerging and reemerging arboviruses. Iran has been known to harbor medically important arboviruses such as West Nile virus (WNV) and dengue virus (DENV) based on seroepidemiological data. However, there are no data about the potential mosquito vectors for arboviruses in Iran. This study was performed to provide mosquito and arbovirus data from Iran. MATERIALS AND METHODS: 32,317 mosquitos were collected at 16 sites in 5 provinces of Iran in 2015 and 2016...
July 26, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28737625/a-national-seroepidemiologic-survey-of-pertussis-among-school-children-in-taiwan
#7
Chun-Yi Lu, Hsing-Chen Tsai, Yhu-Chering Huang, Daniel Tsung-Ning Huang, Ching-Chuan Liu, Li-Min Huang
BACKGROUND: In 2009, a booster dose of acellular pertussis vaccine for children at or before entry to elementary school was added to the national immunization program in Taiwan, which includes pertussis vaccination at 2, 4, 6, and 18 months of age. In 2013, a study to assess the level of humoral immunity against pertussis in elementary and junior high school children and adolescents was conducted. METHODS: A multistage stratified systematic sampling method was applied to randomly selected grade 1 to 9 school children for testing...
July 20, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28736196/serological-and-molecular-epidemiological-outcomes-after-two-decades-of-universal-infant-hepatitis-b-virus-hbv-vaccination-in-nunavut-canada
#8
Chris Huynh, Gerald Y Minuk, Julia Uhanova, Maureen Baikie, Thomas Wong, Carla Osiowy
Chronic hepatitis B virus (HBV) infection within the Canadian Arctic is considered endemic (>2% prevalence). Within the Arctic region of Nunavut, a vaccination program targeted at newborn infants was initiated approximately 20years ago, along with interim grade school catch-up programs, with the result that individuals born after 1980 are presumed vaccinated. This study investigates the effectiveness of these programs and is the first seroepidemiological survey to determine HBV prevalence in Nunavut in the post-vaccination era...
July 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28730993/seroepidemiology-of-sarcocystis-neurona-and-neospora-hughesi-infections-in-domestic-donkeys-equus-asinus-in-durango-mexico
#9
Cosme Alvarado-Esquivel, Daniel K Howe, Michelle R Yeargan, Domingo Alvarado-Esquivel, José Alfredo Zamarripa-Barboza, Jitender P Dubey
There is currently no information regarding Sarcocystis neurona and Neospora hughesi infections in donkeys in Mexico. Here, we determined the presence of antibodies against S. neurona and N. hughesi in donkeys in the northern Mexican state of Durango. Serum samples of 239 domestic donkeys (Equus asinus) were assayed for S. neurona and N. hughesi antibodies using home-made enzyme-linked immunoassays; six (2.5%) of the 239 donkeys tested seropositive for S. neurona. The seroprevalence of S. neurona infection was comparable among donkeys regardless of their origin, health status, or sex...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28729702/structure-of-general-population-antibody-titer-distributions-to-influenza-a-virus
#10
Nguyen Thi Duy Nhat, Stacy Todd, Erwin de Bruin, Tran Thi Nhu Thao, Nguyen Ha Thao Vy, Tran Minh Quan, Dao Nguyen Vinh, Janko van Beek, Pham Hong Anh, Ha Minh Lam, Nguyen Thanh Hung, Nguyen Thi Le Thanh, Huynh Le Anh Huy, Vo Thi Hong Ha, Stephen Baker, Guy E Thwaites, Nguyen Thi Nam Lien, Tran Thi Kim Hong, Jeremy Farrar, Cameron P Simmons, Nguyen Van Vinh Chau, Marion Koopmans, Maciej F Boni
Seroepidemiological studies aim to understand population-level exposure and immunity to infectious diseases. Their results are normally presented as binary outcomes describing the presence or absence of pathogen-specific antibody, despite the fact that many assays measure continuous quantities. A population's natural distribution of antibody titers to an endemic infectious disease may include information on multiple serological states - naiveté, recent infection, non-recent infection, childhood infection - depending on the disease in question and the acquisition and waning patterns of immunity...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28727726/a-cross-sectional-seroepidemiological-survey-of-typhoid-fever-in-fiji
#11
Conall H Watson, Stephen Baker, Colleen L Lau, Kitione Rawalai, Mere Taufa, Jerimaia Coriakula, Nga Tran Vu Thieu, Tan Trinh Van, Dung Tran Thi Ngoc, Niel Hens, John H Lowry, Ruklanthi de Alwis, Jorge Cano, Kylie Jenkins, E Kim Mulholland, Eric J Nilles, Mike Kama, W John Edmunds
Fiji, an upper-middle income state in the Pacific Ocean, has experienced an increase in confirmed case notifications of enteric fever caused by Salmonella enterica serovar Typhi (S. Typhi). To characterize the epidemiology of typhoid exposure, we conducted a cross-sectional sero-epidemiological survey measuring IgG against the Vi antigen of S. Typhi to estimate the effect of age, ethnicity, and other variables on seroprevalence. Epidemiologically relevant cut-off titres were established using a mixed model analysis of data from recovering culture-confirmed typhoid cases...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28719259/serosurvey-of-crimean-congo-hemorrhagic-fever-virus-in-cattle-mali-west-africa
#12
Ousmane Maiga, Miriam Andrada Sas, Kyle Rosenke, Badian Kamissoko, Marc Mertens, Nafomon Sogoba, Abdallah Traore, Modibo Sangare, Mamadou Niang, Tom G Schwan, Hamidou Moussa Maiga, Sekou F Traore, Heinz Feldmann, David Safronetz, Martin H Groschup
AbstractCrimean-Congo hemorrhagic fever is a tick-borne disease caused by the arbovirus Crimean-Congo hemorrhagic fever virus (CCHFV, family Bunyaviridae, genus Nairovirus). CCHFV can cause a severe hemorrhagic fever with high-case fatality rates in humans. CCHFV has a wide geographic range and has been described in around 30 countries in the Middle East, Asia, Europe, and Africa including Mali and neighboring countries. To date, little is known about the prevalence rates of CCHFV in Mali. Here, using banked bovine serum samples from across the country, we describe the results of a seroepidemiological study for CCHFV aimed at identifying regions of circulation in Mali...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28712556/serosurvey-for-crimean-congo-hemorrhagic-fever-virus-infections-in-ruminants-in-katanga-province-democratic-republic-of-the-congo
#13
Miriam A Sas, Marc Mertens, Jean G Kadiat, Isolde Schuster, Célestin P S Pongombo, Alois G K Maloba, Martin H Groschup
Crimean-Congo hemorrhagic fever virus (CCHFV) has been detected in many African countries. Unfortunately, little is known about the current CCHFV situation in most of those countries including the Democratic Republic of the Congo (DRC). In over 50 years, three human CCHF cases have been detected in DRC but no seroepidemiological investigation was performed so far. To determine the prevalence of CCHFV-specific antibodies we tested 838 serum samples of cattle, goat and sheep from the southern province Katanga, DRC...
July 3, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28688210/infection-with-influenza-a-h1n1-pdm09-during-the-first-wave-of-the-2009-pandemic-evidence-from-a-longitudinal-seroepidemiologic-study-in-dhaka-bangladesh
#14
Sharifa Nasreen, Mustafizur Rahman, Kathy Hancock, Jacqueline M Katz, Doli Goswami, Katharine Sturm-Ramirez, Crystal Holiday, Stacie Jefferson, Alicia Branch, David Wang, Vic Veguilla, Marc-Alain Widdowson, Alicia M Fry, W Abdullah Brooks
BACKGROUND: We determined influenza A(H1N1)pdm09 antibody levels before and after the first wave of the pandemic in an urban community in Dhaka, Bangladesh. METHODS: We identified a cohort of households by stratified random sampling. We collected baseline serum specimens during July-August 2009, just prior to the initial wave of the 2009 pandemic in this community and a second specimen during November 2009, after the pandemic peak. Paired sera was tested for antibodies against A(H1N1)pdm09 virus using microneutralization assay and hemagglutinin inhibition (HI) assay...
July 8, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28687404/significant-reduction-in-notification-and-seroprevalence-rates-of-hepatitis-b-virus-infection-among-the-population-of-zhejiang-province-china-aged-between-1-and-29years-from-2006-to-2014
#15
Yang Zhou, Hanqing He, Xuan Deng, Rui Yan, Xuewen Tang, Shuyun Xie, Jun Yao
BACKGROUND AND OBJECTIVE: The Chinese government integrated hepatitis B vaccination into the national immunization program in 1992, when the hepatitis B birth dose was introduced in China. Zhejiang province is a relatively developed area in eastern China and was an area with high endemicity for hepatitis B virus (HBV) infection via mother-to-child transmission. The hepatitis B vaccine vaccination rates for the birth dose and 3- dose schedule in Zhejiang Province since 1992 have both remained above 90% [1]...
July 4, 2017: Vaccine
https://www.readbyqxmd.com/read/28686621/risk-of-bias-and-confounding-of-observational-studies-of-zika-virus-infection-a-scoping-review-of-research-protocols
#16
Ludovic Reveiz, Michelle M Haby, Ruth Martínez-Vega, Carlos E Pinzón-Flores, Vanessa Elias, Emma Smith, Mariona Pinart, Nathalie Broutet, Francisco Becerra-Posada, Sylvain Aldighieri, Maria D Van Kerkhove
INTRODUCTION: Given the severity and impact of the current Zika virus (ZIKV) outbreak in the Americas, numerous countries have rushed to develop research studies to assess ZIKV and its potential health consequences. In an effort to ensure that studies are comprehensive, both internally and externally valid, and with reliable results, the World Health Organization, the Pan American Health Organization, Institut Pasteur, the networks of Fiocruz, the Consortia for the Standardization of Influenza Seroepidemiology (CONSISE) and the International Severe Acute Respiratory and Emerging Infection Consortium (ISARIC) have generated six standardized clinical and epidemiological research protocols and questionnaires to address key public health questions on ZIKV...
2017: PloS One
https://www.readbyqxmd.com/read/28677516/seroepidemiology-of-toxoplasma-gondii-infection-in-patients-with-liver-disease-in-eastern-china
#17
A L Tian, G X Li, H M Elsheikha, D S Gardner, X Y Zhang, W Dong, X P Yang, Y Y Luo, H L Li, W Cong, X Q Zhu
The role of the protozoan parasite Toxoplasma gondii in the pathogenesis of liver disease has recently gained much interest. The aim of this study was to determine the prevalence and risk factors associated with T. gondii infection in patients with liver disease from three cities in Shandong and Henan provinces, China. A case-control study was conducted from December 2014 to November 2015 and included 1142 patients with liver disease and 1142 healthy controls. Serum samples were collected from all individuals and were examined with enzyme-linked immunosorbent assay for the presence of anti-T...
July 5, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28658364/prevalence-and-factors-associated-with-human-brucellosis-in-livestock-professionals
#18
Franco Cazembe Mufinda, Fernando Boinas, Carla Nunes
OBJECTIVE: The objective of this study is to estimate the seroprevalence of human brucellosis in livestock professionals and analyze the factors associated with brucellosis focusing on sociodemographic variables and the variables of knowledge and practices related to the characteristics of the activities carried out in livestock. METHODS: This is a cross-sectional seroepidemiological study with a population of 131 workers of butchers, slaughter rooms, and slaughterhouse and 192 breeders sampled randomly in Namibe province, Angola...
June 22, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28646697/seroepidemiology-of-whooping-cough-in-the-czech-republic-estimates-of-incidence-of-infection-in-adults
#19
R Chlibek, J Smetana, R Sosovickova, K Fabianova, J Zavadilova, P Dite, P Gal, P Naplava, D Lzicarova
OBJECTIVES: Despite widespread vaccination programmes, pertussis remains a significant health burden in many countries. Low awareness of the disease, the high rate of asymptomatic cases in adults and difficulties with diagnosis could explain the under-reporting of pertussis. The lack of data on actual incidence constitutes an obstacle for public health authorities for the implementation of a vaccination strategy against pertussis in adults. The aim of this study was to evaluate the seroprevalence of antibodies against Bordetella pertussis infection in adults and to estimate the actual incidence of the disease compared with the reported incidence...
June 21, 2017: Public Health
https://www.readbyqxmd.com/read/28616474/serological-tools-for-detection-of-trichinella-infection-in-animals-and-humans
#20
REVIEW
Yong Yang, Ya Nan Cai, Ming Wei Tong, Na Sun, Yin Hua Xuan, Yan Jun Kang, Isabelle Vallée, Pascal Boireau, Shi Peng Cheng, Ming Yuan Liu
Trichinellosis is a serious foodborne zoonotic disease. It is an important threat to public health in both developing and developed countries. Human infections are strongly associated with consuming undercooked meat containing infective Trichinella larvae. The development of serological tools has enabled seroepidemiological studies and contributed to our knowledge on the importance of this parasite. Serological tests can also help the diagnosis of parasite infections in humans and the surveillance of animals...
December 2016: One Health
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