scholarly journals The Incidence of Bordetella Pertussis Infections in Jahrom City, Southern Iran

2021 ◽  
Author(s):  
Rahim Raufi ◽  
Reza Shahriarirad ◽  
Nikta Taghipour
Keyword(s):  
Family Size ◽  
Bordetella Pertussis ◽  
Whooping Cough ◽  
Cross Sectional Study ◽  
Diagnostic Methods ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Cross Sectional ◽  
Persistent Cough ◽  
Two Stages

Abstract Background: Bordetella Pertussis, known as the causative agent of whooping cough, is one of the leading causes of recurrent persistent cough at all ages, even in vaccinated individuals. Methods: A total number of 110 patients coughing for at least two weeks who were admitted to clinical centers in Jahrom, Iran, were included in this cross-sectional study. For this purpose, blood samples were collected from these individuals at two stages, i.e., at the beginning of the study and on the 21st day. Afterward, anti-pertussis toxin (PT) immunoglobulin G (IgG) was measured in serum samples via the enzyme-linked immunosorbent assay (ELISA). The given cases were further evaluated in terms of age, gender, occupation, place of living, and family size.Results: Out of 110 patients recruited in this study, 77 cases were female (70%). Also, only seven patients were shown to be serologically positive (6.4%). Moreover, no significant association was observed between pertussis incidence rate and the study variables, namely, age, gender, occupation, residency area (urban or rural), and family size (p>0.05).Conclusions: This study aimed to emphasize pertussis occurrence in individuals who merely present persistent cough without typical symptoms. This requires the physicians to conduct more precise assessments along with more rapid diagnostic methods.

scholarly journals SARS-CoV-2 IgG Antibodies Seroprevalence and Sera Neutralizing Activity in MEXICO: A National Cross-Sectional Study during 2020

2021 ◽  
Vol 9 (4) ◽  
pp. 850
Author(s):  
José Esteban Muñoz-Medina ◽  
Concepción Grajales-Muñiz ◽  
Angel Gustavo Salas-Lais ◽  
Larissa Fernandes-Matano ◽  
Constantino López-Macías ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Neutralizing Antibodies ◽  
Herd Immunity ◽  
Cross Sectional Study ◽  
Molecular Techniques ◽  
Diagnostic Methods ◽  
Molecular Diagnostic ◽  
Enzyme Linked Immunosorbent Assay ◽  
Cross Sectional ◽  
Neutralizing Activity

Until recently, the incidence of COVID-19 was primarily estimated using molecular diagnostic methods. However, the number of cases is vastly underreported using these methods. Seroprevalence studies estimate cumulative infection incidences and allow monitoring of transmission dynamics, and the presence of neutralizing antibodies in the population. In February 2020, the Mexican Social Security Institute began conducting anonymous unrelated sampling of residual sera from specimens across the country, excluding patients with fever within the previous two weeks and/or patients with an acute respiratory infection. Sampling was carried out weekly and began 17 days before Mexico’s first officially confirmed case. The 24,273 sera obtained were analyzed by chemiluminescent-linked immunosorbent assay (CLIA) IgG S1/S2 and, later, positive cases using this technique were also analyzed to determine the rate of neutralization using the enzyme-linked immunosorbent assay (ELISA). We identified 40 CLIA IgG positive cases before the first official report of SARS-CoV-2 infection in Mexico. The national seroprevalence was 3.5% in February and 33.5% in December. Neutralizing activity among IgG positives patients during overall study period was 86.1%. The extent of the SARS-CoV-2 infection in Mexico is 21 times higher than that reported by molecular techniques. Although the general population is still far from achieving herd immunity, epidemiological indicators should be re-estimated based on serological studies of this type.

scholarly journals Dogs as Sentinels for Flavivirus Exposure in Urban, Peri-Urban and Rural Hanoi, Vietnam

Viruses ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 507
Author(s):  
Long Pham-Thanh ◽  
Thang Nguyen-Tien ◽  
Ulf Magnusson ◽  
Vuong Bui-Nghia ◽  
Anh Bui-Ngoc ◽  
...  
Keyword(s):  
Mosquito Control ◽  
Risk Mitigation ◽  
Significant Risk ◽  
Cross Sectional Study ◽  
Cross Reactivity ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Cross Sectional ◽  
Major Health ◽  
Household Level

Diseases caused by flaviviruses, including dengue fever and Japanese encephalitis, are major health problems in Vietnam. This cross-sectional study explored the feasibility of domestic dogs as sentinels to better understand risks of mosquito-borne diseases in Hanoi city. A total of 475 dogs serum samples from 221 households in six districts of Hanoi were analyzed by a competitive enzyme-linked immunosorbent assay (cELISA) for antibodies to the pr-E protein of West Nile virus and other flaviviruses due to cross-reactivity. The overall flavivirus seroprevalence in the dog population was 70.7% (95% CI = 66.4–74.8%). At the animal level, significant associations between seropositive dogs and district location, age, breed and keeping practice were determined. At the household level, the major risk factors were rural and peri-urban locations, presence of pigs, coil burning and households without mosquito-borne disease experience (p < 0.05). Mosquito control by using larvicides or electric traps could lower seropositivity, but other measures did not contribute to significant risk mitigation of flavivirus exposure in dogs. These results will support better control of mosquito-borne diseases in Hanoi, and they indicate that dogs can be used as sentinels for flavivirus exposure.

Seroprevalence of contagious bovine pleuropneumonia in cattle of Punjab, Pakistan and assessment of risk factors

2019 ◽  
Author(s):  
Ahsan Anjum ◽  
Asim Aslam ◽  
Raheela Akhtar ◽  
Tahir Yaqub ◽  
Junaid Naseer ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cross Sectional Study ◽  
Control Measures ◽  
Export Market ◽  
Economic Losses ◽  
Enzyme Linked Immunosorbent Assay ◽  
Contagious Bovine Pleuropneumonia ◽  
Serum Samples ◽  
Cross Sectional ◽  
Associated Risk Factors

Contagious bovine pleuropneumonia (CBPP) is an important infectious disease of respiratory system of cattle, caused by Mycoplasma mycoides subspecies mycoides. A cross sectional study was conducted in Lahore, Kasur and Jhang districts of Punjab to determine the prevalence of CBPP. A total of 560 serum samples were examined for the specific antibodies against M. mycoides subspecies mycoides, using a sandwich enzyme-linked immunosorbent assay. Associated risk factors that were evaluated include age, gender and breed. In this study, the overall seroprevalence was 8.75%. The seroprevalence of CBPP in Lahore, Kasur and Jhang were 8.26, 8.20 and 10.06%, respectively, but no significance difference (P less than 0.05) was observed. Among the assessed potential predisposing factors, gender and breed were not significantly associated with the serological status of the animal (P greater than 0.05), in which the age affected significantly the positivity to CBPP (P less than 0.05). The highest seropositivity was observed in animals of more than 7 years of age (32.08%) followed by in 4-7 years of age (8.16%) and lowest in animals of less than 4 years old (0.79%). This study confirms the presence of CBPP in the state which could be a threat to livestock export market and warrants the implementation of control measures to mitigate the economic losses associated with the disease. 

scholarly journals Seroprevalence of Antitransglutaminase and Antiendomysium Antibodies in Adult Colombian Blood Bank Donors

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Sara Paredes-Echeverri ◽  
Ayda N. Rodríguez ◽  
Wilmer A. Cárdenas ◽  
Belén Mendoza de Molano ◽  
John M. González
Keyword(s):  
Native American ◽  
Cross Sectional Study ◽  
Immunofluorescence Assay ◽  
High Reactivity ◽  
Blood Bank ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Cross Sectional ◽  
Prevalence Studies ◽  
Hla Dq2

Celiac disease (CD) is an autoimmune enteropathy induced by the ingestion of gluten from wheat, barley, and rye in genetically susceptible individuals. The global prevalence of CD is 1.4%. However, most of the prevalence studies have been conducted in Caucasian populations; few studies have been performed in Latin America. The aim of this study is to determine the seroprevalence of auto-antibodies used as markers for CD in a Colombian cohort. In this cross-sectional study, the serum samples from Colombian donors of the National Red Cross Blood Bank were collected between June and September 2017 in Bogotá, Colombia. All sera were tested for IgA antitissue transglutaminase (TTG) by enzyme-linked immunosorbent assay. Seropositive sera were tested for IgA antiendomysium (EMA) using indirect immunofluorescence assay. The ancestral genetic composition was determined in donor samples with antibody assay reactivity. Those with two seroreactive assays were typed for HLA class II DQ2 and DQ8. In total, 228 blood donors participated in the study. Among them, 113 were females (49.56%) with an average age of 31.63 years (SD ± 12.99); males had an average of 34.71 years (SD ± 13.01). Only 3 (1.31%) donors reported chronic diarrhea and nonintentional weight loss; 11 (4.82%) had a family history of CD. For the serological assays, 11 donors (4.82%) were seroreactive to IgA anti-TTG: 3 had high reactivity and 8 had low reactivity. Of those seroreactive to IgA anti-TTG, 3 (1.32%) were also seroreactive to anti-EMA, and they were typed as HLA-DQ8 or HLA-DQ2. The baseline ancestral percentage of the seroreactive donors was higher for European and Native American than for African genes. The seroprevalence for anti-TTG and anti-EMA with the presence of HLA-DQ8 and HLA-DQ2 was 1.32%. Additionally, 4.82% donor participants were reactive only for anti-TTG. Compared with other studies, our findings suggest that Colombia has a high prevalence of CD markers.

scholarly journals Immunization status of Iranian military recruits against Bordetella pertussis infection (whooping cough)

2011 ◽  
Vol 5 (03) ◽  
pp. 224-226 ◽  
Author(s):  
Morteza Izadi ◽  
Shahla Afsharpaiman ◽  
Nematollah Jonaidi Jafari ◽  
Reza Ranjbar ◽  
Mohammad Mahdi Gooya ◽  
...  
Keyword(s):  
Bordetella Pertussis ◽  
Military Service ◽  
Whooping Cough ◽  
Booster Vaccination ◽  
Effective Vaccine ◽  
Enzyme Linked Immunosorbent Assay ◽  
Respiratory Pathogens ◽  
Serum Samples ◽  
Pertussis Infection ◽  
Military Recruits

Introduction: Military recruits are susceptible to respiratory pathogens because of increased antibiotic resistance and the lack of an effective vaccine. The goal of the current study was to determine the immunological status of the Bordetella pertussis among conscripts in Iranian military garrisons. Methodology: The study population consisted of 424 conscripts aged 18 to 21 years who enrolled for military service. They were selected using cluster stratified sampling from all military garrisons in Tehra, Iran. To determine the seroprevalence of infection, blood specimens from all recruits were collected and stored at - 20°C until assayed. All serum samples were screened for immunoglobulin G (IgG) antibodies against Bordetella pertussis toxin (PT) and by using enzyme-linked immunosorbent assay (ELISA). Results: The overall prevalence of B. pertussis seropositivity in military recruits was 60.6. Only 55.0% of the recruits had low awareness about the record of vaccination against B. pertussis during childhood. Among 424 studied individuals, 48 recruits (11.3%) had a positive history of whooping cough; prevalence of seropositivity in these recruits was 70.0%. Among these subjects, 61.7% were referred to a physician for treatment and only 39.6% of them were administered anti-pertussis therapy. Conclusions: Our study showed that military conscripts in Tehran garrisons were not serologically immune to pertussis and also confirmed the low awareness about vaccination and medical history related to pertussis infection in this high-risk subgroup of the Iranian population. Routine acellular booster vaccination, particularly before 18 years of age, is recommended.

scholarly journals Seroprevalence and Associated Risk Factors of Brucellosis in Livestock and Residents of New Valley Governorate, Egypt

2020 ◽  
pp. 531-539
Author(s):  
Mohamed Said Diab ◽  
Sherif Abd Allah Zidan ◽  
Nermin Abdalla A. Hassan ◽  
Haitham Elaadli ◽  
Ahmed Mohamed Bayoumi
Keyword(s):  
Risk Factors ◽  
Raw Milk ◽  
Cross Sectional Study ◽  
Enzyme Linked Immunosorbent Assay ◽  
Human Brucellosis ◽  
Human Occupation ◽  
Serum Samples ◽  
Cross Sectional ◽  
Significant Difference ◽  
Associated Risk Factors

Brucellosis is a worldwide zoonotic disease which is now considered endemic in most parts of Egypt. A cross-sectional study was carried out from December 2018 to February 2020 to investigate the seroprevalence of brucellosis in humans and livestock residing in two regions located in New Valley Governorate, Egypt. A total of 1254 animals (673 cattle, 348 sheep, and 233 goats) and 523 human serum samples were examined for brucellosis using Rose Bengal test (RBT) and then randomly selected sera (15 from cattle, 7 from sheep, 3 from goats, and 45 from humans) were further analyzed by complement fixation test, enzyme-linked immunosorbent assay to compare and detect the sensitivity and specificity of RBT. The prevalence of brucellosis was 0% in cattle, sheep, and goats while it was 23.9% in humans using RBT. Concerning humans, there was a higher percentage of infection in EL Kharga (33.6%). The prevalence of this infection was also at a higher level among individuals aged above 40 years (28.57%). Furthermore, men (26.11%) were more inclined to be inflicted, compared to women (22.5%) with no significant difference. Considering the human occupation, abattoir workers were the most predominant group of people at risk (33.3%), followed by farmers (31.25%) and animal keepers (20.6%) while the lowest prevalence was demonstrated in the housewives where the prevalence was 18.8 %. As a result, risk factors of the age range, locality, time of infection, contact with animals, and occupational groups could significantly affect the prevalence of human brucellosis in the New Valley Governorate. In conclusion, brucellosis is an alarming problem among residents of the New Valley Governorate. Thus, reducing the prevalence in humans and animals in the region of study may include restriction of the marketing the raw milk and enhancing public health awareness.

Hepatitis A infection in patients with chronic viral liver disease: a cross-sectional study in Jahrom, Iran

2014 ◽  
Vol 143 (3) ◽  
pp. 534-539 ◽  
Author(s):  
A. AHMADI VASMEHJANI ◽  
D. JAVESHGHANI ◽  
R. BAHARLOU ◽  
M. SHAYESTEHPOUR ◽  
S. D. MOUSAVINASAB ◽  
...  
Keyword(s):  
Liver Disease ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Severe Disease ◽  
Cross Sectional Study ◽  
Enzyme Linked Immunosorbent Assay ◽  
Sectional Study ◽  
Serum Samples ◽  
Cross Sectional ◽  
Chronic Hcv

SUMMARYInfection with hepatitis A virus (HAV) in patient with chronic liver disease (CLD; due to hepatitis B or hepatitis C) may cause severe disease and fulminant liver failure. This study aimed to determine the seroprevalence of HAV antibodies in patients infected with HCV or HBV in Iran (Jahrom city). A total of 159 patients with underlying CLD were recruited between September 2012 and February 2013. Serum samples were collected from each patient and tested for anti-HAV using enzyme-linked immunosorbent assay (ELISA). The overall seroprevalence of total anti-HAV was 79·2%. Patients aged 20–30 years had the lowest (28·3%) anti-HAV seropositivity and those aged >50 years had the highest (95%) seropositivity. The overall prevalence of anti-HAV in patients with chronic HCV and HBV infection was 93·7% and 77·1%, respectively. The anti-HAV seropositivity in liver cirrhosis patients was 100% compared to CLD patients. Because of low HAV immunity in younger CLD patients, vaccination against HAV should be considered.

scholarly journals Bayesian Estimation of the True Prevalence and of the Diagnostic Test Sensitivity and Specificity of EnteropathogenicYersiniain Finnish Pig Serum Samples

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
M. J. Vilar ◽  
J. Ranta ◽  
S. Virtanen ◽  
H. Korkeala
Keyword(s):  
Bayesian Analysis ◽  
Diagnostic Test ◽  
Sensitivity And Specificity ◽  
Cross Sectional Study ◽  
Study Data ◽  
Diagnostic Methods ◽  
Antibody Detection ◽  
Serum Samples ◽  
Cross Sectional ◽  
True Prevalence

Bayesian analysis was used to estimate the pig’s and herd’s true prevalence of enteropathogenicYersiniain serum samples collected from Finnish pig farms. The sensitivity and specificity of the diagnostic test were also estimated for the commercially available ELISA which is used for antibody detection against enteropathogenicYersinia. The Bayesian analysis was performed in two steps; the first step estimated the prior true prevalence of enteropathogenicYersiniawith data obtained from a systematic review of the literature. In the second step, data of the apparent prevalence (cross-sectional study data), prior true prevalence (first step), and estimated sensitivity and specificity of the diagnostic methods were used for building the Bayesian model. The true prevalence ofYersiniain slaughter-age pigs was 67.5% (95% PI 63.2–70.9). The true prevalence ofYersiniain sows was 74.0% (95% PI 57.3–82.4). The estimates of sensitivity and specificity values of the ELISA were 79.5% and 96.9%.

scholarly journals Antibodies against citrullinated proteins in relation to periodontitis with or without rheumatoid arthritis: a cross-sectional study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Pit Hui Lew ◽  
Mohammad Tariqur Rahman ◽  
Syarida Hasnur Safii ◽  
Nor Adinar Baharuddin ◽  
Peter Mark Bartold ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Cross Sectional Study ◽  
Causal Link ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Pocket Depth ◽  
Cross Sectional ◽  
Individual Level ◽  
Probing Pocket Depth ◽  
Citrullinated Proteins

Abstract Background Previous studies have reported conflicting findings between serum anti-citrullinated protein antibodies (ACPA) levels in rheumatoid arthritis (RA) participants with and without periodontitis (Pd). This study aimed to analyse possible correlations between serum ACPA levels and clinical parameters in Pd and RA participants. Methods Full mouth periodontal examination (probing pocket depth, clinical attachment levels, gingival bleeding index, visual plaque index) was conducted and serum samples obtained from 80 participants comprising RA, Pd, both RA and Pd (RAPd) and healthy individuals (HC). Erythrocyte sedimentation rates (ESR) and periodontal inflamed surface area (PISA) were obtained. Serum samples were analysed for ACPA quantification using enzyme-linked immunosorbent assay (ELISA). Results Median levels (IU/mL) of ACPA (interquartile range, IQR) in RAPd, RA, Pd and HC groups were 118.58(274.51), 102.02(252.89), 78.48(132.6) and 51.67(91.31) respectively. ACPA levels were significantly higher in RAPd and RA as compared to HC group (p < 0.05). However, ACPA levels of any of the groups were not correlated with any clinical periodontal and RA parameters within the respective groups. Conclusions At individual level, the amount of serum ACPA seem to have an increasing trend with the diseased condition in the order of RAPd > RA > Pd > HC. However, lack of any significant correlation between the serum ACPA levels with the clinical Pd and RA parameters warrants further studies to investigate the causal link between RA and Pd for such a trend. Further studies involving more inflammatory biomarkers might be useful to establish the causal link between Pd in the development and progression of RA or vice versa.

scholarly journals Adenovirus Humano Tipo 36 (Ad36) se relaciona con un mejor perfil lipídico en niños Mexicanos pero no con obesidad

2021 ◽  
Vol 32 (1) ◽  
Author(s):  
Claudia Muñoz-Yañez ◽  
Ramón A González ◽  
Grisel Ballesteros ◽  
Janeth Guangorena-Gómez ◽  
Esperanza Calleros-Rincón ◽  
...  
Keyword(s):  
Infectious Agent ◽  
Cross Sectional Study ◽  
Serum Glucose ◽  
High Density Lipoproteins ◽  
Total Serum ◽  
Enzyme Linked Immunosorbent Assay ◽  
Total Serum Cholesterol ◽  
Serum Samples ◽  
Cross Sectional ◽  
Biochemical Variables

Introducción. La obesidad y su comorbilidad son de las principales causas de muerte en México, es una enfermedad multifactorial, en la que se ha visto además la participación de un agente infeccioso. Ad36 se ha asociado con obesidad, pero paradójicamente también con niveles más bajos de glucosa, colesterol y triglicéridos, sin embargo, existe controversia en diferentes poblaciones. Objetivo. Evaluar la asociación de anticuerpos antiAd36 con variables antropométricas y bioquímicas. Material y métodos. Estudio transversal en 299 niños mexicanos mestizos en edad escolar (6 a 12 años). Se obtuvieron mediciones antropométricas de altura, peso corporal, circunferencia de la cintura, grosor del pliegue cutáneo del tríceps, se calculó índice de masa corporal (IMC) y relación cintura/ altura. Las variables bioquímicas incluyeron niveles séricos de glucosa, triglicéridos, colesterol total, lipoproteínas de alta densidad y lipoproteínas de baja densidad. Se utilizó un ensayo inmunoabsorbente ligado a enzimas (ELISA) para determinar los anticuerpos contra Ad36 en las muestras de suero. Resultados. Los anticuerpos anti-Ad36 se asociaron con niveles más bajos de colesterol sérico total (β = -0.133, p = 0.021) y LDL (β = -0.166, p = 0.004), y con niveles más altos de HDL (β = 0.120, p = 0.037), pero no con obesidad. Conclusión. En resumen, la exposición previa a Ad36 se asoció con un mejor perfil lipídico en niños mexicanos, independientemente de la obesidadBackground. Obesity and its comorbidities are one of the main causes of death in Mexico; it is a multifactorial disease, in which the participation of an infectious agent has been evaluated. Ad36 is associated with obesity, but paradoxically also with lower levels of glucose, cholesterol and triglycerides; however, there is controversy in different populations. Objective. To evaluate the association of antibodies against Ad36 with anthropometric and biochemical variables. Material and Methods. Cross-sectional study in 299 Mexican-mestizo children of elementary schools (6-12 years old). Anthropometric measurements of height, body weight, waist circumference, thickness of the triceps skin fold were obtained; body mass index (BMI) and waist / height ratio were calculated. Biochemical variables included serum glucose, triglycerides, total cholesterol, high-density lipoproteins, and low-density lipoproteins. An enzyme-linked immunosorbent assay (ELISA) was used to determine antibodies against Ad36 in serum samples. Results. Anti-Ad36 antibodies were associated with lower levels of total serum cholesterol (β = -0.133, p = 0.021) and LDL (β = -0.166, p = 0.004), and with higher levels of HDL (β = 0.120, p = 0.037), but not with obesity. Conclusion. Previous exposure to Ad36 was associated with a better lipid profile in Mexican children, regardless of obesity

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