scholarly journals Detection of measles cases in the Republic of Guinea in 2017–2018

2020 ◽  
Vol 10 (3) ◽  
pp. 570-574
Author(s):  
I. N. Lavrentieva ◽  
M. A. Bichurina ◽  
A. Y. Antipova ◽  
J. Camara ◽  
N.F. Magassouba
Keyword(s):  
Antibody Level ◽  
Measles Virus ◽  
Age Groups ◽  
Cold Chain ◽  
Epidemiological Surveillance ◽  
Serum Samples ◽  
Igg Antibody ◽  
Republic Of Guinea ◽  
Measles Vaccination ◽  
The Republic

In 2017, WHO reported 596 confirmed measles cases in Guinea Republic connected to the 2016–2017 epidemic outbreak that was stopped after additional immunization (SIA) against measles in two provinces of the country. Improving the effectiveness of SIA is associated with the identification of epidemiologically significant groups of the population. The aim of the study was to analyze 2017–2018 measles cases and assess population immunity to measles virus in the Republic of Guinea. Materials and methods. A total of 810 blood serum samples collected from patients with maculo-papular rash and clinical diagnosis “measles?” were tested for measles virus-specific IgM-and IgG antibody level. 445 sera of conditionally healthy individuals aged 7 months to 67 years were examined for anti-measles virus IgG antibody level. Immunoglobulins of classes M and G were detected by ELISA with test systems «Anti-Measles Virus ELISA (IgM)» (Euro immun, Germany) and «Anti-Measles Virus ELISA (IgG)» (Euroimmun, Germany). Results and discussion.In 2017–2018, the epidemic process of the measles in the Republic of Guinea proceeded very intensively, being markedly prevalent in children among age groups. In 2018, more than half of the cases (61.6%) were identified in children aged 1 to 5 years old; the second most abundant age group was children under one year (18.6%), probably due to violated measles vaccination, which in GR are subject to children of nine months of age. It was found that 16.4% of patients (60 out of 366) had documented data on measles vaccination. Potentially, high proportion of measles cases among pre-vaccinated subjects was due to insufficient immune response to a single immunization in children of 9 months of age. Moreover, lowered vaccine-related properties might also be violated “cold chain” during vaccine transportation occurring in tropical climate. Analyzing 445 subjects revealed that total number of measles virus seronegative subjects was 8.3%. However, the vast majority of them were children and young adults aged 7 months to 22 years, where 52.4% of seronegative subjects were identified. Thus, the data obtained indicate that intensive measles virus circulation in human population was continued that necessitate interventions for improving epidemiological surveillance, extend routine measles vaccination coverage and conduct SIAs against measles in GR.

scholarly journals A herd immunity to measles and rubella viruses in the population of the Republic of Serbia

2021 ◽  
Vol 11 (1) ◽  
pp. 171-176
Author(s):  
M. A. Bichurina ◽  
S. Filipovic-Vignjevic ◽  
A. Yu. Antipova ◽  
M. Bancevic ◽  
I. N. Lavrentieva
Keyword(s):  
Measles Virus ◽  
Herd Immunity ◽  
Age Groups ◽  
Age Group ◽  
Igg Antibodies ◽  
Mmr Vaccine ◽  
Igg Antibody ◽  
Group I ◽  
Study Results ◽  
The Republic

According to the WHO Strategic Plan, measles should be eradicated in 2020 in the five WHO Regions including European Region. However, large measles outbreaks are being periodically registered in diverse European countries. In the Republic of Serbia (SRB), 5,076 measles cases were detected in 2018, among which 15 cases were fatal.Aim of the study was to examine herd immunity to measles and rubella viruses in the population of the Republic of Serbia.Materials and methods. Blood serum samples obtained in 2018 and 2019 from conditionally healthy residents of the Republic of Serbia were tested for the presence of IgG antibodies to measles and rubella viruses in five age groups: I — children from 2 to 6 years old, II — children from 8 to 14 years old, III — 15 to 24 years old, IV — 25 to 49 years old and V — over 50 years old. A total of 1000 samples were obtained, 200 sera in each group. Enzygnost® Anti-Measles virus/IgG and Enzygnost® Anti-Rubella virus/IgG ELISA test systems (Siemens Healthcare Diagnostics Products GmbH, Germany) were used according to the manufacturer's instructions.Results. Overall, around 23.0% and 33.7% of the surveyed persons had no or low level of anti-measles IgG antibody (≥ 275.0 — ≤ 1000.0 IU/1). In age group I, 60% children contained no or “low” anti-measles antibodies titer (29.5% and 30.5%, respectively). In addition, low antibody titer level was mainly detected in individuals from age group II and III (p < 0.05). A third of children under 8—14 contained high IgG-antibodies titer against measles (> 3000.0 IU/l) that might serve as an evidence that such subjects recently recovered after measles. Similar results were obtained for IgG antibodies to rubella in the same age groups.Discussion. The study results evidence about altered routine immunization against measles and rubella in children aged 12—15 months (first vaccination) and those at age of 6—7 years (revaccination) with MMR vaccine. The data obtained correlate with official data on coverage with measles and rubella vaccines in the Republic of Serbia.

scholarly journals 2019–2020 measles in the Republic of Guinea: epidemic features and herd immunity

2021 ◽  
Vol 11 (6) ◽  
pp. 1179-1184
Author(s):  
I. N. Lavrentieva ◽  
M. A. Bichurina ◽  
A. Yu. Antipova ◽  
J. Camara ◽  
N’F. Magassouba ◽  
...  
Keyword(s):  
Measles Virus ◽  
Herd Immunity ◽  
Global Scale ◽  
Elisa Test ◽  
Seroprevalence Rate ◽  
Serum Samples ◽  
African Countries ◽  
Republic Of Guinea ◽  
Number Of Patients ◽  
The Republic

 Introduction. In connection with the Ebola epidemic in the West African countries, including the Republic of Guinea, a failure in implementing measles immunization program was noted. A proportion of measles seronegative subjects in 2017 was 52.4% of total examined individuals. In 2018, a high proportion of measles cases among children aged 1–5 years (61.6%) was identified. In order to stop the 2018 outbreak, the Supplemental Immunization Campaign was conducted in the Konakri and Nzerekore prefectures in the Republic of Guinea. The aim of this study was to examine the 2019–2020 measles epidemic situation and assess the measles population immunity in the Republic of Guinea. Materials and methods. Measles-specific antibodies were examined in 1697 blood serum samples collected from residents of different regions of the Republic of Guinea, aged from 7 months to 76 years, obtained in 2019–2020, and tested retrospectively. The ELISA test systems Anti-Measles Virus ELISA (IgM) Euroimmun and Anti-Measles Virus ELISA (IgG) Euroimmun (Germany) were used. The presence of serum IgM measles antibodies was considered as acute measles infection. Statistical analysis was performed using the software package Statistica 6.0. Results. Blood sera (n = 638) were tested for IgM-measles, and in 46.6% of cases the diagnosis was confirmed by laboratory tests. The biggest proportion of the total cases (61.6%) was found in children aged 1–4 years. The second most important age group was 5–9 years of age, the third is children under 1 year: 18.5% and 11.8% of the total number of patients, respectively. Measles infection was registered in vaccinated patients in 7.4% of the total number of laboratory-confirmed cases. 1059 subjects were examined for IgG measles antibody. The lowest seroprevalence rate was found among children under 4 years of age (47.8%). The highest (85.5%) was found among subjects of 40 years old and older. Conclusion. Measles in GR remains a poorly controlled infection. As in the previous years of observation (2017–2018), children under 5 years of age are the most vulnerable cohort of the population, despite the 2018 DI campaign conducted in a number of GR territories. More problems with the measles control in the Republic of Guinea are expected in the period from 2021, as along with the COVID-19 epidemic, Ebola is repeatedly registered in the country. The Republic of Guinea particularly requires assistance from the international community to implement the WHO measles elimination program on a global scale.

scholarly journals A survey of vaccine-induced measles IgG antibody titer and the verification of changes in temporal differences of measles vaccination in young adults

2019 ◽  
Author(s):  
Hiraku Sasaki ◽  
Tomoko Fukunaga ◽  
Ai Asano ◽  
Yoshio Suzuki ◽  
Yuko Nakanishi ◽  
...  
Keyword(s):  
Young Adult ◽  
Antibody Titer ◽  
Measles Virus ◽  
Serum Samples ◽  
Igg Antibody ◽  
Adult Participants ◽  
Significant Difference ◽  
Antibody Titers ◽  
Measles Vaccination ◽  
Specific Igg

AbstractIn Japan, sporadic measles cases increased rapidly in 2019 compared to that in past 6 years. To clarify the persistence of immunity against measles in young adult, this study explored the prevalence of IgG antibody titer against measles virus in 18-to 24-year-old young adult participants. Measles-specific IgG antibody titers determined by enzyme immunoassay in serum samples collected from 506 participants between 18 to 24 years were assessed through statistical analyses. Multiple regression analysis revealed that the distribution of measles IgG antibody titers was significantly correlated with medical history (P < 0.05), while there was no significant difference among the number of vaccinations related to measles IgG titers. Further, measles IgG titers were significantly different, which was determined by the temporal change that elapsed period after last vaccination (P < 0.05). These results indicate that periodic vaccination against measles is required for young and older adults to prevent even sporadic measles infection.

scholarly journals Measles serodiagnosis: standardization and evaluation of a dot-ELISA

1994 ◽  
Vol 36 (2) ◽  
pp. 139-147 ◽  
Author(s):  
Lourdes R. A. Vaz de Lima ◽  
Sumie Hoshino-Shimizu ◽  
Vanda A. U. F. de Souza ◽  
Claudio S. Pannuti ◽  
Heitor F. Andrade Junior ◽  
...  
Keyword(s):  
Measles Virus ◽  
Sodium Deoxycholate ◽  
Antibody Detection ◽  
Serum Samples ◽  
Igg Antibody ◽  
Measles Vaccination ◽  
Fluorescence Test ◽  
The Stability ◽  
Dot Elisa

A Dot-ELISA using a measles virus (MV) antigen obtained by sodium deoxycholate treatment was standardized and evaluated for IgM and IgG antibody detection in measles patients and measles-vaccinated subjects. A total of 192 serum samples were studied, comprising 47 from patients with acute and convalescent measles, 55 from 9-month old children prior to measles vaccination and 41 from children of the same age after vaccination, and 49 from patients with unrelated diseases. The diagnostic performances of the IgG Dot-ELISA and IgG immuno fluorescence test (IFT) were found to be close, varying from 0.97 to 1.00 in sensitivity and the specificities were maximum (1.00). Nevertheless, the sensitivity of the IgM Dot-ELISA (0.85) was higher than that (0.63) of the IgM IFT, although both assays had comparably high (1.00) specificities. The IgM Dot-ELISA in particular proved to be more sensitive in relation to other assays studied by revealing antibodies in 80.0% (12/15) of vaccinated children on the 15th day after immunization. In contrast the IgM IFT, failed to detect antibodies in the same group of vaccinated children. The stability of the MV antigen was longer than that of the IFT antigen, and the reproducibility of the Dot-Elisa was satisfactory.

scholarly journals A Survey of Vaccine-Induced Measles IgG Antibody Titer to Verify Temporal Changes in Response to Measles Vaccination in Young Adults

Vaccines ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 118
Author(s):  
Hiraku Sasaki ◽  
Tomoko Fukunaga ◽  
Ai Asano ◽  
Yoshio Suzuki ◽  
Yuko Nakanishi ◽  
...  
Keyword(s):  
Young Adults ◽  
Measles Virus ◽  
Serum Samples ◽  
Igg Antibody ◽  
Chiba Prefecture ◽  
History Of ◽  
Antibody Titers ◽  
Multivariable Regression ◽  
Measles Vaccination ◽  
Specific Igg

In Japan, sporadic measles cases increased rapidly in 2019 compared to the past six years. To clarify the persistence of immunity against measles in young adults, this study explored the persistence of immunoglobulin G (IgG) antibody titers against the measles virus in 17- to 24-year-old young participants who reside in the Chiba prefecture of Japan. Measles-specific IgG antibody titers, determined by enzyme immunoassay in serum samples collected from 506 participants, were assessed through statistical analyses. Multivariable regression analysis revealed that the distribution of measles IgG antibody titers was significantly correlated with a medical history of measles (P < 0.05), while there was no significant correlation between the number of vaccinations related to measles IgG titers. Furthermore, measles IgG titers tended to decrease, as revealed by the temporal change in IgG titers, during the elapsed period after the last vaccination (P = 0.08). These results indicate that periodic vaccination against measles is required to prevent sporadic measles infection in young and older adults.

scholarly journals The Status of Humoral Immunity to Parvovirus B19 in Population of Certain Geographical Regions

2020 ◽  
Vol 97 (3) ◽  
pp. 233-241
Author(s):  
Irina N. Lavrentieva ◽  
Irina V. Khamitova ◽  
Jacob Camara ◽  
Anastasia Yu. Antipova ◽  
Maina A. Bichurina ◽  
...  
Keyword(s):  
Central Asia ◽  
Humoral Immunity ◽  
Migrant Workers ◽  
Parvovirus B19 ◽  
Age Groups ◽  
Seroprevalence Rate ◽  
Serum Samples ◽  
Republic Of Guinea ◽  
Geographical Regions ◽  
The Republic

Introduction. In a number of countries, including Russia, there is no systematic registration and reporting of parvovirus infection cases; the extent of its spread can be estimated by using humoral immunity rates.Purpose of the study: Assessment of seroprevalence of parvovirus B19 (B19V) in different age groups of population of Russia, Central Asia, and West Africa.Materials and methods. A total of 1,732 blood serum samples from residents of St. Petersburg and Nur-Sultan, migrant workers from Uzbekistan and Tajikistan, residents of the Republic of Guinea were studied for IgG antibodies to B19V.Results. The highest seroprevalence rates were identified in St. Petersburg and Nur-Sultan (62–65%); the lowest rates were registered among migrant workers from Uzbekistan and Tajikistan (47%). The results for the Republic of Guinea showed a B19V seroprevalence rate of 53%. It was found that there is an increasing trend of seropositivity with age; the percentage of seropositive individuals clearly increases in older age groups: up to 55% — among migrant workers from Central Asia and residents of the Republic of Guinea; up to 80–85% — among residents of St. Petersburg and Nur-Sultan.Discussion. The obtained results confirm the worldwide occurrence of parvovirus infection. People susceptible to infection can cause infection spreading in high-risk groups — among pregnant women, immunodeficient patients, blood product recipients, and cancer patients.

scholarly journals Pattern of resilient age-related measles immunity

2020 ◽  
Vol 10 (2) ◽  
pp. 375-380
Author(s):  
A. G. Sonis ◽  
O. A. Gusyakova ◽  
F. N. Gilmiyarova ◽  
A. A. Ereshchenko ◽  
N. K. Ignatova ◽  
...  
Keyword(s):  
Measles Virus ◽  
Age Groups ◽  
Igg Antibody ◽  
Infection Level ◽  
Age Related ◽  
Specific Igg ◽  
Young Subjects ◽  
High Level ◽  
Medical University ◽  
Igg Level

Epidemiological situation describing global measles spread is ambiguous. Along with countries succeeded in measles eradication, there are those wherein measles rate remains at quite high level. Because measles is a vaccine-preventable infection, it may then be eradicated solely by ensuring sufficient population coverage with preventive vaccination. The aim of our study was to assess level of measles immunity in medical workers at the Clinics of Samara State Medical University as well as the Samara State Medical University. There were enrolled 1503 subjects (aged 18–79 years), among which all individuals under 55 (77.58%) but not older counterparts provided with medical record on previous measles vaccination or measles infection. Level of serum measles virus-specific IgG antibodies was measured by using ELISA (VektoKor-IgG, JSC Vector-Best, Novosibirsk), with mean concentration ranging in general population within 1.02±0.02 IU/ ml. Positive results were observed in 72.52% of the examined individuals. Average vs. high measles virus-specific IgG level was detected in 52.90% (mean age — 41.4±0.5 years) and 19.62% (mean age — 54.2±0.72 years) of individuals, whereas at level below threshold — in 27.48% of subjects (mean age — 33.25±0.53 years). Thus, in 34.16% of the surveyed vaccinated individuals mostly presented by young subjects contained anti-measles virus-specific antibodies below protective level. Older age groups were shown to increase in average IgG amount with age. Interestingly, age-related measles immunity pattern was observed: percentage of subjects with high vs. low measles virus-specific IgG level increases and decreases, respectively. Taking into consideration a large percentage of subjects previously vaccinated against measles among carriers of low measles immunity, it may be concluded that measles virus-specific IgG antibody level must be monitored in young adulthood to decide of whether subsequent revaccination is necessary.

scholarly journals Rise in 2017-2018 measles morbidity in Serbia and Northwest Russia

2020 ◽  
Vol 10 (4) ◽  
pp. 729-734
Author(s):  
V. D. Stoiljkovic ◽  
M. A. Bichurina ◽  
I. N. Lavrentieva ◽  
S. B. Filipovic-Vignjevic ◽  
M. D. Bancevic ◽  
...  
Keyword(s):  
Incidence Rate ◽  
Measles Virus ◽  
Federal District ◽  
Test System ◽  
Vaccination Status ◽  
Serum Samples ◽  
Virus Genotypes ◽  
The Russian Federation ◽  
The Republic ◽  
Measles Incidence

In 2017, the WHO registered 23,927 measles cases in 44 out of 53 countries in the European region. In 2018, measles incidence rate increased up to 82,599 cases registered in 48 countries of the region, with a large number of measles-associated deaths. Overall, 72 measles fatalities were registered in 10 European countries, including Serbia (15 cases).Aim of the study: to characterize 2017—2018 epidemiological upsurge of measles incidence rate observed in the Republic of Serbia (RS) and the Northwestern Federal District (NWFD) of the Russian Federation.Materials and methods. During the 2017—2018 season, 944 serum samples were collected from patients with measles, rubella, or exanthematous diseases in the NWFD and tested in the Laboratory of Virology at the St. Petersburg Regional Centre for Measles Surveillance (SPbRC). In 2017—2018, 2,946 serum samples from the Republic of Serbia were analyzed in the SPbRC by using ELISA with IgM measles test system (Vector-Best, Russia; or Siemens, Germany). Urine and swab samples were examined by RT-PCR and used for isolation and genotyping of measles viruses.Results. From 2017 to 2018, 5,798 measles cases were registered in the RS, among which 2,946 were laboratory-confirmed (serological testing and/or PCR). Unvaccinated subjects or those with unknown vaccination status accounted for majority of the cases. Children under 5 years of age and adults aged 30 years and over dominated among measles patients. During this season, 15 deaths were reported. Several genotypes of measles virus circulated in the RS, e.g. В3 Dublin, D8 Gir Somnath, and D8 Herborn. In 2018, 109 measles cases were recorded in the NWFD, 5 of which were imported from abroad. Among patients, adults comprised 64.2%, wherein 74.3% were covered by unvaccinated subjects or those with unknown vaccination status. Rise in measles incidence rate linked to multiple importations of various measles virus genotypes: В3 Kabul; B3 Dublin; D8 Frankfurt; D8 Cambridge; and D8 Gir Somnath.

scholarly journals Measles Virus Infection and Immunity in a Suboptimal Vaccination Coverage Setting

Vaccines ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 199 ◽  
Author(s):  
Monia Pacenti ◽  
Nataskya Maione ◽  
Enrico Lavezzo ◽  
Elisa Franchin ◽  
Federico Dal Bello ◽  
...  
Keyword(s):  
Vaccination Coverage ◽  
Neutralizing Antibodies ◽  
Measles Virus ◽  
High Efficiency ◽  
Vaccine Uptake ◽  
Reference Laboratory ◽  
Veneto Region ◽  
Igg Antibody ◽  
Measles Vaccination ◽  
Measles Outbreaks

Despite efforts to improve surveillance and vaccination coverage, measles virus (MeV) continues to cause outbreaks also in high-income countries. As the reference laboratory of the Veneto Region, Italy, we analyzed changes in population immunity, described measles outbreaks, investigated MeV genetic diversity, and evaluated cross-protection of measles vaccination against MeV epidemic strains. Like most European areas, the Veneto Region has suboptimal measles vaccination coverage and is facing a growing public mistrust of vaccination. A progressive decline of measles vaccine uptake was observed during the last decade in the Veneto Region, leading to immunity gaps in children and young adults. Measles outbreaks were caused by the same MeV genotype B3, D4, and D8 strains that were circulating in other European countries. Eleven cases of measles were observed in immunized subjects. These cases were not associated with particular MeV genotypes nor with mutations in epitopes recognized by neutralizing antibodies. Accordingly, sera from fully vaccinated subjects cross-neutralized epidemic MeV strains, including the genotypes B3, D4, and D8, with the same high efficiency demonstrated against the vaccine strain. In fully vaccinated subjects, high MeV IgG antibody titers persisted up to 30 years following vaccination. These results support the use of the current measles-containing vaccines and strategies to strengthen vaccination.

scholarly journals Chikungunya infection in Holy Family Red Crescent Medical College and Hospital during Rainy season

2016 ◽  
Vol 10 (2) ◽  
pp. 14-17
Author(s):  
Taslima Akter ◽  
Taslima Begum ◽  
Jannatul Ferdous ◽  
Sarmin Sultana ◽  
Sharmeen Rashid ◽  
...  
Keyword(s):  
Public Health ◽  
Rainy Season ◽  
Chikungunya Virus ◽  
Age Groups ◽  
Health Issue ◽  
Public Health Issue ◽  
Serum Samples ◽  
Igg Antibody ◽  
Important Public Health ◽  
Medical College

Recently, in Bangladesh, Chikungunya (CHIK) infection emerged as an important public health issue. Previously, it was not routinely tested by the physician, thus it might remain undiagnosed. Therefore, the present study was undertaken to find out Chikungunya infection in Holy Family Hospital, Dhaka among clinically suspected cases who were sent by the clinicians during rainy season. For detection of Chikungunya infection, a total of 147 serum samples were tested for IgM and IgG of Chikungunya virus (CHIKV) by Immuno chromatographic test (ICT). Out of which 64 (43.5%) samples were positive for Chikungunya infection (positive defined as a person with IgM and or IgG antibody). Of the 64 sero-positive cases, 34 (53.1%), 6 (9.4%) and 24 (37.5%) were positive for only IgM, only IgG and both IgM & IgG antibody respectively. Male were affected higher (51.56%) than female (48.44%). The infection was more common in 31-45 years, 46-60 years and more than 60 years of age groups which was 26.6%, 25% and 26.6% respectively In this study, it was found that among suspected cases of Chikungunya, sero positive cases were 43.5% which was about half of the suspected cases. This finding suggests that, there is need of screening of chikungunya virus and also need of appropriate strategies to control the disease as early as possible. Bangladesh J Med Microbiol 2016; 10 (2): 14-17

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