Seroprevalence and social determinants of varicella in Turkey.

BACKGROUND: In Turkey, varicella vaccine was introduced into routine childhood immunization in 2013, with a single dose administered to children aged 12 months. However, there is limited information on the morbidity (incidence and seroprevalence), mortality and burden of disease of varicella in the overall Turkish population. AIM: To determine varicella seroprevalence and its social determinants in Manisa Province, Turkey in children aged > 2 years before single-dose varicella vaccination was introduced in 2013. METHODS: The presence of anti varicella-zoster virus IgG antibodies was determined using enzyme-linked immunosorbent assay in serum samples collected from 1250 participants. RESULTS: The overall seroprevalence was 92.8% and the seroprevalence was > 90% among all age groups except 2-9 years (55.7%). Seroprevalence was significantly associated with family size, annual per capita equivalent income, number of people per room and education level. After adjusting by age, only education level remained significantly associated with seroprevalence, reflecting the early age effect. CONCLUSION: High seroprevalance depends on natural exposure to the infectious agent itself and is not associated with social determinants. High vaccine coverage should be maintained for effective varicella control and switching to a 2-dose schedule may also be considered to reduce the number and size of outbreaks in the Turkish population.

Seroprevalence of West Nile virus, Crimean-Congo hemorrhagic fever virus, Francisella tularensis and Borrelia burgdorferi in rural population of Manisa, western Turkey.

BACKGROUND & OBJECTIVES: Zoonotic diseases are well recognised threat to public health globally. The information of regional prevalence and associated risk factors allow the national programmes to determine and frame better strategies for their control, as they also provide the actual status of zoonosis in the region. The aim of this study was to determine the seroprevalence of West Nile virus (WNV), Crimean-Congo hemorrhagic fever virus (CCHFV), Francisella tularensis and Borrelia burgdorferi among the rural residents of Manisa region, Turkey and to identify the associated risk factors. METHODS: Cross sectional study was conducted in rural parts of Manisa, Aegean region of western Turkey in 2012. Blood samples from 324 randomly selected subjects were screened for the presence of IgG antibodies to WNV, CCHFV, F. tularensis and B. burgdorferi with commercially available kits. The demographic structure of the rural residents and risk factors related to lifestyle such as outdoor agriculture activities, animal husbandry, hunting and history of tick bite were questioned and their relationships with positive results were analyzed statistically. RESULTS: It was observed that 49 subjects (15%) had IgG antibodies to at least one of the zoonotic agents studied. The seroprevalence of F. tularensis was highest with a percentage of 7.1% (n = 23). Distribution of the positive results for WNV, CCHFV and B. burgdorferi were 4.3% (n = 14), 3.7% (n = 12) and 0.9% (n = 3), respectively. Older age and uncompleted secondary education were the statistically significant risk factors for seropositivity to at least one zoonotic agent investigated. Logistic regression analyses confirmed that older age (over 50) increased the risk of WNV and CCHFV seropositivity. INTERPRETATION & CONCLUSION: Seropositivity rates were not found to be higher than the expected rates. Further, studies are needed to evaluate the threat of vector borne zoonoses and associated risk factors in the study area.

[Comparison of interferon-gamma whole blood assay with tuberculin skin test for the diagnosis of tuberculosis infection in tuberculosis contacts]. / Temaslilarda tüberküloz enfeksiyonunun tanisi için interferon-gama tam kan testi ile tüberkülin deri testinin karsilastirilmasi.

Tuberculin skin test which is used for the detection of latent tuberculosis (TB), has many disadvantages such as false positivities due to cross reactions between environmental mycobacteria and BCG strain, false negativities due to immunosuppression and malpractice, and also difficulties in application and evaluation. Recently a new diagnostic test which measures the production of interferon (IFN)-gamma in whole blood upon stimulation with specific ESAT-6 and CFP-10 antigens of Mycobacterium tuberculosis has been introduced. Since most of the mycobacteria other than tuberculosis and BCG strain do not contain these antigens, the detection of IFN-gamma levels indicates the specific T-cell response against M. tuberculosis. The aim of the study was to compare the tuberculin skin test and whole blood IFN-gamma assay (QuantiFERON-TB Gold, Cellestis Ltd, Carnegie, Victoria, Australia) for the identification of latent TB infection in the contacts with active TB patients. The tests results were evaluated by using Kappa (K) analysis, and K coefficients of < 0.4, 0.4-0.75 and > 0.75 were accepted as poor, moderate and excellent agreements, respectively. A total of 233 subjects from three risk groups were included to the study. Group 1 included the household members (n = 133) who had contact with smear positive index cases, Group 2 included the subjects from community (n = 46) who had contact with smear positive index cases, and Group 3 included health care workers (n = 74) who had contact with TB patients or their specimens. The positivity rates of tuberculin skin test and IFN-gamma assay in the cases were found as 37% and 42%, respectively. There were no significant differences among the three patient groups with regard to the results of the tuberculin skin test (p > 0.05). However, the positive result of the IFN-gamma assay in Group 1 was found statistically higher than the other groups (51.3%, p = 0.013). A poor agreement between the two tests was detected in the results taken from 233 subjects (65.7%, K = 0.28), while agreement was moderate in unvaccinated group (72.7%, K = 0.44). Evaluation of agreement rates of the tests according to the risk groups yielded 64.6% (K = 0.3) for Group 1, 71.7% (K = 0.32) for Group 2, and 63.5% (K = 0.21) for Group 3, which all coefficients showed poor agreement. Although IFN-gamma blood assay has many advantages such as objective and quantitative results, no interference with vaccination due to the use of specific antigens and being practical, the high cost and the need for well-equipped laboratory are its disadvantages. As a result it was concluded that, IFN-gamma blood assay has limited value for the detection of latent TB infection in our country, since the prevalence of TB infection and BCG vaccination rates are high in Turkey.

Drug-resistant pulmonary tuberculosis in western Turkey: prevalence, clinical characteristics and treatment outcome.

BACKGROUND: Although high antituberculosis (anti-TB) drug resistance rates have been reported in Turkey, the clinical characteristics and implications for the outcome of anti-TB treatment have not been fully investigated. We determined the prevalence of anti-TB drug resistance and examined demographic data, clinical characteristics and treatment outcome in relation to patterns of resistance. METHODS: From the TB case registry of a university hospital and the two largest dispensaries in Manisa city, we identified all pulmonary TB cases with a culture-proven definitive diagnosis and antimicrobial susceptibility results for a 7-year period. We collected and analyzed demographic and clinical data and information on treatment outcome for those cases in relationship to anti-TB drug resistance. RESULTS: Of 355 M. tuberculosis strains, 71.5% were susceptible to streptomycin, isoniazid, rifampicin and ethambutol. Any drug resistance and multi-drug resistance (MDR) rates were 21.1% and 7.3% and were higher in males (53% and 9%, respectively) than in females (22% and 1%, respectively). Drug resistance was significantly higher in old cases (acquired drug resistance) vs new cases (primary drug resistance), and was associated with treatmentfailure (P<0.001). The prevalence of MDR was significantly higher in the old cases (22.4%) than in the new cases (4.4%) (P<0.001). Symptoms, radiographic findings, associated diseases, and sputum smear positivity were unrelated to the development of resistance. The prevalence of any drug resistance and MDR was significantly higher in those with treatment failure than in patients with treatment success. CONCLUSION: High resistance rates, particularly for acquired MDR, indicate a need for improvement in the TB control programme in our region.

Knowledge Level of the Primary Healthcare Providers on Chronic Obstructive Pulmonary Disease and Pulmonary Rehabilitation.

INTRODUCTION: Awareness of the healthcare providers on chronic obstructive pulmonary disease (COPD), which is an important cause of mortality and morbidity in our country and all over the world, and on pulmonary rehabilitation (PR) which plays an important role in its nonpharmacological treatment will provide effectiveness in diagnosis and treatment of COPD. The present study aimed at determining knowledge level of the healthcare providers about COPD and PR. MATERIALS AND METHODS: In this cross-sectional study, family practitioners and staff of home-care in central county of Manisa City were applied a questionnaire in order to determine their knowledge level on COPD and pulmonary rehabilitation during the in-service training on "pulmonary rehabilitation, home-care services for the pulmonary diseases, and respiratory exercises." RESULTS: 65.5% of the healthcare providers responded to the survey. Rate of those correctly knowing at least one of four items was 97.2%. No responder knew all items correctly. Average value for correct answers was 5.30 ± 2.1 (range: 1-10). The physicians, men, and those working in family health centers had higher level of knowledge on COPD compared to nonphysician healthcare providers (p = 0.006), women (p = 0.002), and those working in other practices (p = 0.019), respectively. CONCLUSION: Knowledge level of the primary healthcare providers on COPD and PR remains inadequate. Dynamic postgraduate training on this topic will be useful in referring the patients to centers giving service for this condition.

[Evaluation of malaria cases in Manisa from 2002 to 2004]. / Manisa ilinde 2002-2004 yillari arasinda saptanan sitma olgularinin degerlendirilmesi.

The province of Manisa is a relatively well developed agricultural and industrial center in western Turkey. There is a regular and extensive influx of workers from malaria-endemic regions of Anatolia to the province of Manisa during certain periods of the year, leading to contact between the local people and incoming workers. Major seasonal elevations can be detected in the prevalence of malaria in the province of Manisa and therefore an active fight against malaria is still carried out. In the present study, malaria cases detected and reported by the Malaria Control Dispensary of the Manisa City Health Centre during the last 3 years in Manisa have been evaluated. Comparison of present and prior data of malaria prevalence in Manisa has shown a remarkable decrease in recent years. A total of 14, 5 and 5 cases were reported in 2002, 2003 and 2004, respectively. Classification of the cases according to their origin (local or immigrant), age and the time diagnosis was also presented.