scholarly journals Epidemiological characterization and risk evaluation associated with the presence of Megninia spp. in posture farms

2017 ◽  
Vol 47 (9) ◽  
Author(s):  
Tiago Mendonça de Oliveira ◽  
Cristina Mara Teixeira ◽  
Thiago Luiz Mendes Arcebispo ◽  
Karla Dias Antunes ◽  
Leandro do Carmo Rezende ◽  
...  
Keyword(s):  
Risk Factors ◽  
Correspondence Analysis ◽  
Risk Evaluation ◽  
Risk Index ◽  
Mineral Oil ◽  
Negative Effects ◽  
Secondary Database ◽  
Poultry Farms ◽  
Epidemiological Characterization

ABSTRACT: This study was accomplished with the aim to evaluate and to characterize the risks for the presence of Megninia spp. in poultry farms from Minas Gerais, using for that Correspondence Analysis (CA). A secondary database was used and adapted for this study, with information from 402 chicken houses of 42 laying hens commercial properties. Variables used to compose the correspondence model were selected through tests of Qui-square being considered the significant result of P≤0,05. A risk index was built to the presence of Megninia spp. starting from variables considered as risk factors for the presence of those ectoparasites. The CA graph produced for the epidemiological characterization of the presence of Megninia spp. presented an accumulated qui-square value of 58,55%. There was an association of the risk index with the age ranges of the poultry, among the presence Megninia spp. and the use of mineral oil and acaricide in the ration and; finally, an association between the ruddy ground-dove (Columbina talpacoti) presence and the absence of mites of the Megninia genus. The results supply knowledge on the epidemiology of Megninia spp. In addition, these information can contribute in the decision, reducing the risks of possible infestations in poultry farms and the negative effects of that parasitism.

scholarly journals Epidemiological characterization and risk evaluation associated with the presence of Phthiraptera in poultry farms from Minas Gerais, Brazil

2019 ◽  
Vol 41 ◽  
pp. e47474
Author(s):  
Tiago Mendonça de Oliveira ◽  
Cristina Mara Teixeira ◽  
Mariana Olímpia Köhler Marra Pinto ◽  
Thiago Luiz Mendes Arcebispo ◽  
Amanda Soriano-Araújo ◽  
...  
Keyword(s):  
Multiple Correspondence Analysis ◽  
Risk Index ◽  
Productivity Loss ◽  
Minas Gerais ◽  
Negative Effects ◽  
Chi Square ◽  
Poultry Farms ◽  
Biting Lice ◽  
Weight Decrease ◽  
Epidemiological Characterization

Phthiraptera are lice highly adapted to living as permanent and obligatory ectoparasites of birds and mammals. High infestations by biting lice contribute to the low productivity, loss quality of the eggs, besides weight decrease of chickens. Therefore, this study aimed to evaluate and to characterize the risks involved with the presence of biting lice in laying chicken from Minas Gerais, Brazil, throught a Multiple Correspondence Analysis (MCA). A secondary database with information regarding 402 chicken houses from 42 properties of laying hens from the same region was used and adapted for this study. The variables that composed the correspondence model were selected through Chi-square tests (p ≤ 0.05). A risk index was designed to relate the presence of biting lice out of variables such as risk factors related to the presence of these ectoparasites. The MCA graphic designed to conduct the epidemiological characterization of the presence of biting lice presented a Chi-square accumulated value of 53.59%. There was an association between the risk index and the synanthropic birds, subsistence hens, presence of lice and other ectoparasites in shelters and ectoparasites control. These results provide knowledge about the Phthiraptera epidemiology. Besides that, this information may contribute to the decision-making process in order to reduce the risk of possible infestations in poultry farms and the negative effects of the infestations.

scholarly journals Epidemiological Characterization and Risk Assessment Associated with the Presence of Diptera Order in Laying Poultry Farms

2018 ◽  
Vol 46 (1) ◽  
pp. 8
Author(s):  
Tiago Mendonça de Oliveira ◽  
Cristina Mara Teixeira ◽  
Isabela De Lourdes Araujo ◽  
Leandro Do Carmo Rezende ◽  
Lucas Maciel Cunha ◽  
...  
Keyword(s):  
Laying Hens ◽  
Risk Index ◽  
Minas Gerais ◽  
The State ◽  
Negative Effects ◽  
Chi Square ◽  
Poultry Farms ◽  
Belo Horizonte ◽  
Productivity Indicators ◽  
Epidemiological Characterization

Background: Health aspects of flocks of laying chickens, such as the occurrence of infestations by parasites and poultry pests, influence significantly the productivity indicators. In recent years, Brazilian poultry has gone through a scientific and technological evolution which resulted in high density poultry hens in the laying sheds and an increase of the occurrence of ectoparasites such as Diptera. The presence of these flies have caused negative impacts for poultry farming, since these may be responsible for the increase of stress and disease emergence and, in addition, reduction of productivity. In this context, the control of synanthropic Diptera is one of the challenges of the poultry farmers and professionals of this area. This study was carried to assess and characterize the risks for the presence of flies in chicken houses of laying farms in the state of Minas Gerais.Materials, Methods & Results: Was used a secondary database and adapted for this study, with information from 402 chicken houses of 42 laying hens commercial properties. The variables used to compose the correspondence model were selected through chi-square tests (P ≤ 0.05). A risk index was built to the presence of flies from variables considered as risk factors for these ectoparasites. In addition, a study of the spatial analysis was carried to evaluate the intensity of chicken houses of poultry farms with the presence of flies. For this, a Kernel map was produced using the QGIZ 2.18.1 software, georreferencing the regions of state of Minas Gerais that have these ectoparasites. It was observed the presence of flies in 253 chicken houses evaluated, which corresponds to a frequency of 62.9%, with the most present flies were Chrysomya spp. 37.3%, M. domestica 34.3%, Fannia spp. 16% and Stomoxys spp. 14%. The graph of the correspondence analysis produced for the epidemiological characterization of the presence of flies presented an accumulated chi-square value of 56.05%. There was an association of the risk index with removal interval and the humidity of the manure and with the type of installation of chicken houses. Farms with chicken houses that create their birds on the ground present a lower risk for the presence of Diptera. In addition, when the removal of the manure is performed manually and is not done periodically, the presence of flies in the chicken houses is observed. It was verified that clusters located in the messoregion south/southwest of Minas Gerais and between the west and metropolitan mesoregion of Belo Horizonte with chicken houses that have the presence of flies.Discussion: The accumulation and permanence of manure can occur in less technical farms that have laying hens kept in confinement with high densities. In the case of Diptera, the greater the interval of removal of the manure below cages, the greater the risk for their presence, combined with the high densities of the birds that contribute to a faster accumulation of manure. The humidity of the manure is another important factor for the development of flies. The risk is high when chicken feces are liquefied, due to the fact that larvaes of flies need a moist substrate for survival. These results provide knowledge about the epidemiology of flies, in addition to demonstrate the profile of laying farms in the state of Minas Gerais. The implementation of certain management measures and the investment in technification of the chicken houses could reduce the risks of possible infestations in the flocks, besides the negative effects resulting from this ectoparasitism.

scholarly journals Epidemiological characterization of leptospirosis in horses in the state of Pernambuco, northeastern Brazil

2016 ◽  
Vol 83 (0) ◽  
Author(s):  
José Romero Alexandre Alves ◽  
Kalyne Danielly Silva de Oliveira ◽  
Diego Figueiredo da Costa ◽  
Leise Gomes Fernandes ◽  
Severino Silvano dos Santos Higino ◽  
...  
Keyword(s):  
Risk Factors ◽  
Odds Ratio ◽  
Epidemiological Survey ◽  
Agglutination Test ◽  
Northeastern Brazil ◽  
Rodent Control ◽  
Isolation And Characterization ◽  
Leptospira Spp ◽  
Epidemiological Characterization

ABSTRACT: An epidemiological survey aiming to determine the occurrence of anti-Leptospira antibodies and to identify risk factors was carried out in horses of the Pajeú microregion, state of Pernambuco. Sera from 100 horses from 38 properties in four counties in the region were examined by the microscopic agglutination test (MAT), using 24 Leptospira spp. serovars as antigens. Of the 100 samples tested, 28 (28%) were positive. Most prevalent serovars were Patoc (35.71%), Butembo (32.14%) and Sentot (14.30%). Supply of pasture as forage (odds ratio =7.80; 95% confidence interval - 95%CI 1.71-35.50; p=0.008) was identify as risk factor. It is suggested the need for studies on agent isolation and characterization of its pathogenicity, as well as it is recommended the rodent control in deposits of feed and environment.

Fatigue damage risk assessment of airport concrete runway based on intelligent algorithm

2021 ◽  
pp. 1-11
Author(s):  
Fu Shuai ◽  
Sheng Kai ◽  
Si Qingmin ◽  
Guo Xinyao ◽  
Wang Feiyin
Keyword(s):  
Risk Factors ◽  
Fatigue Failure ◽  
Risk Evaluation ◽  
Evaluation Method ◽  
Safety Management ◽  
Risk Index ◽  
Layer By Layer ◽  
Threshold Method ◽  
Failure Risk ◽  
Management Measures

Fatigue failure issues of runway at airports have become one of core tasks in airport safety management. How to recognize fatigue failure risk factors of concrete runways at airports and implement a quantitative assessment on failure risks of runways is a key topic that is studied in the industrial circle and academic circle at present. For this reason, an integral analysis on internal and external causes of fatigue failure of runways was carried out, which recognized and extracted 18 risk factors. Evaluation values of quantitative risk factors were calculated through a threshold method and evaluation values of qualitative factors were determined by expert scoring. Subsequently, weights of all risk factors were given by G1 method. Finally, the comprehensive risk evaluation value of concrete runways was gained through layer-by-layer coupling. A case study was carried out in the A airport. Results show that the calculated comprehensive risk evaluation value of fatigue failure of concrete runways at airports by the proposed method is basically consistent with engineering objective practical value. The proposed method is expected to be applicable in other airports. The comprehensive risk evaluation value of the concrete runway failure at A airport is 0.49, indicating certain risks of fatigue failure. It is necessary to adopt engineering and management measures according to risk factors with large evaluation values to control the fatigue failure risks. This study concludes that the proposed fatigue failure risk index system of concrete runway of airports is scientific and effective. Moreover, the proposed risk evaluation method is feasible and it provides a new idea and method to fatigue failure risk evaluation of concrete runways at airports.

Risk assessment on drug production safety based on Grey-Analytic Network Process

Kybernetes ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jiaojiao Ge ◽  
Benhong Peng ◽  
Guo Wei ◽  
Anxia Wan
Keyword(s):  
Risk Factors ◽  
Risk Evaluation ◽  
Risk Index ◽  
Analytic Network Process ◽  
Risk Level ◽  
Safety Risk ◽  
Content Type ◽  
Drug Production ◽  
Production Safety ◽  
Network Process

PurposeTo strengthen the correlation analysis on risk factors of drug production safety and reduce the influence due to fuzzy judgments, a safety risk assessment method based on Grey-Analytic Network Process (G-ANP) is proposed.Design/methodology/approachFirst, an index system evaluating drug production safety risk is constructed according to the “Good Manufacture Practice of Medical Products,” next the influence weight of each risk index is derived by using the Analytic Network Process, then the grey number of each risk index is determined by further utilizing the grey statistical theory, and finally the risk level of drug production is obtained.FindingsAn empirical study is conducted and the results support the feasibility and practicability to use G-ANP method for drug production safety risk evaluation. The results of the case show that it is feasible and practical to use G-ANP method for drug production safety risk evaluation.Originality/valueThe innovation lies in the use of G-ANP method to fully consider the interdependence and interaction between the risk factors of drug production safety, which improves the objectivity in judging the risk level of drug production and provides a scientific basis for pharmaceutical manufacturers to formulate further decisions and management in the case of insufficient quantification of risk factors. Based on the findings, more targeted suggestions are made to reduce the production risk of pharmaceutical enterprises.

Epidemiological Characterization of the Infection by Treponema Pallidum in Pregnant Women in Beira City, Sofala, Mozambique

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Nchowela Guido
Keyword(s):  
Pregnant Women ◽  
Congenital Syphilis ◽  
Health Centre ◽  
Treponema Pallidum ◽  
Timely Manner ◽  
Pregnancy And Childbirth ◽  
Epidemiological Characterization ◽  
Active Syphilis ◽  
Structured Questionnaire

Introduction: Syphilis is one of several diseases that can be transmitted during pregnancy and childbirth, which can lead to complications during pregnancy and in the newborn. This is especially so when the pregnant woman is not diagnosed or treated properly and in a timely manner. Methodology: Data from 262 pregnant women prospectively included, aged 18-41years, attended at the Ponta Gêa Health Centre for antenatal clinics has been analyzed from January to September of 2016. In the prospective study, a rapid treponemal and a non-treponemal test were performed. A structured questionnaire was used to collect socio demographic and clinical variables, which was developed from the literature review. Results: The prevalence of active syphilis was 11.8%; the majority of reactive pregnant women were aged 18-25years (55.4%), (61.3%) of pregnant women were treated with doses below those recommended; only a small number of the partners were treated successfully. The highest seroprevalence of syphilis was found in housewives (77%), in those who attended primary education (71.6%) in those who had a monthly income of 1000- 3000 MZN (70.3%), in those with two or more pregnancies (55.7%) and living with someone has husband and wife (63.5%). The syphilis/HIV co-infection rate was high. Conclusion: According to the results obtained in this study, urgent measures are needed to assess the problems encountered and to improve the screening approach, treatment and monitoring of syphilis during pregnancy in order to prevent the cases of congenital syphilis.

Complex evaluation of health state of population residing under combined exposure to noise and chemical risk factors caused by activities of major airport hub

2019 ◽  
pp. 12-16 ◽  
Author(s):  
Konstantin P. Luzhetsky ◽  
Ol’ga Yu. Ustinova ◽  
Svetlana S. Kleyn ◽  
Dmitrii N. Koshurnikov ◽  
Svetlana S. Vekovshinina ◽  
...  
Keyword(s):  
Risk Factors ◽  
Nervous System ◽  
Serum Level ◽  
Reference Group ◽  
Risk Index ◽  
Case Based Reasoning ◽  
Health State ◽  
Upper Respiratory Tract ◽  
Combined Exposure ◽  
Complex Evaluation

Complex evaluation covered health state of population residing under combined exposure to physical (noise) and chemical (manganese, formaldehyde, phenol, benzene) risk factors caused by airport activities. Findings are unacceptable chronic risks expressed through risk index for development of nervous system diseases (HI=9.45–51.75), respiratory disorders (HQ=2,62–6,95) and immune system ailments (HQ=1,75–4,23). In children, functional disorders of nervous system (parasympathetic type vegetative dystonia) and respiratory organs (chronic disorders of upper respiratory tract) are diagnosed 1,5–1,8 times higher than those in the reference group; over 5% of children aged 4–7 years demonstrate bilateral conductive deafness. Reliable cause-effect relationships were revealed between functional nervous system disorders (parasympathetic type vegetative dystonia, astheno-neurotic syndrome, vascular cephalgia, sleep disorders) and increased serum level of manganese and benzene (proportion of explained dispersion, R2=0,55–0,87, 26,44≤F≥389,54), between respiratory diseases (chronic rhinitis, chronic pharyngitis) and increased serum level of formaldehyde (R2=0,73–0,91; 350,8≤F≥778,3), with high statistic significance (p < 0,0001). For sanitary epidemiologic examination purposes, case-based reasoning for relationships of children health disorders, management decisions, the authors suggested and justified a list of parameters for negative combined impact of risk factors caused by airport hub.

Prioritizing strain insulators for raptor conservation

2021 ◽  
pp. 1-16
Author(s):  
FRANCISCO GUIL ◽  
M. ÁNGELES SORIA ◽  
VÍCTOR ORTEGA ◽  
RUBÉN GARCÍA-SÁNCHEZ ◽  
SILVIA VILLAVERDE-MORCILLO
Keyword(s):  
Methodological Approach ◽  
Risk Index ◽  
Influential Factors ◽  
Negative Effects ◽  
Central Spain ◽  
Novel Approach ◽  
Conservation Actions ◽  
Complete Survey ◽  
Raptor Conservation ◽  
Management And Conservation

Summary Avian species often take advantage of human-made structures, such as perching on power poles, although this can lead to negative effects for both birds and infrastructure. It has been demonstrated that anchor-type pylons, with strain insulators, are amongst the most dangerous of these structures. Our goal was to develop a methodological approach to evaluate the ways in which raptors perch on the six most commonly used strain insulator configurations in Spain, and to build a risk index that can be used to prioritise them. To study the ways raptors perch, we worked with six wildlife rescue centres in central Spain for almost a year assessing these six strain insulator configurations in 83 perch trials with 176 raptors in ample flying pens. We analysed 475 complete survey days, with an approximate number of 258,960 analysed pictures, including 6,766 perchings on strain insulators. We assessed the influential factors for these 6,766 perchings and developed a novel approach to prioritise strain insulator configurations that can be used anywhere. Our results suggest that longer insulator strains (i.e. PECA-1000 and Caon-C3670) are the safest, according to our prioritization criteria, although these results require further assessment in the field. Managers and conservationists should take into account these results to improve management and conservation actions.

Epidemiology Of Myocardial Infarction: Magnitude Of The Problem, Cause And Risk Factors

1981 ◽  
Author(s):  
W B Kannel
Keyword(s):  
Risk Factors ◽  
Risk Evaluation ◽  
Death Rate ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Hdl Cholesterol ◽  
Joint Effect ◽  
Low Density Lipoprotein Cholesterol ◽  
The Impact ◽  
Marginal Risk

Coronary heart disease is a common, highly lethal, disease which frequently attacks without warning and too often presents with sudden death as the first symptom. Chances of an American male developing CHD before age 60 are one in five.Most angina, infarctions and sudden deaths represent medical failures which should have been forecasted and prevented. About 30% of first MI's will shortly develop angina and experience a per annum death rate, half of which will be sudden deaths. Reinfarctions will occur at 6% per year and half the recurrences will be fatal.No major innovations are needed to identify coronary candidates or to establish their risk from the joint effect of known risk factors. However, all have much to learn about motivating changes in behavior required to control the major risk factors such as cigarette smoking, faulty diet, overweight, sedentary living, abnormal lipids, hypertension and impaired glucose tolerance.Low density lipoprotein cholesterol promotes atherogenesis whereas HDL-cholesterol is protective, and the net effect is judged by their ratio. Hypertension, systolic or diastolic, labile or fixed, at any age in either sex is a powerful contributor to CHD. The impact of diabetes is greater for women, diminishes with age and varies depending on coexisting risk factors.Optimal risk evaluation requires quantitative combination of risk factors so as to include persons with multiple marginal risk factor abnormalities who are at high risk.

scholarly journals A risk index for COVID-19 severity is associated with COVID-19 mortality in New York City

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Wil Lieberman-Cribbin ◽  
Naomi Alpert ◽  
Raja Flores ◽  
Emanuela Taioli
Keyword(s):  
Risk Factors ◽  
New York ◽  
New York City ◽  
York City ◽  
Underserved Populations ◽  
Risk Index ◽  
Data Repository ◽  
Severe Illness ◽  
Mortality Data ◽  
Cross Sectional

Abstract Background New York City (NYC) was the epicenter of the COVID-19 pandemic, and is home to underserved populations with higher prevalence of chronic conditions that put them in danger of more serious infection. Little is known about how the presence of chronic risk factors correlates with mortality at the population level. Here we determine the relationship between these factors and COVD-19 mortality in NYC. Methods A cross-sectional study of mortality data obtained from the NYC Coronavirus data repository (03/02/2020–07/06/2020) and the prevalence of neighborhood-level risk factors for COVID-19 severity was performed. A risk index was created based on the CDC criteria for risk of severe illness and complications from COVID-19, and stepwise linear regression was implemented to predict the COVID-19 mortality rate across NYC zip code tabulation areas (ZCTAs) utilizing the risk index, median age, socioeconomic status index, and the racial and Hispanic composition at the ZCTA-level as predictors. Results The COVID-19 death rate per 100,000 persons significantly decreased with the increasing proportion of white residents (βadj = − 0.91, SE = 0.31, p = 0.0037), while the increasing proportion of Hispanic residents (βadj = 0.90, SE = 0.38, p = 0.0200), median age (βadj = 3.45, SE = 1.74, p = 0.0489), and COVID-19 severity risk index (βadj = 5.84, SE = 0.82, p <  0.001) were statistically significantly positively associated with death rates. Conclusions Disparities in COVID-19 mortality exist across NYC and these vulnerable areas require increased attention, including repeated and widespread testing, to minimize the threat of serious illness and mortality.

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