Научная статья на тему 'Динамические изменения в концентрации азотного диоксида в атмосферном воздухе в Старозагорском районе'

Динамические изменения в концентрации азотного диоксида в атмосферном воздухе в Старозагорском районе Текст научной статьи по специальности «Клиническая медицина»

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Ключевые слова
ЗАГРЯЗНИТЕЛИ ВОЗДУХА / АЗОТНЫЙ ДИОКСИД / СРЕДНЕМЕСЯЧ-НАЯ КОНЦЕНТРАЦИЯ / СРЕДНЕГОДОВАЯ КОНЦЕНТРАЦИЯ / AIR POLLUTANTS / NITROGEN DIOXIDE / MEAN MONTHLY CONCENTRATION / MEAN YEARLY CONCENTRATION

Аннотация научной статьи по клинической медицине, автор научной работы — Платиканова М. С.

Учитывая основные источники загрязнения воздуха (промышленные и автомобильные) в Старозагорском районе, в течении пяти лет просле-живается один из основных загрязнителей воздуха азотного диоксида. В настоящей работе обобщены и проанализированы динамические изменения в концентрации загрязнителей ежемесячно и ежегодно в периоде 2009-2013 года.

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Похожие темы научных работ по клинической медицине , автор научной работы — Платиканова М. С.

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DYNAMIC CHANGES OF THE CONCENTRATION OF NITROGEN DIOXIDE IN THE ATMOSPHERE IN THE MINICIPALITY OF STARA ZAGORA

When considering the main sources of air pollution in the Municipality of Stara Zagora (industrial plants and automobiles), one of the major pollutants-nitrogen dioxide-has been traced over a period of five years. The following report summarizes and analyzes the dynamic changes in the concentration of the pollutant on a monthly, quarterly and yearly basis for the time period 2009-2013.

Текст научной работы на тему «Динамические изменения в концентрации азотного диоксида в атмосферном воздухе в Старозагорском районе»

значительная доля вегетативной дисфункции, заболеваний инфекционно-воспалительного характера и сочетанных дисфункций тазовых органов, для которых свойственны моторные висцеральная гиперчувствительность и нарушения моторики, низкая толерантность к боли, отсутствие признаков активности воспалительного процесса. Следовательно, выявление и коррекция сопутствующих заболеваний и функциональных расстройств тазовых органов позволит улучшить результаты лечения больных хроническим циститом.

Литература

1. Горностаева Ю.А. Иммуномодулирующая терапия в клинической практике // Consilium Medicum. - 2008. - Т. 10,№10. - С. 18-21.

2. Infectious Diseases Society of America and the European Society for Microbiology and Infectious Diseases // Clin. Infect. Diseases. - 2011. - № 52 (5). - Р. 103-120.

3. Лоран О.Б., Синякова Л.А, Косова И.В. Рецидивирующие инфекции мочевых путей. - М.: Медицинское инф. агентство,

2008. - 29 с.

4. Неймарк А.И., Неймарк Б.А., Кондратьева Ю.С. Дизурический синдром у женщин. Диагностика и лечение. - М.:

ГЭОТАР-Медиа, 2010. - 256 с.

5. Biggs, W.S., Williams R.M. Common gynecologic infections // Prim. Care. -2009. - Vol.36, N1. - P.33-51.

6. Judlin, P.G. Current concepts in managing pelvic inflammatory disease // Curr Opin Infect Dis. - 2010. - Vol.23, N1. - P.83-87.

7. Кубин Н.Д. Современный патогенетический подход в лечении хронических воспалительных заболеваний мочевого пузыря: Автореф. дис. канд. мед. наук. - М., 2013. - 23 с.

8. Стрельцова О.С. Патогенетические аспекты лечения хронического цистита // Саратовский научно-медицинский журнал. -

2009. - Т.5, № 3. - С. 424-428.

9. Курносова Н.В. Актуальные аспекты фармакотерапии хронического цистита у женщин в стадии обострения // Саратовский научно-медицинский журнал. - 2010. - Т 6, № 3. - С. 705-708.

10. Сизов К.В. Структурная реорганизация слизистой оболочки мочевого пузыря при хроническом цистите и его коррекция: Автореф. дис. канд. мед. наук. - Новосибирск, 2012. - 23 с.

11. Birder, L.A., Hanna-Mitchell A.T., Mayer E. Cystitis, co-morbid disorders and associated epithelial dysfunction // Neurourol Urodyn. - 2011. -Vol. 30 (5). - P. 668-672.

12. Григорашвили И.И. Гиперактивный мочевой пузырь. Взгляд невролога // Фарматека. - 2008. - №1. - С.23-26.

13. Трубина Н.В. Нарушение нейрогуморальной регуляции в патогенезе, клинике и диагностике функциональных заболеваний желудочно-кишечного трата: Автореф. дис. канд. мед. наук. - Волгоград, 2009. - 22 с.

14. Goldstein, H.B., Safaeian K., Garrod P. Depression, abuse and its relationship to interstitial cystitis // Int. Urogynecol. J. Pelvic Floor Dysfunct. -2008. -Vol. 19, №12.- P. 1683-1686.

References

1. Gornostaeva Ju.A. Immunomodulirujushhaja terapija v klinicheskoj praktike // Consilium Medicum. - 2008. - T. 10,№10. - S. 1821.

2. Infectious Diseases Society of America and the European Society for Microbiology and Infectious Diseases // Clin. Infect. Diseases. - 2011. - № 52 (5). - R. 103-120.

3. Loran O.B., Sinjakova L.A, Kosova I.V. Recidivirujushhie infekcii mochevyh putej. - M.: Medicinskoe inf. agentstvo, 2008. - 29 s.

4. Nejmark A.I., Nejmark B.A., Kondrat'eva Ju.S. Dizuricheskij sindrom u zhenshhin. Diagnostika i lechenie. - M.: GJeOTAR-Media, 2010. - 256 s.

5. Biggs, W.S., Williams R.M. Common gynecologic infections // Prim. Care. -2009. - Vol.36, N1. - P.33-51.

6. Judlin, P.G. Current concepts in managing pelvic inflammatory disease // Curr Opin Infect Dis. - 2010. - Vol.23, N1. - P.83-87.

7. Kubin N.D. Sovremennyj patogeneticheskij podhod v lechenii hronicheskih vospalitel'nyh zabolevanij mochevogo puzyrja: Avtoref. dis. kand. med. nauk. - M., 2013. - 23 s.

8. Strel'cova O.S. Patogeneticheskie aspekty lechenija hronicheskogo cistita // Saratovskij nauchno-medicinskij zhurnal. - 2009. - T.5, № 3. - S. 424-428.

9. Kurnosova N.V. Aktual'nye aspekty farmakoterapii hronicheskogo cistita u zhenshhin v stadii obostrenija // Saratovskij nauchno-medicinskij zhurnal. - 2010. - T 6, № 3. - S. 705-708.

10. Sizov K.V. Strukturnaja reorganizacija slizistoj obolochki mochevogo puzyrja pri hronicheskom cistite i ego korrekcija: Avtoref. dis. kand. med. nauk. - Novosibirsk, 2012. - 23 s.

11. Birder, L.A., Hanna-Mitchell A.T., Mayer E. Cystitis, co-morbid disorders and associated epithelial dysfunction // Neurourol Urodyn. - 2011. -Vol. 30 (5). - P. 668-672.

12. Grigorashvili I.I. Giperaktivnyj mochevoj puzyr'. Vzgljad nevrologa // Farmateka. - 2008. - №1. - S.23-26.

13. Trubina N.V. Narushenie nejrogumoral'noj reguljacii v patogeneze, klinike i diagnostike funkcional'nyh zabolevanij zheludochno-kishechnogo trata: Avtoref. dis. kand. med. nauk. - Volgograd, 2009. - 22 s.

14. Goldstein, H.B., Safaeian K., Garrod P. Depression, abuse and its relationship to interstitial cystitis // Int. Urogynecol. J. Pelvic Floor Dysfunct. -2008. -Vol. 19, №12.- P. 1683-1686.

Платиканова М. С.

Главный ассистент, Кафедры "Гигиены, эпидемиологии и инфекционных болезней," Медицинский факультет, Тракийский

университет - Стара Загора

ДИНАМИЧЕСКИЕ ИЗМЕНЕНИЯ В КОНЦЕНТРАЦИИ АЗОТНОГО ДИОКСИДА В АТМОСФЕРНОМ ВОЗДУХЕ В

СТАРОЗАГОРСКОМ РАЙОНЕ

Аннотация

Учитывая основные источники загрязнения воздуха (промышленные и автомобильные) в Старозагорском районе, в течении пяти лет просле-живается один из основных загрязнителей воздуха азотного диоксида .

В настоящей работе обобщены и проанализированы динамические изменения в концентрации загрязнителей ежемесячно и ежегодно в периоде 2009-2013 года.

Ключевые слова: загрязнители воздуха, азотный диоксид, среднемесяч-ная концентрация, среднегодовая концентрация

Platikanova M. S.

Assistant Professor, Department of Hygiene, Epidemiology and Infectious Diseases, Medical faculty, Trace University, Stara Zagora DYNAMIC CHANGES OF THE CONCENTRATION OF NITROGEN DIOXIDE IN THE ATMOSPHERE IN THE

MUNICIPALITY OF STARA ZAGORA

Abstract

53

When considering the main sources of air pollution in the Municipality of Stara Zagora (industrial plants and automobiles), one of the major pollutants-nitrogen dioxide-has been traced over a period of five years.

The following report summarizes and analyzes the dynamic changes in the concentration of the pollutant on a monthly, quarterly and yearly basis for the time period 2009-2013.

Keywords: air pollutants, nitrogen dioxide, mean monthly concentration, mean yearly concentration

Nitrous oxides affect the weather patterns in the area by absorbing solar radiation of the ultraviolet and visible parts of the spectrum and by reducing atmospheric transparency [1]. In turn weather patterns affected by nitrous oxides cause a variety of health problems [12].

Of the nitrous oxides present in the atmosphere, of biological importance is nitrogen dioxide which has direct and indirect implications. Indirectly it is related to the formation of acid rain which in turn damages ecosystems, plays a role in the formation of the ozone layer in the troposphere and causes soil acidification [2]. The Stara Zagora municipality is one region where pollution from acid rain can be observed (3). Directly nitrogen dioxide affects human health. High concentrations of nitrogen dioxide in the air can increase the risk for respiratory infections. This is due to the pollutant’s negative effects on the immune system [5]. People with a history of respiratory disease such as asthma and COPD are even more sensitive to air polluted with nitrogen dioxide [4]. Registered levels of NO2and soot (which are a result of traffic pollution) led to an increased number of cases of conjunctivitis, mucus secretion, wheezing and increased levels of total serum immunoglobulin E [11]. Nitrous oxides also affect the heart and circulatory system. Research in Massachusetts has shown that cases of patients with heart arrhythmias who need defibrillation are closely related higher levels of nitrogen dioxide in the air [10]. Air pollution can also increase the risk for a stroke. Research in Georgia has shown that higher levels of nitrogen dioxide correlate to the number of patients diagnosed with PVD (thrombosis, vasculitis, stroke, etc.) who seek medical help [8]. High oncentrations of NO2 are also related to a higher stroke fatality rate in Shanghai, China and Sheffield, Great Britain [6,7]. A study in Italy shows that the number of adults seeking medical attention for head pain correlates with high levels of carbon monoxide and nitrogen dioxide [9]. Higher-than-normal concentrations of NO2 lead to psychiatric problems and more psychiatric hospital admissions. This was established back in 1979 in a psychiatric hospital in St. Louis, Missouri [12].

As a result of the actions of industrial plants and motor vehicles, nitrogen dioxide acts as one of the main atmospheric pollutants in the Municipality of Stara Zagora.

The goal of this report is to observe the dynamic changes in concentration of nitrogen dioxide monthly and yearly for the time period 2009-2013.

Materials and methods

On the territory of municipality Stara Zagora there are three NO2 sampling stations. One is the Automatic Measuring Station (AMS)-Zelen Klin. Another is Differential Optical Absorption Spectroscopy (DOAS) - Ostra Mogila in the village Ostra Mogila. The third is Differential Optical Absorption Spectroscopy (DOAS) -Mogila EKO1 in village Mogila.

Records of the Bulgarian United National System for Observtion and Control are used to calculate the mean concentration levels monthly and yearly for the time period 2009-2013.The medically statistical processing are made using data grouping, alternative and graphical analysis as well as analysis of dynamic changes.

Results and discussion

Bulgarian legislation establishes norms for sulfur dioxide, nitrogen dioxide, small dust particles, lead, benzene, carbon monoxide and ozone in the atmosphere.

The mean concentration of nitrogen dioxide is summarized for every month in the time period 2009-2013. The results are presented in Table 1 and illustrated in Figure 1.

Table 1. Mean monthly concentrations of NQ2(^g/m3) for the time period 2009-2013________________________________________________

Month/Station AMS -Zelen Klin DOAS-Ostra Mogila DOAS-Mogila EKO1

January 27,31 7,49 15,30

February 22,27 7,21 15,94

March 19,47 6,72 13,73

April 17,80 6,30 12,77

May 15,53 5,05 15,96

June 13,95 4,39 24,17

July 13,66 5,51 17,97

August 15,42 6,18 13,32

September 18,78 6,21 14,31

October 24,92 5,49 22,40

November 45,88 6,08 16,39

December 47,22 6,37 17,11

^^^DOAS - Ostra Mogila ^^^DOAS - Mogila EKO1 ^^AMS- Zelen Klin

54

period 2009-2013 by stations

Considerably higher average values (two or three times higher) are observed at AMS-Zelen Klin. It can be noted that highest mean values are observed during November and December (Figure 2). This is due to the two or three times higher values of NO2 during November and December of 2009 (87,04 ^g/m3 и 118,55 ^g/m3 respectively) and November, 2012- 65,32 ^g/m3. Bulgarian legislature for the norms of sulfur dioxide, nitrogen dioxide, small dust particles, lead, benzene, carbon monoxide and ozone in the atmosphere states that the mean hourly norm for NO2 of 200 ^g/m3 cannot increase more than eighteen fold during a period of one calendar year. Most likely the recorded concentration values are due to the gassing recorded in 2009 and 2012.

From the summarized data it can be seen that lowest values are recorded in DOAS - Ostra Mogila (4,39^g/m3) during the month of June (Table 1).

Fig. 2.Mean monthly concentrations of N02 (^g/m3) during the time period 2009-2013

In addition to the gassing, high values can also be attributed to household heating and motor vehicle traffic. AMS - Zelen Klin is in close proximity to several technical schools which give off emissions when heated. The station is also close to a busy road with heavy traffic.

When the mean yearly concentration values of NO2 are calculated, it can be noted that all values are less than threshold - 40 ^g/m3. The data are presented in Table 2 and Figure 3.

Table 2. Mean yearly concentrations of NQ2 (^g/m3) for the time period 2009

Year /Station AMS -Zelen Klin DOAS-Ostra Mogila DOAS-Mogila EKO1

2009 30,62 7,52 11,90

2010 21,78 5,48 12,67

2011 21,54 6,95 13,40

2012 27,38 6,93 17,90

2013 16,26 3,53 24,32

DOAS - Ostra Mogila —A— DOAS - Mogila EKO1 —AMS- Zelen Klin threshold

Fig. 3. Mean yearly concentrations of NQ2 (^g/m3) in the Municipality Stara Zagora

55

Figure 3 shows that at AMS - Zelen Klin in 2013 the average yearly levels of NO2 are much lower. This can be attributed to lower recorded pollution concentrations from July, 2013 to September, 2013.

Table 3.Mean yearly concentrations and standard deviation for NO2(^g/m3) in the Stara Zagora Municipality for the time period 2009-2013.

Year 2009 2010 2011 2012 2013

Station X Sx X Sx x Sx x Sx x Sx

DOAS-Ostra Mogila 7,52 0,66 5,48 0,37 6,95 0,25 6,93 0,392 3,53 0,64

DOAS -Mogila EKO1 11,90 1,32 12,67 0,75 13,40 1,06 17,90 1,35 26,53 5,57

AMS - Zelen Klin 30,62 10,14 21,78 1,12 21,54 1,36 27,38 3,94 16,26 2,24

Table 3 shows a decrease in variation of the pollutant NO2 from 2009 to 2013. The highest average value is for 2009- ( X + Sx ) - 7,52 ± 0,68 at DOAS - Ostra Mogila. The lowest average value is at the same station in 2013-3,53 ± 0,64.

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threshold

mean yearly concentrations

Fig. 4. Mean yearly concentrations of NO2(^g/m3) ) in the Stara Zagora Municipality for the time period 2009-2013.

A summary of the data for dynamic changes in mean yearly concentration levels for the period 2009-2013 are presented in Figure 4.A decreasing pattern is observed for the concentration levels of the pollutant.

Conclusion

1. Industrial plants, motor vehicles and decentralized heating are the major sources of pollution of the atmosphere over the Stara Zagora Municipality.

2. Higher levels of mean monthly concentrations values are observed during the cold months, but those levels are below the established threshold.

3. Mean yearly concentration levels are decreasing in the time period 2009-2013.

References

I. Manual of Applied Ecology, 2011, joint edition by Professor Yablanski, Professor Petkov, Thracian University-College of Agriculture, Norway program for cooperation with Bulgaria, Project: “Evaluation, Reduction and Prevention of Air, Water and Soil Pollution in the Stara Zagora Region”. Reference number 2008/115236

2. Turnovska T., 2012, Air Quality-Life Quality, Astra Press, Plovdiv

3. Tsonevski D., 1997, Ecological problems of the country and their effect on public health, Social medicine, 7-9.

4. Chen L. H., S. F. Knutsen, D. Shavlik, W. L. Beeson, F. Petersen, M.GhamsaryQ 2005, The association between fatal coronary heart disease and ambient particulate air pollution: are females at greater risk? Environ Health Perspect, 113:1723-9.

5. Kan H., В. Chen, 2003. Air pollution and daily mortality in Shanghai: a time course series. Arch Environ Health 58:360-7

6. Maheswaran R., Haining RP, Brindley P, Law J, Pearson T, Fryers PR, et al., 2005. Outdoor air pollution and stroke in Sheffield, United Kingdom. A small-area level geographic study. Stroke, 36:239-43.

7. Metzger K. B., P.E. Tolbert, M. Klein, J. L. Peel, W.D. Flanders, K. Todd, 2004. Ambient air pollution and cardiovascular emergency room visits. Epidemiology, 15:46-56.

8. Nattero G., А. Enrico, 1996.Outdoor pollution and headaches. Headache. 36:243-5.

9. Peters A., E. Liu, R. L. Verier, J. Schwartz, D.R. Gold, M. Mittleman et al., 2000. Air pollution and risk of cardiac arrhythmia. Epidemiology,11:11-7.

10. Roosbroeck Van S., R Li, G. Hoek, E. Lebrwt, B.Brunekreef, D. Spiegelman, 2008. Traffic-related outdoor air pollution and respiratory symptoms in children: the impact of adjustment for exposure measurement error. Epidemiology, 19, 3, 409-416219.

II. Strahilevitz M., A. Strahilevitz, J.E. Miller 1979. Air pollutants and the admission rate of psychiatric patients. Am J Psychiatry, 136:205-207

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12. Szyszkowicz M., 2008. Air Pollution and Daily Emergency Department Visits for Headache in Montreal, Canada. Headache: The Journal of Head and Face Pain, 48, 3, 417-423

Тосева Е.И.1, Тырновска Т.Х.2, Николов Д.Г.3

'Аспирант, Асистент, Факультет общественого здоровья, Медицинский университет - Пловдив, Болгария,

www. elka_toseva@abv.bg;

2Доктор медицинских наук, Профессор, Факультет общественого здоровья, Медицинский университет - Пловдив, Болгария;

3Главный асистент, Медицинский факультет, Медицинский университет - Пловдив, Болгария.

АНАЛИЗ РЕЗУЛЬТАТОВ ПЕРИОДИЧЕСКОГО МЕДИЦИНСКОГО ОСМОТРА РАБОТАЮЩИХ В ПРЕДПРИЯТИИ

ВОДОСНАБЖЕНИЯ И КАНАЛЛИЗАЦИИ В БОЛГАРИИ

Аннотация

Разумное использование водных ресурсов и их безопасность от загрязнения является не только экологической проблем, но и существенным фактором устойчивого экономического роста. В Болгарии не существует единной системы мониторинга для состояния здоровья рабочих. Цель этого исследования - анализировать состояние здоровья работающих в одном из крупнейших предприятий Болгарии по доставке и обработке питьевой воды и отходных вод. Постановка и методы: В 2012 году был проведен анализ моментной заболеваемости среди 193 работающих в предприятии „Водоснабжение и Канализация" (81 в секторе „Канализация” и 112 работающих в секторе „Водоснабжение”). Первичная информация по здоровью собрана из карт для периодического медосмотра. Работающие разделены по критериям: пол, возраст, должность в фирме, направление. Результаты: Общее число зарегистрированных заболеваний - 503 при 193 работающих. Относительная доля

зарегистрированных рабочих с отклонениями в состоянии здоровья в секторе „Водоснабжение” - 83.04%, в секторе „Канализация” - 85.19%. С наибольшей относительной долей в обоих секторах - Артериальная гипертония, Глухота, Нарушения рефракции и аккомодации, Ожирение. Заключение: 1. Наблюдается тенденция увеличения относительной доли патологического поражения с увеличением возраста выше 25 лет (p<0.001). 2. Анализ моментной заболеваемости всего лишь за 1 год не показывает убедительной связи между експозицией факторов рабочей среды и зарегистрированными болезнями. Под влиянием факторов в трудовой среде изменения по здоровью наступают за различный период времени (от нескольких месяцев до 5-ти лет). Поэтому считаем, что необходимо проводить анализ моментной заболеваемости за минимальный период 5 лет. Установлена высокая относительная доля работающих с потерей слуха в причинный комплекс которого вероятнее всего включается и высокий уровень шума в рабочей среде. 3. В Болгарии не существует единой статистической системы, которая следит моментную заболеваемость рабочих в целом и по отраслям, независимо от того, что этой деятелностью занимаются службы трудовой медицины.

Ключевые слова: водоснабжение, канализация, моментная заболеваемость, работающие.

Toseva E.L1, Turnovska T.H.2, Nikolov D.G.3

'PhD student, Physician, Assistant Professor at the Department of Hygiene and Ecological Medicine, Faculty of Public Health, Medical University - city of Plovdiv, Republic of Bulgaria. E-mail for contacts: www.elka_toseva@abv.bg;

2Doctor of Medical Sciences, Physician, Professor at the Department of Hygiene and Ecological Medicine, Faculty of Public Health,

Medical University - city of Plovdiv, Republic of Bulgaria;

3Physician, Head Assistant Professor at the Second Department of Internal Medicine, Faculty of Medicine, Medical University - city of

Plovdiv, Republic of Bulgaria

ANALYSIS OF THE RESULTS OF THE PERIODIC MEDICAL EXAM OF THE EMPLOYEES IN THE WATER SUPPLY

AND SEWERAGE COMPANY IN BULGARIA

Abstract

The sensible use of water resources and their protection from pollution is not only an environmental issue, but also an important factor for sustainable economic growth. In Bulgarian there is no unified system for monitoring the health status of the workers. The aim of this study is to analyse the momentary morbidity rate of the employees in one of the biggest companies for drinking water supply and waste water treatment in Bulgaria. Material and methods: Through 2012. is an analysis of the current prevalence among 193 working in Enterprise "water and sanitation" (81 persons in the wastewater treatment plant for wastewater (sewerage worker, operators, etc.) and 112 operating in the section "the extraction of drinking water". Primary health information collected from health cards for periodic medical examinations. Workers are separated by criteria: sex, age, position in the company direction. Results: the total number of registered diseases - 503 in 193 employees. The proportion of the registered working with abnormal health status in the sector "water supply" is at 83.04% of workers in the sector "Sewage" was 85.19%. With the large relative share in both groups are Arterial hypertension, Conductive and sensorineural hearing loss, Disorders of refraction and accommodation, Obesity. Conclusion: 1. A tendency of pathological affection relative share increase with age increase over 25 years is observed (p<0.001). 2. Momentary morbidity rate analysis for one year only failed to demonstrate a convincing relation between the exposure to occupational environment factors and the registered diseases. Health-related changes occur after various periods of time (from several months to 5 years) as a result of occupational environment factor impact. Therefore, in our opinion a momentary morbidity rate analysis for a minimum period of 5 years is necessary. A high relative share of the employees experiencing hearing loss is established, the causal complex of which most probably included the high level of noise in the occupational environment. 3. There is no integrated statistical system in Bulgaria to follow-up employee morbidity rate as a whole and by sectors, irrespective of the fact that occupational medicine services are being engaged with this activity.

Keywords: momentary prevalence working, sanitation, water supply.

The territory of the Republic of Bulgaria is divided in four Basin Directorates for Water Management. The second largest one is the East White Sea Region, located in a part of the Central South Bulgaria in 10 administrative counties, 92 municipalities, 1772 settlements and 20 Water Supply and Sewerage companies with 24 urban waste water treatment plants. Employee health status monitoring is being exercised by means of periodic medical exams, during which the abilities of the employees to fulfil their obligations in the specific industrial environment conditions having in mind their established health status are being assessed.

Disease occurrence is influenced not only by health culture, age, sex, individual lifestyle peculiarities, etc., but also by factors, such as length of service duration, work process characteristics and occupational environment conditions. The length of service at a particular workplace may be a ‘terrain’ on which any latently existing pathological deviations related to particular risk factors of occupation and environment may appear, or new ones may form. The purpose of this research is to analyse the momentary morbidity rate of the employees in one of the biggest companies for drinking water supply and waste water treatment in Bulgaria.

Materials and methods: The primary information on instantaneous disease rate was collected from the periodic medical exam records, which was regulated by the Bulgarian legislation [1]. The analysis was conducted pursuant to the following indicators: employees’ sex, relative share, age groups: up to 25 years old, from 26 to 35 years old, from 36 to 45 years old, from 46 to 55 years old, over 55 years old and a relative share of the groups, position and trend in which employee works. Data is processed by means of the descriptive statistic and relative share comparison methods.

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