Microsoft Word - 4- Dr Hanafi RTL.doc Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 31 Original Article Malaria Situation Analysis and Stratification in Bandar Abbas County, Southern Iran, 2004–2008 *AA Hanafi-Bojd1, H Vatandoost1, E Philip2, E Stepanova3, AI Abdi4, R Safari5, GH Mohseni5, MI Bruhi6, A Peter7, SH Abdulrazag8, G Mangal9 1Department of Medical Entomology & Vector Control, School of Public Health, Tehran University of Medical Sciences, Iran 2Torit State hospital, Ministry of Health, Eastern Equatoria State, Government of South Sudan 3Martinoskvy Institute, Moscow, Russia 4Ministry of Health, Somalia 5Province Public Health Centre, Hormozgan University of Medical Sciences, Bandar Abbas, Iran 6Senior Evaluator of Malaria Control Program, SINDH province, Pakistan 7Acting Director General for Malaria Control Program, Upper Nile State- Malakal, State Ministry of Health,Government of South Sudan 8Ministry of Health, Republic of Sudan 9Health Center of Khost province, Afghanistan (Received 5 Apr 2010; accepted 19 May 2010) Abstract Background: The aim of this study was that the past five years data were collected to analyze the situation of ma- laria and health facilities in this area for better understanding malaria problem and to find solutions. Methods: In this retrospective study data of the last 5 years were obtained from health center of Bandar Abbas, pub- lished papers and reports, weather forecasting organization of the city and annual reports of Hormozgan official authorities. An excel databank was created and analysis was conducted using this software. Results: According to the national health system, Bandar Abbas also has referral net work system from periphery to the district health center. The maximum and minimum Annual Parasitic Index (API) were observed in 2005 (1.31) and 2008 (0.17), respectively. The prevalence of cases in villages was more than city, except for 2008. More than 97.6% of indigenous malaria cases were caused by Plasmodium vivax, although P. falciparum, P. ovale and mix infection were also reported. Anopheles stephensi, An. dthali and An. fluviatilis are the main malaria vectors in rural area, while only the first species is distributed in the urban area. Conclusion: According to results and many variables including API, Bandar Abbas is divided in two strata. From the situation analysis of Bandar Abbas it is postulated that the main activities of this district could be accuracy of data, and malaria vector control. Keywords: Malaria stratification, Iran Introduction Malaria disease is a worldwide prob- lem that can be found in vast area of the world, where great portions of population are at risk. Unfortunately number of people lost their live because of this disease, and still it is one of the main problems in global health. The disease is transmitted by a variety of female Anopheline mosquitoes (WHO 2009). Iran is one of the countries that face this problem. Before starting any malaria con- trol program in Iran about 60% of population of the country was living in endemic areas *Corresponding Author: Mr Ahmad Ali Hanafi-Bojd, E-mail: aahanafibojd@tums.ac.ir Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 32 with 30 to 40% malaria morbidity (Edrissian 2006). Iran has been classified into four dif- ferent strata according to the epidemiology of the disease (Raeisi et al. 2004). At present, malaria problem in Iran is mostly concen- trated in southern part. More than 90% of cases are reported from Sistan and Baluchis- tan, Kerman and Hormozgan Provinces in south-east of the Country (Moosa-Kazemi et al. 2007). It is unstable with two seasonal peaks mainly in spring and autumn. Outbreaks due to P. vivax usually occur after rainy season (Manouchehri et al. 1992). In this part of the country six anopheline mosquitoes including Anopheles culicifacies, An. stephensi, An. dthali, An. fluviatilis, An. superpictus are known proven vectors. Anopheles pulcherri- mus was mentioned as suspected malaria vector (Jalali-Moslem 1956, Manouchehri et al. 1972, Eshghi et al. 1976, Manouchehri et al. 1992, Zahirnia et al. 2001, Edrissian 2006). The national strategy on malaria was revised in 2006, with the goal of eliminating of Plas- modium falciparum malaria in 3–4 yr and only introduced cases of P. falciparum might occur, further reducing the number of auto- chthonous P. vivax malaria in a period of 7 yr. In the third stage of the new strategy, the objective will be a drastic reduction of local transmission of P. vivax in the residual and active malaria foci. At the end of the third stage only 500–700 autochthonous cases could be reported in the country per year. Reported studies in 2008 show that out of 11460 malaria cases of Iran, 8% was due to P. falciparum, while 90% were infected by P. vivax (Minsitry of Health 2008). In WHO malaria report 2009, Iran showed evi- dence of a sustained decrease in the number of cases associated with wide scale implemen- tation of malaria control activities. This country is classified as in the pre-elimination stage (WHO 2009). The aim of conducting a situational ana- lysis is to systematically understand the ma- laria epidemiology of an area in a very short space of time and the health status, system and resource available for controlling the dis- ease. In succession to planning to go to the district, there is need to use of the information that is already available and analyzing in such a way to understand the problems. The main objective of the situational analysis is to col- lect the data from respective references such as: health network office, hospital, health cen- ters, communities, metrology department and others for conducting anti-malarial measures. Bandar Abbas is the most important seaport of Iran in northern part of the Persian Gulf. This city has thousands of passengers from different parts of Iran, as well as ship- men and immigrants from malarious areas of different countries. Regarding to favorable con- ditions for malaria transmission, the city can be an important focus for the disease in southern Iran. The aim of this study was that the past five years data were collected to ana- lyze the situation of malaria and health facili- ties in this area for better understanding ma- laria problem and to find solutions. Materials and Methods Study area Hormozgan Province covers an area of 71139.62 km2. It is located in south of Iran and north of the Persian Gulf. Bandar Abbas is the capital city of the province. It is lo- cated in southern part of this province be- tween 54o 53’–56 o 03’ E and 26 o 53’–27 o31’ N on flat ground with an average alti- tude of 9 m above sea level. The nearest ele- vated area is Geno Mountain, 17 km north of Bandar Abbas. The city has a hot and humid climate. Maximum temperature in summers can reach up to 49° C while in winters the minimum temperature drops to about 5° C. The average of total annual rainfall was 118.44 mm during 2004–2008 and the mean annual relative humidity was 63.4% (www.weather.ir). In 2008 total population was 521657, from which 47% female and 53% male. About 77% Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 33 of population of this district is living in ur- ban area and 23% in rural area. Foreign po- pulation in this year was 15087 (Management and Programming Organization 2008). Data collection This study was a retrospective survey conducted using data obtained from health net- work of Bandar Abbas, as well as published documents on weather, population, history of malaria and previous studies on malaria in this area. The data bank was created in Excel software. Situation analysis and stratification was conducted based on the obtained data. Results Health system and general health profile Health care and public health services in Iran are provided through a national wide net. This network consists of a referral system starting from primary care center in the pe- riphery going through secondary hospital in the capital and tertiary hospital in major cities. The public sector provide primary, secon- dary and tertiary health services and some of these services such as prenatal care and vac- cination are free of charge (Table 1). The private sector plays a significant role in the health care focused on secondary and tertiary health care in urban areas. There are also many non-governmental organizations acting in health issue in Iran. They provide activities in special field like children with cancer, dia- betes and thalassemia. There is one university for medical sciences education in Bandar Abbas and health network is working under vice chancellor for health. Bandar Abbas health facilities during our study period are showed in Table 1 (Man- agement and Programming Organization 2004-2008). Malaria situation Cases: Based on our findings the ma- laria cases in Bandar Abbas City are mainly coming from rural areas and from other coun- tries such as Afghanistan and Pakistan, but in rural area most of cases are due to local transmission. All these cases are diagnosed by taking blood and then examined microscopi- cally, and then reported and treated in the public centers. All these activities are free of charge. Usually the cases from the health house reach the health centers within same day and about 80% of slide positive cases (slide ex- amination take less 30 min) get treatment within 24 h according to national guideline. In those areas which are not covered by primary health care system, the anti-malaria activities carried by mobile team. The private sectors can investigate the cases but should refer them to the public sectors for treatment. Bandar Abbas is divided into 19 areas for malaria detection and treatment (Fig. 1). During 2004–2008 a total of 1519 cases were reported to be positive out of 140620 taken slides (Table 2). Most of cases were Iranian (79.3%). The disease morbidity in- creased up to 2005 and after that had a de- creasing trend to 2008. Plasmodium vivax was the main causative agent of malaria in Bandar Abbas (97.69%), followed by P. fal- ciparum (2.17%). There was also one mixed infection case and a report of malaria due to P. ovale detected in an African football player came to Bandar Abbas in 2008. Cases re- ported in rural area of Bandar Abbas (64.3%) were more than urban area (35.7%). Most of cases (70.7%) had over 14 yr old. Males (64.5%) were infected more than females (35.5%). The transmission season was mainly between April and November (Fig. 2). Vectors Previous studies in the area show that Hormozgan Province has five Anopheles vec- tor species, the most important of them are Anopheles stephensi, An. fluviatilis and An. dthali. Anopheles stephensi is the main malaria vector in Bandar Abbas region, mainly can be Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 34 found in south urban part, flat and the coastal areas. It considers being endophilic, but biting outdoor during summer months. Its seasonal activity started at beginning of May reach the peak in August and gradually decrease up to December in the mountainous area, but in the coastal areas it is active all the year with two peaks one in the April–May and second in the August up to September (Manouchehri et al. 1976a). Another study reported the peak of activity in September in mountain- ous and October in coastal regions. This spe- cies is absent during the cold winter months, but has high density during spring and au- tumn in mountainous and coastal region, re- spectively (Vatandoost et al. 2006). The larva can be found in different bodies of water. In rural areas, it is found in pool streambeds at the margin of the streams, in the seepage and marshy area with gentle flow water, animal hoof print, and around the seepage marsh area (Vatandoost et al. 2004, Vatandoost et al. 2006). Sporozoite rates for An. stephensi were reported 0.2–1.8% from southern part of Iran (Jalali-Moslem 1956). Anopheles dthali plays a secondary role as malaria vector in Bandar Abbas after An. stephensi. It is found mainly in Siahoo mountainous area, north of Bandar Abbas city. This Anopheles has two peaks of activ- ity during autumn (December-February) and absent during cold winter and hot weather (June-August). The mosquito is resting outdoor in animal house as well as human dwelling (Vatandoost et al. 2007). In rural area of Bandar Abbas, the anthropophilic index and sporo- zoite rate in salivary glands for this species is reported 25% and 1.4%, respectively (Manou- chehri et al. 1972). The larvae of An. dthali are found in mineral water in high salinity with tempera- ture of 13–28o C and pH of 6.9–8. The larva is most abundant in September and October which is the end of hot season in Bandar Abbas (Vatandoost et al. 2007). Anopheles fluviatilis is also secondary vector with An. dthali, distributed in moun- tainous area from the east to west of Hor- mozgan Province. This species is exophilic, exophagic and zoophilic (Naddaf et al. 2003) with larval habitat in slow moving water on margin of river, stream with or without ve- getation with high dissolved oxygen and pits around springs. The biting of this species on human bait started from 18.00 h and contin- ued until 04.00 h, but most of bites on human and cow bait took place in the first half of the night, and there was no bite after 04.00 h (Manouchehri et al. 1975a). Seasonal activ- ity of An. fluviatilis showed two peaks in November and May. This species was active throughout the night with one peak of blood meal, 22:00–23:00 h on animal and 24:00– 01:00 h on human (Edalat and Moosa-Kazemi 2005). Sporozoite rate of this species is re- ported between 1.7–11% in south of Iran (Eshghi et al. 1976). Vector control The past program for malaria eradica- tion in Iran was based on vector control us- ing very large quantities of DDT started in 1949 which resulted in dramatic reduction in malaria incidence. Vector population recovery happens mainly due to resistant to DDT in Anopheles stephensi as well as DDT lack of selectivity affecting target population of mos- quito (Edrissian 2006). Therefore, other in- secticide belongs to organophosphate, orga- nochlorine, carbamate and pyrethroid were used in following years. However, extensive use of chemical insecticides against mosquito vectors for about four decades has resulted in resistance to DDT, dieldrin and malathion (Maouchehri et al. 1992, Edrissian 2006). Susceptibility tests of insecticides against adult mosquitoes using standard impregnated pa- pers provided by WHO showed An. ste- phensi was resistance to DDT, dieldrin and malathion, while An. dthali and An. fluviatilis Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 35 are susceptible (Mofidi et al. 1958, Mofidi et al. 1960; Manouchehri et al. 1975b, Manouche- hri et al. 1976b, Vatandoost 2004; Vatan- doost and Vaziri 2004; Vatandoost and Borhani 2004; Vatandoost et al. 2005). In re- cent studies, it was found that the field sam- ples of An. stephensi from Bandar Abbas were resistant to DDT, dieldrin and fipronil, and susceptible to other insecticides includ- ing malathion in Bandar Abbas (Davari et al. 2006, Vatandoost et al. 2006,). There is also a newly report of tolerance to DDT and diel- drin from Kerman Province (Abai et al. 2008). Study on susceptibility status on An. fluviatilis to diagnostic dose of 10 insecticides includ- ing DDT 4%, dieldrin 4%, malathion 5%, feni- trothion 1%, propoxour 0.1%, bendiocarb 0.1%, permethrin 0.75%, deltamethrin 0.05%, lambda-cyhalothrin 0.05% and cyfluthrin 0.15% showed 100% mortality in all tests (Shahi et al. 2006). Evaluation of standard solutions of 5 larvicides against these 3 species from Ban- dar Abbas showed they were susceptible (Va- tandoost et al. 2004, Vatandoost and Hanafi- Bojd 2005, Hanafi-Bojd et al. 2006). Now the main measures in Iran for malaria vector control are: Indoor residual spraying using Lambda-cyhalothrin WP 10% and deltamethrin WP 10% in malarious areas, larviciding by Chlorpyrifos-methyl, Bacillus thuringiensis and some larvivorous fish like Aphanius dispar and Gambusia affinis and distributing LLINTs. At present, B. thuringien- sis and larvivorous fish are using for lar- viciding in the area as well as impregnated mosquito nets. This measure have been wel- comed by people at various level, it was been introduced in 2003 as ITNs and nowadays LLITNs are used in malarious areas of Iran (Moosa-Kazemi et al. 2007). In Bandar Abbas district, the main measures for vector control are Indoor Residual Spraying (IRS), larviciding and LLITNs. Dur- ing the period of our study, the vector control activity was restricted to some villages of mountainous area. Treated mosquito nets were used in May 2005 as ITNs when epidemic started in the area, but now LLITNs are using (personal communications). They are distributed accord- ing to the following priorities: Villages with- out electricity, active foci and high popula- tion movement; villages with electricity, ac- tive foci and high population movement; vil- lages with only one of the above mentioned factors; villages without electricity. Larviciding using B. thuringiensis is another vector control measure in the area. It is also limited to the infected villages of moun- tainous area, north of Bandar Abbas. In addi- tion some other measures are conducted for larval control. Treatment and drug resistance In Iran there is no recommended policy for chemoprophylaxis to the pregnant women and travelers. Quinine, chloroquine, fansidar, primaquine, artesunate, clindamycin, doxycy- chline and coartem are recommended for ma- laria treatment in Iran. They are used in dif- ferent combinations based on severity of the disease, age of patient and Plasmodium type. There is also special recommendation for preg- nant women (Saebi et al. 2006). Several studies were carried out on drug resistant in the southern part of Iran. The results of studies during 1968–1976 (Manou- chehri et al. 1973, Sutoso et al. 1978) by In vivo test showed that P. falciparum was sensitive to chloroquine, but in 1983 (Edris- sian et al. 1985) In vivo and In vitro tests show chloroquine resistant with rate of 5.1% which increased to 51.1% by 1996 (Edris- sian et al. 1999). This rate in Bandar Abbas was 32.5% in 1986, 64.8% in 1994–1996 and 68% to 84% by 1997 (Edrissian 2006). Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 36 Table 1. Health facilities in Bandar Abbas, 2004–2008, Bandar Abbas County Health facilities 2004 2005 2006 2007 2008 Teaching hospitals 2 4 4 4 4 Total district hospitals 11 10 10 10 11 Private hospitals 7 6 6 6 7 Governmental hospitals 4 4 4 4 4 Urban health centers, polyclinics 54 58 66 73 66 Rural health centers 21 21 17 23 19 Health houses 128 131 106 106 107 Laboratories 33 33 36 37 39 Pharmacies 36 32 42 45 46 Table 2. Malaria information in Bandar Abbas County, Hormozgan Province, 2004–2008, Bandar Abbas County Nationality Sex Age groups Species Residence place Y ears A t risk population Iranian N on-Iranian M ale F em ale <5 5-14 14< P. vivax P . falciparum M ix P. ovale T otal slides T otal cases A P I SP R A B E R R e-checked slides P ositive from re-checked City Village 2004 453658 160 147 243 64 7 60 240 309 1 0 0 41174 307 0.68 0.75 9.07 21414 28 147 160 2005 471816 556 64 362 258 28 166 426 609 11 0 0 34462 620 1.31 1.79 7.30 15465 26 164 456 2006 479040 355 30 213 172 35 118 232 378 7 0 0 27819 385 0.8 1.38 5.80 9203 17 110 275 2007 514450 95 24 81 38 4 20 95 116 3 0 0 17247 119 0.23 0.68 3.35 15078 32 53 66 2008 521657 38 50 81 7 3 4 81 75 11 1 1 19918 88 0.17 0.44 3.81 13260 11 68 20 Total -- 1204 315 980 539 77 368 1074 1484 33 1 1 140620 1519 -- 1.08 -- 74420 114 542 977 API = Annual parasite incidence, SPR = Slide positive rate, ABER = Annual blood examination rate Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 37 Table 3. Stratification of malaria in Bandar Abbas, Hormozgan Province, Iran 2004–2008, Bandar Abbas County Variables Stratum I Stratum II Geography Mountainous Coastal Vector An. stephensi An. dthali, An. fluviatilis Mostly An. stephensi Water source Pools, rivers, and containers Water pipe, rivers, swage Population movement No Present People behavior during transmission season Sleeping out side Sleeping in side API 1%< <0.5% Fig. 1. Malaria registration centers of Bandar Abbas, Hormozgan Province, Iran, Bandar Abbas County Fig. 2. Malaria cases in different months of year during 2004–2008, Bandar Abbas, Hormozgan Province, Iran Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 38 Fig. 3. Malaria stratification in Bandar Abbas, Hormozgan Province , Iran 2004–2008, Bandar Abbas County Discussion There was no considerable change in the number of health facilities during the study period (Table 1). The reduction of health houses that are the first step of the referral system is due to newly geographical changes that pass them to neighbor cities. There was a dramatic increase in malaria cases of 2005 compared to 2004. As showed in Table 2, during 2005–2006 the cases in rural area were more than two times higher than urban areas. There is a limited population movement in the rural area, so this epidemic occurred due to local transmission and this is attrib- uted to the weakness of surveillance system in that years. As it can be seen in Table 2, the total slides taken decrease year by year. Also the amount of insecticides used during epidemic was very limited, e.g. only 400 kg of pyrethroid insecticides and 510 kg Bacil- lus thuringiensis as larvicide were applied during the epidemic of 2005 (Management and Programming Organization 2005), and the control program started after the first peak of the disease. We found that the entomological data in the area are poor and not enough and reliable for designing a control program. This careless may be due to case reduction in pre- vious years as well as poor entomological data. After this epidemic, different control ac- tivities such as LLINTs, IRS and larviciding were strengthened parallel to case detection and treatment resulted to drop positive cases in the area, so that in 2008 the local trans- mission that usually occurs in rural area was about one third of reported cases in urban area. Reports of health services showed most of cases in Bandar Abbas City in this year were imported. Major determinates of malaria stratifica- tion in Bandar Abbas were: geography, vec- tor, water sources, population movement, peo- ple behavior and API. Stratification is done based on the above determinates which are illustrated in table 3 and fig 3. So Bandar Abbas were divided into two strata. From the situation analysis of Bandar Abbas we found the main problems of this township are: inaccuracy of data and malaria vector control activities. For elimination of ma- laria in Bandar Abbas it is suggested to do the following activities: Proper case manage- ment by early detection and prompt treatment, routine evaluation of drug resistance, biweekly Iranian J Arthropod-Borne Dis, 2010, 4(1): 31–41 AA Hanafi-Bojd et al.: Malaria Situation Analysis… 39 entomological survey during the transmission season in the high risk area, annual survey on susceptibility status of vectors to insecti- cides/larvicides, free distribution of the LLITNs to at risk groups including travelers and refu- gees, improving of housing condition at the rural areas, conducting training for entomo- logical survey as larvicidal personnel, spray- ing workers and response team for epidem- ics, treatment of breeding site by effective larvicides and biological measures, participa- tion of school children and community in en- vironmental management by drainage and fi- lling the major mosquito sources and small water resources, site selection (establishment of population away from reach of mosquitoes) and introduce of animal shelter between breed- ing site and human houses for exophilic mos- quitoes, personal protection using insect re- pellents, early detection of epidemics and im- provement of data collection, training of staff on computerization, data collection and excel management for updating malaria database, study the health aspect of any project by health authorities and anti malaria services and seek assistant to investigate advantages and benefits, evaluation of knowledge, attitude and practice of people in high risk area by KAP study, and training though mass media (TV, radio) and leadership (community leaders, schools, religious leaders). Acknowledgements This study is result of teamwork and field exercise study on malaria situation analy- sis and stratification, in the 12th International Diploma Course on Malaria Planning and Man- agement, conducted during November 2009- January 2010 in WHO Regional Malaria Train- ing Centre in Bandar Abbas, Southern Iran. We are thankful from the staff of this centre. We would like to thank Dr Masoodi, the di- rector and Ms M Mehranzadeh the focal ma- laria person in Bandar Abbas health center for their kind collaboration and data provid- ing. The authors declare that they have no con- flicts of interest. References Abai MR, Mehravaran A, Vatandoost H, Oshaghi MA, Javadian E, Mashayekhi M, Mosleminia A, Piyazak N, Edallat H, Mohtarami F, Jabbari H, Rafi F (2008) Comparative performance of ima- gicides on Anopheles stephensi, main ma- laria vector in a malarious area, southern Iran. J Vector Borne Dis. 45(4): 307–312. 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