Review Article a Review on Scorpionism in Iran Introduction
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J Arthropod-Borne Dis, December 2018, 12(4): 325–333 R Dehghani et al.: A Review on … Review Article A Review on Scorpionism in Iran *Rouhullah Dehghani 1, Esmail Charkhloo 2, Nedasadat Seyyedi-Bidgoli 1, Elahe Chimehi 1, Maedeh Ghavami-Ghameshlo 1 1Social Determinants Research Center of Health and Engineering Department of Environmental Health, Medical Science University of Kashan, Kashan, Iran 2Department of Environment Health Engineering, Faculty of Health, Jiroft University of Medical Sciences, Jiroft, Iran (Received 17 Dec 2017; accepted 15 Oct 2018) Abstract Background: Scorpions are one of the most important venomous animals in Iran. Their sting has more prevalence in the south and southwest areas. The aim of this study was to introduce their sting agent species in the country. Methods: Data were extracted by a mini review on scorpion stinging articles in Iran until early 2018 and then the sting agent species in each area were studied. Geographical and provincial distribution of each species also was provided. Results: Twelve scorpion species are causative agents of sting. According to their deadly rate and clinical symptoms, some of them are considered the most dangerous venomous animals in Iran. Some death cases have been reported be- cause of the sting of 3 species of Hemiscorpius lepturus, H. acanthocercus and Androctonus crassicauda. Remaining species have not deadly sting but because of their frequency, they encounter the individuals and cause the stinging. Conclusion: The highest number of sting agents is in Khuzestan, however Gilan and Mazandaran have the lowest fre- quency. Because of the high prevalence of sting agent species in that province, the necessity of providing control and prevention programs is very important. Keywords: Province, Sting agent, Scorpion, Iran Introduction Scorpion stinging has been reported in most probable encounter with humans has increased. of the warm areas of the world. These animals Therefore, in these cases, sting threat is more belong to the Arthropoda. Scorpion’s geographic in comparison with active species which are distribution is all over the world and the latitude out of and farther from the human residential between equator North 50 degree and south 52 places (8-11). degree (1) but even in this geographic area, they In Iran, the species which sting humans have different distribution. These animals have are more opportunist in terms of habitat se- been seen in many habitats and are able to live lection. They use ready spaces and gaps pro- in very tough conditions. They use the least en- vided in the buildings because of using tradi- ergy (2). They sting in order to defend and feed. tional building materials. This arthropod starts They are opportunist in terms of selecting their its activities at night and uses its venomous habitat and using any natural and artificial or sting to defend or hunt insects to feed. The hab- human-made spaces and gaps for hiding and itat of most of them is desert and non-residen- habitat (3, 4). Some of them are nest makers tial places (12-14). Since these animals are hunt- and diggers. They make nests in the soil with ers, like tarantulas, this kind of habitats attract smother soil pattern and proper physical struc- the animals which are these hunters’ food. On ture (5-7). Some species of these animals have the other hand, the scorpion hunters are attract- adapted their activity inside or around the hu- ed and make a complete food web with differ- man residential areas and for this reason their ent food chains. Therefore, this kind of plac- 325 * Corresponding author: Dr Rouhullah Dehghani, E- http://jad.tums.ac.ir mail: [email protected] Published Online: December 25, 2018 J Arthropod-Borne Dis, December 2018, 12(4): 325–333 R Dehghani et al.: A Review on … es, in addition to providing proper shelter and scorpion sting agents in the past decades till now habitat, make their food available (15-17). have been noticed. Overall, 150 sources were Scorpions are dangerous for humans be- found, but only 75 of these considering the pur- cause of having toxic and deadly sting and for pose of the study; i.e., report of the sting agent this reason they are medically important so that and concentration of study on Iran, 73 sources according to the available statistics, they have were surveyed. In addition to the survey of these the highest human casualties by venomous ar- studies, their application in Iran was done. Then thropod in the world (8, 18). Till now, 64 scor- the gained results were provided in tables, graph pion species have been reported in Iran (2) but and figure. no report is available if they all sting or not. The population frequency of scorpion species in Results Iran is more than other stinging and biting an- imals like venomous and non-venomous snakes; Up to now, three scorpion families have been therefore, their consequence is more stings (19, reported in Iran. The sting agent scorpions in Iran 20). In Iran, scorpion sting is about 10 times include two families of Buthidae and Hemiscor- more than snake biting. The highest human fa- piidae. They have 12 species from the 8 genus talities are caused by venomous arthropods in which 10 species belong to Buthidae family and the world (21-23). Scorpion sting which threat- 2 species belong to Hemiscorpiidae family. More ens many people to death annually is one of the than 83.5% of the identified sting agent species most important health issues in tropical and sub- in Iran belong to Buthidae family and 16.5% be- tropical areas like Iran. The highest statistics long to Hemiscorpiidae family (29, 2, 31, 32, 33). of stings and fatalities belong to Khuzestan Identification of sting agent species among the and Hormozgan (24-30). scorpions of Iran has been done by different re- Since many species live in Iran but sting of searchers especially in the field of medical sci- all of them has not been reported, the purpose ences. Still, there are changes in the number of of this study is introducing the sting agent spe- families, genus and species of sting agents in Iran cies and determining their province distribu- so that in the initial reports of researchers, sting tion during the past 50 years in Iran. agent scorpions in Iran were introduced to be 3 to 4 species while they are 12 species now (2, Materials and Methods 31). According to the last studies about scorpion sting agent species, there are 2 families in Iran: In this review article, keywords like scor- Buthidae and Hemiscorpiidae. pion, sting agents, dangerous species, provincial The species of Mesobuthus eupeus are in Ar- distribution, Iran, identification, studies, fami- dabil, Kerman, Isfahan, Markazi, Mazandaran, ly and species were used in the sites related to Sistan and Baluchistan, Yazd, Kohgiluyeh and valid medical and health journals, searching in Boyer-Ahmad, Semnan, Fars, Khuzestan, Hor- databases like Web of Science, Ovid, PubMed, mozgan, Golestan, Tehran, Kordistan, Kerman- Systematic Review, SID, Iran Medex, Scirus, shah, Ilam, west Azarbaijan, Khorasan Razavi Google Scholar and Medline to have access to and Khorasan Jonoobi. Then, Compsobuthus the articles during 1977 until early 2018. The matthiesseni in Bushehr, Chaharmahal and including criteria for entry in this study articles Bakhtiari, Fars, Hamadan, Kerman, Kohgiluyeh were as follows, the first all Iranian articles about and Boyer-Ahmad, Kordistan, Lorestan, Marka- animal bites were searched. In the next step, they zi, Qom, Khuzestan, Hormozgan, Khorasan, study focused on venomous animal bites and Kermanshah, Ilam, west Azarbaijan and Isfahan, stings. Then the sting agents among of the scor- Hottentotta saulcyi in Lorestan, Hamadan, Cha- pions were noticed, and then all articles of the harmahal and Bakhtiari, Khuzestan, west 326 http://jad.tums.ac.ir Published Online: December 25, 2018 J Arthropod-Borne Dis, December 2018, 12(4): 325–333 R Dehghani et al.: A Review on … Azarbaijan, Kermanshah, Hormozgan, Ilam, Sis- been measured among which M. eupeus is in the tan and Balochistan, Kordestan, Kohgiluyeh dead border and has been measured as 1.45mg and Boyer-Ahmad, Fars, Isfahan, Kerman and but LD50 of others is less (Table 2). LD50 of Ardabil, Odontobuthus doriae in Hormozgan, H. lepturus is much more than Buthidae family Kerman, Yazd, Isfahan, Markazi, Ghazvin, Teh- species but because of the delay mechanism of ran, Alborz, Semnan, west Azerbaijan, Kerman- the venom of this arthropod, it is considered as shah, Busher, Hamedan, Hormozgan, Hemiscor- one of the most deadly species in Iran (8, 18, pius lepturus in Khuzestan, Semnan, Fars, Kor- 33, 54, 55). The highest geographical distribution destan, Hormozgan, Bushehr, Ilam, Lorestan, of sting agent scorpions is related to M. eu- Kermanshah, Isfahan, Hamedan, Kohgiluyeh peus and C. matthiesseni reported in 20 and 18 and Boyer-Ahmad and Kerman, Orthochirus provinces, respectively. In this study, the min- scrobiculosus in Khuzestan, Hormozgan, Teh- imum geographical distribution belongs to H. ran, Sistan and Balochestan, Qom, Isfahan, me- acanthocercus reported from Hormozgan and dian (Razavi) Khorasan, Khorasan Jonobi, Gi- A. pterygocercus reported from Khuzestan (8, lan, Semnan, Kermanshah, Ilam, Androctonus 18, 21). Apistobuthus pterygocercus is de- crassicauda in Bushehr, Semnan, Khuzestan, scribed as A. susanae based on new samples Ilam, west Azarbaijan, Kordestan, Khorasan Ra- in Khuzestan Province. However, in the re- zavi, south Khorasan, Kermanshah, Kerman and ports, the name is A. pterygocercus as a sting- Sistan and Balochistan, Mesobuthus or Olivierus ing agent in Khuzestan (8, 18, 56) (Fig. 2). caucasicus in west Azarbaijan, Sistan and Balochestan, Isfahan, south Khorasan, Tehran, Discussion Markazi and Semnan, Hottentotta jayakari in Qom, Hormozgan and Fars, Hottentotta schach The number of scorpion species has been in Fars and Khuzestan, Hemiscorpius acantho- rapidly increasing in the last 3 decades in the cercus in Hormozgan and Apistobuthus ptery- world (57-61).