ISSN 1003-8280 CN 10-1522/R 中国疾病预防控制中心 主办
Objective To explore the genetic feature of Chinese Francisella tularensis using MLVA (multiple-locus variable number tandem repeat analysis). Methods Based on previous studies, 12 VNTR (variable number of tandem repeats) were selected that have higher resolving power on type B, and MLVA typing was conducted on 10 strains of Chinese F. tularensis and 29 reference strains that have been sequenced and published. Results The MLVA analysis indicated that Chinese F. tularensis has the unique copy numbers at the four VNTR: the copy number of repeat motif is 5 at the Ft-M3, and that is 1 at the Ft-M18, 2 at the Ft-M20, and 2 at the Ft-M21. Combined 12 VNTR analysis showed that the copy numbers of repeat motif were similar among some F. tularensis strains as follow:410108 and Japanese FSC022; 410112, 410113 and German F92; 410116, 410117 and American OSU18, Russian LVS. Conclusion By examining the 4 VNTR i.e. Ft-M3, Ft-M18, Ft-M20 and Ft-M21, a given isolate can be determined whether it is indigenous to China according to the unique copy numbers of repeat motif. In addition, the Chinese F. tularensis has higher genetic diversity comparing with F. tularensis from Europe, USA and Japan.
Objective To investigate the infection state and genotype of Wolbachia from Aedes albopictus in central and eastern Zhejiang province, and to provide a reference for mosquito and mosquito-borne disease control. Methods Light traps and human baits were applied to collect adult female mosquitoes, wsp genes of Wolbachia were tested by PCR and sequenced for phylogenetic analysis. Results In total 192 adult female mosquitoes were captured in six sampling sites: Hangzhou, Ningbo, Shengsi, Yiwu, Lishui and Wenzhou. The positive rate of wsp gene of Wolbachia was between 25.0% and 96.9% among these cities. There were 11 wsp haplotype sequences, of which lengths were between 581 bp and 605 bp, the average content of A, T, G and C was 31.4%, 31.1%, 21.5%, 16.0%, respectively. The homology of the nucleotide sequences of wsp was between 76.5% and 99.8%, and the homology of the amino acid sequences of wsp was between 66.2% and 100%. The 11 wsp haplotype sequences were divided in supergroup A (Wolbachia: wAlbA) and B (Wolbachia: wAlbB) by phylogenetic analysis. Conclusion Infection of Wolbachia in Ae. albopictus mosquitoes are widespread by in central and eastern Zhejiang province, whose genotypes belong to wAlbA and wAlbB.
Objective To explore gene sequence characteristics of rNDA-ITS2 in different populations of Culex pipiens pallens from Shandong province and analyze the genetic variation of these mosquitoes. Methods Adult-female mosquitoes were collected from different cities: Jinan, Jining, Qingdao, Liaocheng, Linyi, Zibo from Shandong and a sample from Nanjing. The pyrethroid-resistant and dichlorvos-resistant strains were reared in the laboratory. Single mosquito genomic DNA was extracted from Cx. pipiens pallens of these different populations and rNDA-ITS2 of Cx. pipiens pallens were specifically amplified by PCR. The PCR products were cloned into the pMD-19T simple vectors and sequenced. Genetic polymorphisms of them were analyzed by biological information systems. Results The obtained rDNA-ITS2 sequences were approximate 460 bp in length, with 36 mutation sites. Culex pipiens pallens from different geographical environment showed gene polymorphisms in sequence analysis of rNDA-ITS2. There were transition,transversion and deletion in the mono nucleotide of rNDA-ITS2 gene. Conclusion Genetic polymorphisms presented on rNDA-ITS2 of Cx. pipiens pallens from different geographical regions in Shandong province and different resistance strains in the lab were probably associated with the ecological environment.
Objective To investigate the mosquito species and breeding environment in Zhangzhou of Fujian, and to provide basis for prevention and control of mosquitoes and mosquito-borne diseases. Methods A series of combined larvae investigation methods, human bait method and ox-trap method were used. The mosquitoes were collected mainly in the residential area, mountain area and the port of six counties. Then they were classified and identified after larvae developing into adult. Results The mosquitoes were identified to 40 species, 9 genus and 3 subfamilies. They were 4 species of Anopheles, 12 Aedes, 14 Culex and 10 other mosquito genera. Uranotaenia koli Peyton et Klein was first reported in Fujian. Different mosquito species were captured in different parts. The largest number of mosquito species were in Nanjing and Pinghe, there were both 27 species. Eight types of mosquito breeding habitats were investigated. There were 15 species breeding in bamboo tube, 11 species from the pits formed by ravine streams water, 11 species in stone caves, and few from other breeding habitats. Conclusion There are many kinds of mosquitoes related to mosquito-borne diseases in Zhangzhou. The monitoring of mosquitoes for Dengue should be strengthened, and comprehensive management measures should be combined with breeding environment.
Objective To study the community structure, dynamic and West Nile virus (WNV) carried of mosquito vectors in Guangdong, and provide scientific evidence for further development of control and prevention strategies. Methods Mosquito density was monitored by Light-trap from May 2013 to April 2014. One-step reverse-transcript PCR was applied. Results The average density of mosquito was 11.80/light. The seasonal peak of density was from May to July. Of all habitats the density in the barn was the highest. Culex pipiens quinquefasciatus accounts for 89.90%, the largest proportion of mosquitoes. No positive was found by RT-PCR. Conclusion Culex pipiens quinquefasciatus was the predominant species, the monitoring data could provide scientific basis for the control strategies and warning and forecasting of WNV, but the vectors species of West Nile fever in Guangdong province and its spread risk needs to be further studied.
Objective To study the blood-feeding and oviposition habits of Aedes albopictus, and discuss the risk of dengue fever transmission in Shenzhen. Methods Aedes albopictus were raised in laboratory by feeding blood regularly, the time and frequency of blood-feeding and oviposition were recorded, as well as the egg production and other indicators. Results The median of blood feeding times was 9 in the lifetime of Ae. albopictus, while the maximum was 16, the median oviposition times was 4 in the lifetime, while the maximum was 7, the average of egg production is 204, while the maximum was 372. The median of blood feedings was 2 in one parity,while the maximum was 10,The median of egg production was 56 in one parity(range: 13-142). The median days from first blood feeding to oviposition was 4 in one parity(range: 2-17). Conclusion The habits of blood feeding and oviposition repeatedly was widespread among the Ae. albopictus populations in Shenzhen,this habits could be important significance for the spread of dengue fever.
Objective This experiment used Coptotermes formosanus Shiraki as selected insect to find suitable preservatives and its optimum concentration in termite artificial bait. Methods The experiment compared the mildew- proof effect of four preservatives, Sodium benzoate, Potassium sorbate, Citral and Propylparaben on termite artificial bait outdoor, and took choice-feeding and no-choice-feeding experiments to compare the effect of Sodium benzoate, Potassium sorbate, and Propylparaben on the termite feeding if added into the bait. Results The addition of Citral did not efficiently affect the mildew of the bait, while other three preservatives inhibited the mildew efficiently; the heavy feeding by termites on baits that contained 0.05% Sodium benzoate, 0.1% Potassium sorbate and 0.025% Propylparaben were 0.45, 0.28, 0.34 g, and all had no effect on the termite survival rate. Conclusion The 0.05% sodium benzoate is the most suitable preservative for termite artificial bait.
Objective To observe the efficacy of 2% deltamethrin insect-resistant mat against cockroach in the lab and field. Methods Carrying on with the method of GB/T 13917.1-2009 to observe the efficacy of 2% deltamethrin insect- resistant mat against cockroach in the laboratory and conducting an experiment against cockroach in a major hospital ward in Nanjing. Results The laboratory test showed that KT50 of insect-resistant mat was 13.4 min against Periplaneta americana and 9.6 min against Blattella germanica. The mortality was 100% after 72 h. No large numbers of dead cockroach appeared after 1 d, 3 d and 7 d. After 30 d, the declining rate of density was 43.1%, 68.5% after 60 d. Conclusion The 2% deltamethrin insect-resistant mat has better effects on killing cockroach in the laboratory. Short term efficacy against cockroach was not obvious, but it can be used with the quick killing insects against cockroach in hospital.
Objective In order to understand in vitro development rules of Gasterophilus pecorum and lay the foundation for further study of this myiasis. Methods Collected the mature larvae of G. pecorum from Przewalaski's Horse in April 2014, cultured pupae under the natural varying temperature. Record the average temperature of development and developmental duration, the developmental threshold temperature and effective accumulated temperature for pupae of G. pecorum were determined by using rule of effective temperature summation“least square method”. Results (1) The developmental threshold temperature had a range of (10.58± 0.64)℃ and the effective accumulated temperature had a range of (190.95 ± 24.85) d·℃; (2) Unary linear regression equation was established between the developmental temperature and developmental rate: (V=-0.0541 + 0.0052T). The linear regression analysis showed a significant relationship between the developmental temperature and developmental rate (r2=0.923, P=0.001); (3) The development duration prediction for pupae of G. pecorum was established: N=(190.95± 24.85)/[T-(10.58± 0.64)]. Conclusion Through the investigation of local temperature, the development duration prediction for pupae of G. pecorum was applied to predict the adult emergence period of G. pecorum. Combined with the larvae investigation of G. pecorum can provides effective scientific basis for predict adult occurrence dynamics of G. pecorum.
Objective To investigate the seasonal variation and geographical distribution of different fly species in downtown Shanghai. Methods Conducted fly surveillance during March to November of 2013 in 2 parks and 1 residential area in Huangpu district, and then did identification and classification. Results The fly density in park environment was significantly higher than residential environment (Z=-2.870, P=0.002). Although shared the same dominant family of Calliphoridae, the flies species compositions were different between the 2 kinds of environments, Chrysomya megacephala was the predominant fly species in parks (composition ratio is 23.43%) and Lucilia sericata was the predominant one in residential (composition ratio is 20.11%). Different fly species showed different seasonal peaks and distribution trends, C. megacephala and Lucilia (s. str.) illustris had the unimodal trend,while L. sericata, Aldrichina grahami and Fannia prisca showed the bimodal trend. Conclusion The study suggests the work of fly prevention and control in downtown Shanghai should focus on the predominant Calliphoridae, such as genera of Lucilia and Chrysomya.
Objective To learn and master the mosquitoes and the flies density and seasonal fluctuation in Shenyang and to provide a technical support for arbo-infectious diseases prevention and control. Methods Light traps and fly cage were used for mosquitoes and flies respectively. Results From 2011 to 2014, a total of 8572 mosquitoes were collected, with a mean density of 4.46 mosquitoes/(lamp·hour). Culex pipiens pallens was predominant species, accounting for 73.74%. The mosquito density was the highest in barns, followed by in farmers'houses, residential areas, hospitals and in parks. The mosquito density showed a marked seasonal fluctuation in Shenyang, with peak activity between July to September; from 2011 to 2014, a total of 16 119 flies were collected, with a mean density of 6.40 flies/(trap·hour), falling into 5 families, 13 genera and 14 species. Lucila sericata was predominant species, followed by Muscina stabulans, Musca domestica, Bellieria melanura, Calliphora vicina, Bercaea haemorrhoidalis, Boettcherisca peregrina; with a rising trend year by year, fly density of 2014 was 6.4 times that of 2011; fly density had peak times from June to August; the fly density was the highest in green belts, followed by in farm product markets, residential areas and in restaurants. Conclusion Data were obtained for the basic information on mosquitoes and flies density, species composition and seasonal fluctuation in Shenyang. The long term and systematic monitoring on mosquitoes and flies density should be conducted to provide a scientific basis for reasonable formulation of comprehensive prevention and control strategy.
Objective To investigate the breeding of the mite Tarsonemus granarius in the stored Chinese herb safflower. Methods Samples of Carthamus tinctorius were collected from Wuhu, Huainan and Xuancheng in China. The mites T. granarius were isolated with directicopy and waternacopy, and identified and counted under the light microscope. Results The mites T. granarius were found in the stored Chinese herb safflower. The breeding rate and breeding density was 6.50% (13/200) and 6.12 heads/g (796 heads/130 g), respectively. The composition of adult mites accounted for 85.80%, young mites 12.82% and eggs 1.38%. Conclusion Our findings suggest that the mite T. granarius breed in the stored Chinese herb safflower, and this condition requires our attention to prevent and control.
Objective To study the infection status of Rickettsia typhi in rodents on Heixiazi Island at the Sino-Russian Border. Methods Rodents were captured by night trap on the Heixiazi Island between 2013 and 2014, liver tissues were processed by aseptic operation and the genomic DNA were extracted from them. Rickettsia typhi strains were confirmed by nest polymerase chain reaction (nest-PCR) of the 136 bp gltA gene. The positive amplification products were sequenced and compared with other R. typhi strains in GenBank, then phylogenetic analyses were drafted by software Mega 5.0. Results A total of 644 rodents were captured, which belong to 3 orders 5 family 8 genera. Apodemus agrarius which was the predominant species, accounting for 42.70% (275/644), followed by Clethrionomys rutilus (178/644, 27.64%) and Microtus fortis (136/644, 21.12%). The infection rate of R. typhi was 4.81%, with 31 rodent samples detected positive, which belong to 5 species. The infection rate of M. fortis (13/136, 9.56%) was relatively high, but no significant difference was found between the infection rate and the species of rodents by Fisher's exact probability (P=0.156). Although the infection rate of females (10/168, 5.95%) was higher than males (21/476, 4.41%), no significant difference of sex on the infection of R. typhi (χ2=0.643, P=0.423). There was no significant difference of weight on the infection of R. typhi (F=1.633, P= 0.202). However, there was significant difference of captured time on the infection of R. typhi (χ2=191.419, P=0.000). All the R. typhi in rodents on this region were in the same phylogenetic branch with a high similarity of above 99.98%,close with the USA strain CP003398 by the similarity above 95.83%. Conclusion The investigation proved that R. typhi is probably prevalent in rodents on Heixiazi Island at the Sino-Russian Border. The infection rate in rodents was significant difference in captured time. This study provides the basis for scientific development of Heixiazi Island in the future.
Objective To investigate the species composition, diversity and prevalence of the infection of Gasterophilus botfly larvae in horses from Duolun county, Inner Mongolia Autonomous Region. Methods Adult horses were treatedorally using ivermectin, the botfly larvae were collected from the feces and identified. Results Six species in the genus Gasterophilus were collected from each individual horse and with the following prevalence: G. intestinalis 53.04%, G. nasalis 24.00%, G. haemorrhoidalis 10.61%, G. pecorum 6.96%, G. nigricornis 3.13%, G. inermis 2.26%. Conclusion The species of Gasterophilus in Duolun county are abundant, and the horse gastric myiasis is prevalent in this area.
Objective To master the current situation of infrastructure and service ability of rabies post-exposure prophylaxis (PEP) clinics in Qingdao. Methods All PEP clinics in municipal health institutions were investigated and over four-fifths in district or county-level institutions and more than one fourth in township health centers were randomly sampled. The contents included human resources, area settings, main necessary materials and facilities and service ability. Excel 2007 was used for data entry and Epi Info 6.04 for Chi-square test. Results There were 2 to 39 staff in each PEP clinic with the average of 12.54 of all, and part-timers accounted for 83.73%. The number ratio of doctors to nurses was 1:1.13. Surgeons and general practitioners totally constituted 90.85% of all doctors, nurses having licenses accounted for 93.07%. Of all clinics, 64.00% were within one department or single area, 100% had sterilizing alcohol and iodine tincture, 98.00% had emergency rescue medicine, 90.00% used a cold chain, 74.00% had a weight scale, 84.00% were open for 24 hours a day. All were able to treat the topical wounds and vaccinate, and 50.00% of which administered rabies immunoglobulin. The clinics in municipal health institutions were better than the other ones. Conclusion There were significant differences in infrastructure and service ability among rabies PEP clinics in different-level health institutions in Qingdao. The construction of some clinics in district, county-level and township health institutions should be strengthened.
Objective To study the genotypes of the Hantavirus carried by the rodents in Changchun city. Methods Rat lung samples were collected in Changchun areas, and Hantavirus antigens in rat lungs were detected by immunofluorescence assay. The S gene fragment in HV-positive samples were amplified by RT-PCR and sequenced. The gene sequences were analyzed by using DNAman software and Mega 6.0 software. Results In this study, 100 Rattus norvegicus were captured in Changchun areas, of which 3 (3.0%) samples were positive for HV antigen. The S gene fragment of 3 strains were amplified from 3 positive samples. Homology analysis indicated that the nucleotide homology from the three S segment sequences was 100%, while that to other SEOV nucleotide homology was 95.4%-100%. All the 3 strains were SEOV. Phylogenesis analysis showed that the 3 strains were in the same group on the phylogenetic tree, which belonged to S3 sub-genotype. Conclusion The study shows that the Hantavirus carried by R. norvegicus in Changchun city was SEOV, the sub-genotype SEOV-3.
Objective To provide the basis for development of the prevention and control strategies by analysis of Japanese encephalitis (JE) epidemiological characteristics, dynamic change trend and comprehensive monitoring results in Hunan province. Methods Using descriptive epidemiological method, analysis the epidemiological characteristics of JE of Hunan province from 1951 to 2013; Analysis of the monitoring data of mosquito vectors and host animal in JE surveillance point by using SPSS 13 statistical software; ELISA assay was conducted for detection of serum JE IgG antibody in the host animals. Results From 1951 to 2013 in Hunan province, the epidemic of JE experienced rising, epidemic, stable, declining and low level periods, the incidence rate maintained at a low level; The onset time mainly concentrated in June to August. The incidence concentrated in the young age group, 0 to 14 year old age group accounted for 98.11% of cases. The cases mainly distributed in the western and southern of Hunan province. In the monitoring of cases, ones with no / unknown history of immunity accounted for 66.89%. Culex tritaeniorhynchus was the predominant species, its density and reservoir host (pig) infection and epidemic of JE were positively related. The antibody conversion rate reached 50.00% in pigs one month earlier before the onset peak in humans. Conclusion The JE epidemic in Hunan province may be controlled by improving JE vaccination coverage, strengthening the monitoring of vectors and host animals, and eliminate mosquitoes breeding habitats.
To classify the Fannia in Mountain Emei in China, the principle and method of entomological classification were used in this study. Through identification, this species was confirmed as Fannia fuscinate Chillcott, 1961. And this species was confirmed as a new record in China which has not been reported so far. The newly discovered species geographic distribution area for the group Fauna and evolution of species provide important scientific information.
The flea collections from Hainan Tibetan Autonomous Prefecture were identified and their geographical distribution was mapped. In total, 88 species (subspecies), belonging to 6 families and 29 genera were recorded, among which 44, 45, 50, 18 and 19 species (subspecies) were collected from the counties of Gonghe, Xinghai, Guinan, Guide and Tongde, respectively. The findings from the current paper are helpful to understand the flea fauna and management of flea- borne diseases in Hainan prefecture, Qinghai province.
Objective To provide the basis for plague prevention and control by investigating species composition and infection rate of Yersinia pestis in fleas collected from floor in the plague natural foci of Lijiang in Yunnan province. Methods Investigation was carried out at 8 villages of Yulong county and 5 villages of Gucheng district of Lijiang. Floor fleas were collected by sticky flea paper method. Species was identified based on morphological characteristics. Y. pestis was cultured from fleas in laboratory. Results The sticky flea paper 21 845 copies were collected in the 13 villages. The average flea index of 0.0249. The sex ratio of fleas was 1.95:1. In total, 545 fleas were collected, which belong to 2 families, 3 genera and 3 species, including Ctenocephalides felis felis (69.54% ), Pulex irritants (18.72% ), and Ctenophthalmus quadrarus (11.74%). Infection of Y. pestis was negative for all fleas. Conclusion There are 3 flea species from floor in the plague focus, Ct. felis felis, P. irritant were predominating species. Infection of Y. pestis was not found.
Objective Isolated Brucella from human during 1958 to 2013 in Qinghai was analyzed. Methods Since 1958, the clinical diagnosis of brucellosis patients in bacteria from 43 strains of Brucella isolated culture were source and analyzed with clinical relationship, using the hydrogen sulfide produced determination, thionine and basic fuchsin dye bacteriostasis test, single serum agglutination reaction, phage splitting test on 43 strains of Brucella strains were phenotype subtype identification. Results From 337 for Brucella culture, isolated 43 strains of Brucella. The 15 patients with localized lesions were detected in chronic brucellosis. The 43 strains were 3 strains of Brucella melitensis, sheep, sheep 1 type 14 strains of type 2, 26 type 3 strains of sheep. Conclusion Sheep bacteria are pathogenic bacteria of brucellosis in Qinghai population.
Objective Master the mosquito species composition, density and seasonal fluctuation before the second Beijing Capital Airport construction, to provide a scientific reference for the control of mosquito-borne infectious diseases. Methods Based on Daxing covers location of airport construction plan, selecting six natural villages for monitoring from east to south-west. Opening the lure mosquito lamp at one hour before sunset, continuous monitor mosquito for 2 hours using the lure mosquito lamp of carbon dioxide, once every ten-day in June to October 2014. Identifying species and counting the captured mosquitoes. Results In total 5883 mosquitoes were captured, belonging to two subfamilies, four genera, five species. Armigeres subalbatus was collected in Daxing area for the first time. Culex pipiens pallens was the perdominant species. The mosquitoes density peak was in late June. Testing negative results of Japanese encephalitis virus nucleic acid. Conclusion Mastering the mosquito species composition, density and seasonal fluctuation before the second Beijing Capital Airport construction. The monitoring results can provide a scientific basis for the assessment of risk correlation mosquito-borne infectious diseases, and for the prevention and control of mosquitoes.
Objective To understand the potential of malaria by monitoring vectorial capacity of Anopheles sinensis, providing basis for early warning and prevention and control of malaria. Methods An investigation method for capacity of local vector transmission was used for quantitative calculation of An. sinences biting rate, human blood index, man-biting habit and expected life of infectivity, etc, and then the vector capacity and basic reproduction rate of An. sinensis was obtained according to the formula of Garrett-Jones (1964). Results The anopheles population declined year by year,the maximum density of An. sinensis was July, the host of An. sinensis was ubiquitous, the human blood index was 0.097 which was overall high, the peak season of basic reproduction rate was July, all higher than the critical value of 1.0. Conclusion There was a certain trend of malaria transmission, prevention and control task was still demanding, we need to increase mosquito control work of overwintering mosquitoes and the first generation mosquitoes of early spring.
Objective To understand the prevalence of residents insect bite dermatitis in Laizhou urban area in order to improve control measures. Methods The residents outdoors were selected and diagnosed with insect bite dermatitis or not by dermatologists in five sampling sites. Key information of gender, age, the number and distribution of rashes were collected and analyzed. Results The prevalence of insect bite dermatitis was 36.63%, and the residents over 41 years old had higher prevalence than underage ones (χ2=86.640, P< 0.01), and there was no difference between males and females (χ2=1.500, P=0.220). The cases with the number of rashes less than 10 accounted for 96.46%, and no significant difference of skin lesions in gender and age. The cases with rashes only distributed in the lower extremities accounted for 79.02%, and women's upper arms had more probability to be bitten compared with men's, while the elder people had less probability in contrast to younger ones. Conclusion The prevalence of insect bite dermatitis in Laizhou urban area is high, and the control measures and health education work should be strengthened.
Objective To provide scientific data for vector control after investigating its community structure and seasonal fluctuation in Ningbo, 2014. Methods Mouse trap, light trap, cage trap and glue trap were used to catch rodents, mosquitoes, flies and cockroaches respectively. Results The rodents were identified as 4 species of 3 genera, 1 family and Rattus norvegicus was predominant species and occupied 62.17%. The mosquitoes were identified as 4 species, 3 genera, 1 family and the dominant species, Culex pipiens pallens, occupied 61.54%. The flies belonged to 13 species of 7 genera, 3 families. Musca domestica was predominant species and occupied 24.10%. The cockroach were identified as 3 species of 2 genera, 1 family and Blattella germanica was predominant species and occupied 80.90%. Rodents and cockroaches were active throughout the year and active period was from April to October. Seasonality of mosquitoes and flies was obvious. The active peak of mosquitoes and flies were both on July. Conclusion The community structure and seasonal fluctuation of vector were preliminarily known. It should strengthen monitoring and control of vectors and vector borne diseases in Ningbo.
The rodent-borne diseases including plague, hemorrhagic fever with the renal syndrome and leptospirosis are great concern of public health. The current situation of rodent-borne disease prevention warrants enhanced investigation. The epidemic regions are expanding, vectors are widely distributed, and unknown and subtype pathogens need to be revealed. This article reviews the epidemiological status, vector ecology and etiology of rodent-borne diseases, and provides evidence for the prevention and control of rodent borne diseases. It is important to strengthen the comprehensive surveillance and risk assessment of rodent borne diseases for prevention and control.
Coastal development involves the development of ports, industry and urban interaction. In the coastal development process, the impact of disease vectors on human health was especially concerned. The vectors of public health importance including insects and rodents could spread directly or indirectly some infectious diseases. There were many kinds of medical vectors in the coastal areas. The rodents and their ectoparasitic mites, ticks could spread hemorrhagic fever with the renal syndrome (HFRS), scrub typhus, Lyme disease, human granulocytic anaplasmosis (HGA), severe fever with thrombocytopenia syndrome (SFTS). The mosquitoes could spread Japanese encephalitis, dengue fever, malaria, chikungunya fever. The fly and cockroach mechanical spread intestinal infections, etc. In order to ensure and promote the economic development of the coastal regions and social stability,it should continue to carry out research on the impact of disease vectors prevailing in coastal areas on public health.
