ISSN 1003-8280 CN 10-1522/R 中国疾病预防控制中心 主办
Objective To investigate the species and distribution of fleas in the frontier ports of China. Methods The fleas were collected from the rodents captured by snap-trap and live-trap, during the period from 2001 to 2015. Results The fleas were identified as 113 species or subspecies, belonging to 6 families, and 28 genera. Due to the complex habitats, the northern port areas have large variety of host rodents and the fleas. The fleas in the Xinjiang port areas possess the most diversity, reaching 57 species and subspecies, among which, 29 species occurring in Alashankou port. Closely followed were Inner Mongolia port areas, including 24 species in Erlianhaote port, then Heilongjiang port areas, including 19 species in Suifenhe port area. For the habitats of the southern port areas are monotonous, and the common host animals were commensal rodents,the species of fleas were less. Only 1-2 species were captured at most of those ports. Conclusion The species and distribution of fleas in the important frontier ports of China were studied, which provided the basic data for the prediction, risk analysis and prevention and control of flea borne diseases at frontier ports in the whole country.
Objective To fully clarify the species of the rodents at the port region of Sino-Vietnam in Guangxi Zhuang Autonomous Region, so as to provide basic data for the management of rodents. Methods Night trapping method and night cage method were used to collect the rodents. Results Collected were 498 rodents including 4 species at Dongxing port, 756 rodents including 14 species at Pingxiang port, 75 rodents including 6 species at Shuikou port and 173 rodents including 8 species at Longbang port. Among these rodents, Rattus norvegicus was the predominant species. Conclusion Rattus norvegicus was the key specie of the surveillance and control at the ports.
Objective To investigate the infection with Borrelia burgdorferi sensu lato and its genospecies in Pingxiang of Guangxi Zhuang Autonomous Region, China. Methods The specimens of ticks, rodents, and wild birds were collected in Pingxiang region of Guangxi Zhuang Autonomous Region in July 2011. Genomic DNA of B. burgdorferi sensu lato was extracted from the ticks and the spleens of rodents and wild birds by boiling method and Qiagen kit. The 5S-23S rRNA gene intergenic region of B. burgdorferi sensu lato was amplified by nested PCR; the PCR products were sequenced and aligned with the sequences of 5S-23S rRNA gene intergenic region of B. burgdorferi sensu lato deposited in GenBank to identify the genospecies of B. burgdorferi sensu lato. Results B. burgdorferi sensu lato was detected in three rodent specimens, with an infection rate of 5.66% (3/53) among the rodents. One of the sequences had a homology of 100% with B. valaisiana (accessions in GenBank: HM100125.1, AB091455.1, AB091454.1, AB091453.1). B. burgdorferi sensu lato was not found in ticks and birds. Conclusion The infection with B. valaisiana in rodents is present in Pingxiang region of Guangxi Zhuang Autonomous Region.
Objective To determine the killing effects of sulfuryl fluoride fumigation in ships with rodent infestation. Methods The rodent density was investigated using the Methods of observation and glue rat boards. Sulfuryl fluoride fumigating at 56 g/m3 was then administered in the obturated space of the infested ships for 10 h. Results A large number of rat feces were detected in kitchens, dining - rooms and food storehouses. Rat trace was evident, and 7 roof rats were observed on 10 glue rat boards, indicating heavy infestation. After treatment, 16 dead roof rats and 8 albino rats were found. Conclusion Rodent control in ship should be taken by fumigation of sulfuryl fluoride in emergency situation, such as heavy infestation and out break of specific diseases associated with commensal rodents.
Objective To compare the killing effects of smoke generator, aluminium phosphide and bromadiolone baits against rodents in the port of Erlianhaote, Inner Mongolia. Methods The rodent density was investigated by powder tracking and burrow-checking both indoor and outdoor, respectively. Integrated management such as 0.005% bromadiolone once-baiting, sanitation and rodent - proofing program were adopted in warehouses; and smoke generators, aluminium phosphide and bromadiolone baits were deployed in hungriness region of Meriones unguiculatus. Results The rodent density was 15.85% in warehouses and 19 to 23 holes/hm2 outdoor. After treatment, the killing rate was 89.53% in warehouses and 100% in the other 3 outdoor sample sites. Conclusion Indoor rodent control should be taken using integrated management approaches, and baits used in the outdoor regions. Smoke generator and aluminium phosphide had good killing effects. Under emergency situation, doubling the rodenticide dosage may achieve complete rodent control.
Objective To confirm whether one-time deployment of bromadiolone is effective in seaport rodent control. Methods Indoor and outdoor rodent density was investigated both indoor using powder tracking and night-trap Methods after saturated deployment of bromadiolone baits. Results The killing rates were 37.26% and 95.10%, in Mawei port, Fujian and in Dongjiang port, respectively. Conclusion One-time saturated deployment of a rodenticide in a sufficiently large area may yield satisfying killing effect.
Objective To compare the attracting effects of carbon dioxide (CO2) traps with ultraviolet (UV) light traps on mosquitoes in field settings. Methods Both approaches were used within a 2-hour window before and after sunset, three times monthly, for six consecutive months. Results A total of 2483 mosquitoes were captured, of which 1544 were attracted by CO2 traps and 939 by UV light. The density of mosquitoes captured by CO2 traps (11.20/lamp·hour) was significantly higher than by UV light traps (6.87/light·hour). Conclusion The attracting effect of carbon dioxide traps was better than that of UV light traps. CO2 traps can be used to effectively monitor mosquito density.
Objective To control rat density and ensure public health security at the capital airport. Methods In a routine rodent density investigation carried out by Beijing Capital Airport Entry-Exit Inspection and Quarantine Bureau from October 15 to 17, 2009, it was found that the average rodent density in some areas of the capital airport was up to 5.17%, which exceeded the standard limit of International Hygiene Airport. An emergency response was immediately launched according to the Frontier Public Health Emergency Response Program, including the establishment of an emergency response team, development of the rodent control plan, administration of rodenticides and deployment of glue traps to reduce the rat density. Results After 30 days of emergency treatment, the rodent density decreased to 0.50%, and the monitoring after 40 days revealed zero rat density (based on the night trap measurement). Conclusion The Frontier Public Health Emergency Response Program played a crucial role to proper handling of rodent density increase.
【Abstract】 Objective To study the rodent population composition and its seasonal fluctuation at Beijing Capital international airport (BCIA) from May. to Sep. of 2006-2008, and provide the evidence for the rodents control at BCIA during Olympic Games. Methods The special rodent investigation for Olympic Games was adopted, and the investigation data was analyzed. Results Rattus norvegicus and Mus musculus were the dominant species at BCIA, and R. norvegicus was mainly in the room, while M. musculus mainly in outdoor environment. The constituent ratio of Apodemus agrarius reduced year after year. The average rodent densities were 0.86%, 0.29% and 0.26% in 2006-2008, showing the downward tendency. Conclusion A special rodent investigation should be carried out at frontier port before the important international events, especially know the effect of important construction items on the rodent density and its population composition.
【Abstract】 Objective To master the species and seasonal fluctuation of mosquitoes, and provide scientific basis for mosquitoes control in Beijing ports. Methods CO2?baited trap and net trap methods were used for the surveillance of adult mosquitoes, and the scoop dipping method for the surveillance of larvae. Results A total of 14 270 mosquitoes were collected, belonging to 4 genera and 6 species. They were Anopheles sinensis, Culex pipiens pallens, Cx.tritaeniorhynchus, Aedes albopictus, Ae.vexans and Armigeres subalbatus. As many as 114 mosquito larvae were collected, which were Cx.pipiens pallens and Cx.modestus. The dominant specie was Cx.pipiens pallens and its active peak was September. Conclusion The integrated management should be taken for a long time to control mosquitoes in Beijing ports.
【Abstract】 Objective To study the influence of the Beijing Capital International Airport T3 terminal construction on circumjacent rodent composition and density, and provide the evidence for the rodents control. Methods The night trapping method was used to investigate the rodent composition and density in the representative environments around the T3 terminal construction sites monthly. Results There were 102 rats belonged to three species caught in T3 terminal construction sites. The dominant specie was Mus musculus, accounting for 67.65% of the total. Rattus norvegicus and Apodemus agrarius accounted for 21.57% and 10.78%, respectively. There was significant difference in the rodent composition from 2005 to 2008(χ2=17.24,P=0.008), and the average rodent density reduced year after year. Conclusion The construction of T3 terminal led to the change of environment, resulting in change of rodent composition and its density. It should strengthen the surveillance of rodent for the important construction item around its peripheral environment and carry out thoroughly the killing of rodent.
【Abstract】 Objective To master the fly species and population composition at Beijing port and provide scientific evidence for fly control. Methods The baited fly traps method was used in this study. Results There were 30 species, 16 genera, 5 families of flies captured from April to November of 2006 and 2007. The annual average fly density was 59.7 flies/(cage ·day). There were two peaks, one was in May and the other was in September. Conclusion It was important to clean out the breeding sites for the control of flies at Beijing port.
【Abstract】 Objective To master the species and composition of ectozoa on the body of the rodents and hedgepig in Beijing ports. Methods Mus musculus, Rattus norvegicus, Apodemus agrarius and Erinaceus europaeus were captured by night trapping method, and the ectoza were collected from the body of them. Results A total of 282 ectozoas were picked up and identified, belonging to 12 species. It included 61 gamasid mite belonging to 6 species, 203 ticks belonging to 4 species, 13 chigger mite belonging to 1 species and 5 fleas belonging to 1 species. Beside the above species, there were Laelaps echidninus, Ls.jettmari, Ls.nuttalli, Haemolaelaps glasgowi, Hirstionyssus sunci, Macrocheles muscaedomesticae, Dermacentor silvarum, Dermacentor nuttalli, Rhipicephalus sanguineus, Haemaphysalis longicornis, Leptotrombidium pallidium, Xenopsylla cheopis, respectively. Conclusion The infestation ratio and the ectozoa index of these hosts were lower with the exception of hedgepig.