The Alataw Pass, near the Ebinur Lake Wetland (northwest of China) and Taldykorgan (east of Kazakhstan), is a natural habitat for wild rodents. To date, little has been done on the surveillance of Bartonella spp. and Wolbachia spp. from fleas in the region. Here we molecularly detected Bartonella spp. and Wolbachia spp. in wild rodent fleas during January and October of 2016 along the Alataw Pass-Kazakhstan border. A total of 1,706 fleas belonging to 10 species were collected from 6 rodent species. Among the 10 flea species, 4 were found to be positive for Wolbachia, and 5 flea species were positive for Bartonella. Molecular analysis indicated that i) B. rochalimae was firstly identified in Xenopsylla gerbilli minax and X. conforms conforms, ii) B. grahamii was firstly identified in X. gerbilli minax, and iii) B. elizabethae was firstly detected in Coptopsylla lamellifer ardua, Paradoxopsyllus repandus, and Nosopsyllus laeviceps laeviceps. Additionally, 3 Wolbachia endosymbionts were firstly found in X. gerbilli minax, X. conforms conforms, P. repandus, and N. laeviceps laeviceps. BLASTn analysis indicated 3 Bartonella species showed genotypic variation. Phylogenetic analysis revealed 3 Wolbachia endosymbionts were clustered into the non-Siphonaptera Wolbachia group. These findings extend our knowledge of the geographical distribution and carriers of B. rochalimae, B. grahamii, B. elizabethae, and Wolbachia spp. In the future, there is a need for China-Kazakhstan cooperation to strengthen the surveillance of flea-borne pathogens in wildlife.
Bartonella ; Ecosystem ; Lakes ; Rodentia ; Siphonaptera ; Wetlands ; Wolbachia ; Xenopsylla

OBJECTIVES: Earthquakes are one the most common natural disasters that lead to increased mortality and morbidity from transmissible diseases, partially because the rodents displaced by an earthquake can lead to an increased rate of disease transmission. The aim of this study was to evaluate the prevalence of plague and tularemia in rodents in the earthquake zones in southeastern Iran. METHODS: In April 2013, a research team was dispatched to explore the possible presence of diseases in rodents displaced by a recent earthquake magnitude 7.7 around the cities of Khash and Saravan in Sistan and Baluchestan Province. Rodents were trapped near and in the earthquake zone, in a location where an outbreak of tularemia was reported in 2007. Rodent serums were tested for a serological survey using an enzyme-linked immunosorbent assay. RESULTS: In the 13 areas that were studied, nine rodents were caught over a total of 200 trap-days. Forty-eight fleas and 10 ticks were obtained from the rodents. The ticks were from the Hyalomma genus and the fleas were from the Xenopsylla genus. All the trapped rodents were Tatera indica. Serological results were negative for plague, but the serum agglutination test was positive for tularemia in one of the rodents. Tatera indica has never been previously documented to be involved in the transmission of tularemia. CONCLUSIONS: No evidence of the plague cycle was found in the rodents of the area, but evidence was found of tularemia infection in rodents, as demonstrated by a positive serological test for tularemia in one rodent.
Agglutination Tests ; Disasters ; Earthquakes* ; Enzyme-Linked Immunosorbent Assay ; Iran* ; Mortality ; Plague* ; Prevalence ; Rodentia* ; Serologic Tests ; Siphonaptera ; Ticks ; Tularemia* ; Xenopsylla

Tungiasis is an ectoparasitic disease that is caused by the penetration of Tunga penetrans into the epidermis of the host. Tungiasis is indigenous to South Americaand the Caribbean regions, but it has spread to Latin America, India, and sub-Saharan Africa. The area of soft skin such as the soles, toes, webs and subungual regions are the favored sites for sand flea embedding. As the flea enlarges within epidermis a pruritic, painful white or erythematous papulonodule develops. A black central punctum is characteristic. A 32-year-old woman presented with a small black crust on the right sole after traveling to an endemic area(Congo). Histopathologic examination revealed the internal organs of the arthropod embedded intothe epidermis, which allowed a definitive diagnosis of tungiasis. Although tungiasis is common in endemic areas, there has been no report of tungiasis in the Korean literature. We report herein an interesting case of tungiasis in a patient after traveling to Congo.
Adult ; Africa South of the Sahara ; Arthropods ; Caribbean Region ; Congo ; Epidermis ; Female ; Humans ; India ; Latin America ; Siphonaptera ; Skin ; Toes ; Tunga ; Tungiasis

Backgound: Plague disease is one of three most seriously infectious diseases (plague, yellow fever and cholera disease). In Vietnam, this condition has been obviously controlled. The number of new cases and deaths of plague disease have decreased significantly: from 439.6 patients between 1991 and 1995 to 161.2 patients between 1996 and 2000. However, the disease is still circulating in some areas in the world. Objective: To survey plague disease related factors (rats and fleas) at Noi Bai international airport. Subjects and method: A surveillance to inspect plague disease related factors (rats and fleas) was conducted at Noi Bai international airport, Ha Noi, from January/2006 to December/2006. Results and Conclusion: There were two types of rats: R. flavipectus in majority and R. norvegicus. The enrichment index of the two kinds of rats had increased in April and May. R. flavipectus disposed at flat form T1 and R. norvegicus disposed at store area. The only flea species found at the surveillance site was X.cheopis. Bacterial isolation of 236 specimens of liver and spleen, and ELISA tests of 180 blood samples were performed. All of the specimens were negative to Yersinia pestis. The study suggests that the rat populations at Noi Bai airport have not been infected with Yesinia pestis.
Plague/ epidemiology ; pathology ; Siphonaptera/ pathogenicity ; Rats ;

OBJECTIVETo understand the community structure of Rhombomys opimus parasitic fleas in the natural plague focus in Junggar Basin, so as to explain the relationship between the community structure and the prevalence of animal plague in this area.

METHODSThe body fleas of R.opimus which were collected in 2005-2010 from the Junggar Basin was analysed by community ecology method, an each clustered flea community was compared with information of pathogenic and serological indicators of animal plague epidemic by statistic method.

RESULTSThe community structure of R. opimus parasitic fleas included 19 species and was very complicated, with only 3 were identified as 'common' species but the others belonged to 'rare' species. Both the average richness and diversity of flea community were higher, as 1.66 and 1.5556, with dominance not obvious (0.332) and the homogeneity as moderate (0.5283). The community structure of R. opimus parasitic fleas could be changed by the following factors as: the rates of flea parasitic/flea index and the proportions of main fleas etc. The flea community could be divided into 5 clusters according to the above said elements. All these data showed that the fleas of R. opimus parasitic fleas possess the nature of multi-parasitism.

CONCLUSIONSThe community of R. opimus parasitic fleas existed heterogeneous of geographic region, and this phenomenon associated with the animal plague epidemic strength.

Animals ; Biota ; China ; epidemiology ; Gerbillinae ; parasitology ; Plague ; epidemiology ; veterinary ; Siphonaptera

OBJECTIVETo find out the vector ability and function of Nosopsyllus wualis leizhouensis in the transmitting plague.

METHODSIn T: 19 degrees C +/- 1 degrees C, RH: 85% +/- 5%, data regarding the vector ability as cluster spreading, single flea spreading, single flea transmitting plague to single animal, formative bacterial embolus and infection fleas life-span through experiments was gathered.

RESULTSThe rate of infection on fleas was 94.64%, with 100% transmission rate of colony to spread, and 30% from single flea spreading to single animal. In the experiment of single flea transmission, all of the 388 rattus loseas were bitten by the fleas with bacterial, but only 9 animals were characteristically infected with the transmission potential, vector efficiency, survival potential of embolus, vector index as 0.360, 0.257, 0.868 and 0.223 respectively. The mean survive days of infected flea feed with blood were 17.58 (1 - 58), and the mean survive days of hunger infected flea were 7.25 (1 - 16). Formative bacterial embolus days were 8.80 (2 - 16) and the rate of embolus flea was 78.12%.

CONCLUSIONNosopsyllus wualis leizhouensis could serve as vector and important in the mode of plague transmittion.

Animals ; Female ; Insect Vectors ; microbiology ; Male ; Plague ; transmission ; Rats ; Siphonaptera ; microbiology

Animals ; Dose-Response Relationship, Drug ; Humans ; Inhalation Exposure ; Mice ; Nanoparticles ; toxicity ; Rats ; Siphonaptera

Flea-borne transmission is a recent evolutionary adaptation that distinguishes the deadly Yersinia pestis from its progenitor Y. Pseudotuberculosis, a mild pathogen transmitted via the food-borne route. Y. Pestis synthesizes biofilms in the flea gut, which is important for fleaborne transmission. Yersinia biofilms are bacterial colonies surrounded by extracellular matrix primarily containing a homopolymer of N-acetyl-D-glucosamine that are synthesized by a set of specific enzymes. Yersinia biofilm production is tightly regulated at both transcriptional and post-transcriptional levels. All the known structural genes responsible for biofilm production are harbored in both Y. Pseudotuberculosis and Y. Pestis, but Y. Pestis has evolved changes in the regulation of biofilm development, thereby acquiring efficient arthropod-borne transmission.
Animals ; Biofilms ; Caenorhabditis elegans ; physiology ; Humans ; Plague ; transmission ; Siphonaptera ; microbiology ; Transcription, Genetic ; Yersinia ; genetics ; physiology

PURPOSE: The purpose of this study was to investigate the presence of Bartonella henselae DNA, which is known as an etiologic agent of lymphadenitis, in fleas from dogs. METHODS: The Bartonella henselae infection was investigated in 42 fleas from 22 dogs in Korea. By using seminested PCR targeting pap31 gene, B. henselae DNA was amplified from fleas. RESULTS: B. henselae DNA was detected in seven fleas (7 of 42 fleas, 16.7 percent) from four dogs (4 of 22 dogs, 18.2 percent). To confirm these findings, we performed sequencing and identified the seven PCR products. Sequence analysis revealed that six sequences belonged to Huston-1 genogroup and one sequence to Marseille genogroup. CONCLUSION: These results may suggest that dogs could be an important source of B. henselae infection in children in Korea. This is the first report about the detection of B. henselae in fleas from dogs in Korea.
Animals ; Bartonella henselae* ; Bartonella* ; Child ; DNA* ; Dogs* ; Genotype ; Humans ; Korea* ; Lymphadenitis ; Polymerase Chain Reaction ; Sequence Analysis ; Siphonaptera*

Rickettsial infections (Rickettsioses) are the causes of acute fever found in Thailand. It is classified as acute febrile illnesses transmitted by bloodsucking arthropod vectors (tick, flea, and chigger). This research investigated pathogens of scrub typhus in vectors from Bangkaew District, Phatthalung Province. A total of 303 pools of vector samples were ticks (Rhipicephalus sanguineus, R. microplus, and Haemaphysalis sp.), fleas (Ctenocephalides felis orientis, C. f. felis, and C. canis), and chiggers (Leptotrombidium deliense, Aschoschoengastia indica, Blankaartia acuscutellaris and Walchia disparunguis pingue) collected from reservoir hosts (dogs and rodents). The 17 and 56 kDa gene of Rickettsia causing scrub typhus were found in 29% of ticks and 98% of flea. DNA sequence analysis reveeled the detected strains were R. asembonensis and Rickettsia sp. cf1 and 5.The chiggers, 1%, were infected with Rickettsia strain TA763, a pathogen of scrub typhus.
Animals ; Arthropod Vectors ; Cats ; Felis ; Fever ; Orientia tsutsugamushi ; Rickettsia ; Scrub Typhus ; Sequence Analysis, DNA ; Siphonaptera ; Thailand ; Ticks ; Trombiculidae