Objective To investigate the specific immune therapeutic effect of the T cell fusion peptide vaccine from group II allergens from Dermatophagoides pteronyssinus(Der p2). Methods Thirty mice were randomly divided into three groups, namely a negative control group(a PBS group),positive control group(an asthma group)and protein Der p2 T cell fusion epit?ope for specific immunotherapy(SIT)group(a Der p2 T group). The extract of house dust mites(HDM)was used to establish the asthmatic models in BALB/c mice,and the PBS group was always used with PBS buffer. Thirty minutes before spray inhala?tion from 25 to 27 days,the mice of the Der p2 T group were respectively injected subcutaneously with the therapeutic proteins for SIT,then the serum and bronchoalveolar lavage fluid(BALF)were collected. ELISA was used to assay the levels of IFN?γ, IL?4,and IL?13 in BALF,as well as serum levels of specific IgE and IgG2a. The lung tissue sections were stained with haematox?ylin and eosin(H&E)for pathological examinations. Results The ELISA detection revealed that the number of eosinophil in BALF of the asthmatic mice was(5.57 ± 0.64)× 105/ml,which was significantly higher than that in the PBS group[(0.50 ± 0.30)× 105/ml,P < 0.01],the number of eosinophil in the Der p2 T immunotherapy group decreased significantly[(3.45 ± 0.36)×105/ml,P<0.01]. The content of IFN?γin the PBS group,asthma group and Der p2 T group were(267.00 ± 21.98), (155.80 ± 20.53)pg/ml and(234.40 ± 24.46)pg/ml respectively. Compared with the asthma group,the mice with Der p2 T vac?cine specific immune treatment produced a high level of IFN?γ(P<0.01). The content of IL?4 in the PBS group,asthma group and Der p2 T group were(23.40 ± 5.96),(53.28 ± 8.26)pg/ml and(30.00 ± 5.50)pg/ml respectively. Compared with the asth?ma group,the content of IL?4 in the mice of the Der p2 T treatment group was significantly lower(P<0.01). Compared with the asthma group[(308.10 ± 28.32)pg/ml],the content of IL?13 in BALF of the mice in the Der p2 T treatment group was signifi?cantly decreased,which was[(174.50 ± 25.99)pg/ml,P<0.01]. The content of IL?13 in the PBS group was(95.99 ± 31.14) pg/ml. The lung tissue sections showed that the lung inflammation in the p2 T Der group was significantly less than that in the asthma group,and the inflammatory cell infiltration was significantly decreased,and airway epithelial construction remodeled. Conclusion The Der p2 T cell fusion epitope,which is as vaccines for specific immunotherapy with asthma models,can allevi?ate effectively allergic inflammation of airway and lung in the mice,and it may be used as a candidate vaccine for asthma.

Objective To explore the anti-HBV activity of anodonta polysaccharides (AP) and dose-effect relationship in vitro.Methods HepG2.2.15 cells were cultured in vitro and incubated at 37℃ for nine days with AP at a dilution ratio of 1∶10.The expression of HBsAg and HBeAg were detected using ELISA and HBV-DNA copies were detected by real-time fluorescent quantitative PCR.Based on Thiele-type continued-fraction interpolation method,the anti-HBV activity of AP was studied,and the IC50 and the maximum inhibition rate were calculated.Results AP had significant inhibitory effect on the expression of HBsAg and HBeAg in HepG2.2.15 cells in vitro,as well as HBV DNA replication.By Thiele-type continued-fraction interpolation the equations of dose-effect relationship were obtained to determine the maximum inhibition rates of AP on HBeAg and HBsAg secretion being 47.7％ and 56.4％,and the IC50 inhibiting the expression of HBeAg being 143.7mg/L.AP was also able to inhibit HBV-DNA replication and the maximum inhibition rate was 17.8％ with the same method above.Conclusion Anodonta polysaccharides have anti-HBV activity.The thiele-type continued-fraction interpolation method is simple and practical and could be used as a new method for the analysis of drug activity.

Objective To investigate whether there is Blomia tropicalis breeding in the flour warehouse of food factory in a civil aviation airport,and,if there is,to observe the morphological structure of the mite. Methods The flour samples were col-lected from the flour warehouse of food factory in a civil aviation airport. The breeding mites were isolated from the samples by di-rect microscopy and made into specimens to observe with a light microscope. Results Female Blomia tropicalis was found in the collected flour samples. Under the microscope,the mite was nearly spherical,and it had no tergum and claw. Its apodemeⅠwas developed and connected in the midline. The reproductive hole was located between the foot Ⅲand IV level and was cov-ered with a pair of oblique genital folds. The footⅢandⅣhad no solenoids. The copulatory pouch was a long,slightly curved tube,extending from the end of the mite. Conclusions Blomia tropicalis has been found in the flour warehouse of a food factory in the civil aviation airport. The main distinguishing feature of this mite is that it has no tergum,its feet have no pectinate inferi-or tarsus scales or claw,the feetⅠgenu has only one solenidia,and feetⅢandⅣhave no solenidias.

Objective To investigate the breeding quantity and average breeding density of Gohieria fuscus in the grand dust flour of a flourmill and explore the prevention and control measures. Methods A certain amount of grand dust flour was collect-ed from a flourmill,and it was sieved. The powder was placed into the glass pan,and the mites were sought out under an optical microscope and made of specimens. The mites were identified on the basis of literature. Results In this survey,400 g samples were collected from 4 habitats. The average breeding density of mites was 3516/g. The mite was identified as Gohieria fuscus. Conclusions Gohieria fuscus is one of the widely distributed stored mites. It impacts the stored food and reduces the quality of food. In addition,the mite affects human health. Therefore,the preventive measures should be taken.

Objective To report the seizure of Laelaps echidninus on the surface of Apodemus agrarius in Wuhu area for the first time,which prompts that there may exist the spread of the diseases by mites. Methods The mites got from the rats poi-soned by bait were made as the routine slide specimen and then identified with the reference of previous literature. Results The mites seized from Apodemus agrarius were 8 female ones totally and identified as Laelaps echidninus. Conclusion There exsits Laelaps echidninus parasitic on the body of Apodemus agrarius in Wuhu area,which should be paid attention to seriously in order to prevent the spread of diseases by it.

Here we report a case of dermatitis caused by Tyrophagus putrescentiae,and have reviewed the related literature, then summarize the clinical characteristics and treatments of dermatitis in order to improve the understanding of the disease.

Objective To investigate the Suidasia nesbitti breeding status in the ground dust flour collected in Qiqihaer City. Methods Totally,16 aliquots of ground dust flour were respectively collected from a college canteen and 15 households in Qiq-ihaer City. Then 10 g dust flour was taken from individual sample for isolation of the mites that were made of slide specimen,and the mites were identified and classified under a microscope. Results Acaroid mites were found in 15 of the 16 aliquots of sam-ples(detection rate being 93.8%),and 7 species,belonging to 6 genera under 3 families,were identified. A total of 561 heads of mites were isolated from 160 g samples,with an average breeding density of 3.51 heads/g. The most breeding mite was associ-ated with S. nesbitti. Conclusions Various species of mites are breeding in the ground dust flour in Qiqihaer City,and S. nesbit-ti occurs the most. These findings indicate that effective measures should be taken to prevent and control the harm associated with acaroid mite contamination.

Objective To observe the external morphology of Lepidoglyphus destructor hypopus under an optical microscope. Methods The samples were collected in a store of Chinese medicinal herbs in Huainan City in September,2016,the L. de-structor and the hypopus were isolated,and then made of slide specimens. The slide samples were prepared and observed under an optical microscope. Results The L. destructor hypopus and protonymph were found. The inactive hypopus was oval in shape, the feet were not well-developed,there was a distinct transverse seam on its back,and there were 2 pairs of genital sensory or-gans. Conclusion The optical microscopy shows the morphological characteristics of L. destructor hypopus,which can provide the basis for the biological classification and the prevention.

Objective To separate and identify Thyreophagus entomophagus from beer yeast powder and observe its morpho?logical characteristics. Methods The beer yeast powder was collected from the scum after fermentation of the beer material, the mites in it were separated and made into slide specimens,and then they were identified and observed for the morphological characteristics under an optical microscope. Results The mites separated from the beer yeast powder were identified as female Thyreophagus entomophagus. Under the optical microscope,the bodies of the mites were long and narrow,which showed an oval shape,the gnathosoma was wide,the epidermis was colorless but lustrous,the external vertical seta,internal scapular seta,in?ner humerals,anterior lateral seta,and dorsal body setae were all absent,the bristles on the back of the body were relatively long,and all the feet were thick and strong. Conclusion Thyreophagus entomophagus can breed in the beer yeast powder,and therefore,the powder should be stored properly to avoid the contamination caused by the mites.

Objective To observe and understand the morphology and structure of Acarophenax tribalii in order to create a new record of this mite in China. Methods The stored grain samples(rice and brown rice)were collected from the storage of lo?cal dwellers,and mites breeding in the products were isolated. Then mite samples were prepared and identified as the previous protocols,and the species was classified in accordance with Hughes. Results A. tribalii was detected in the grain samples. The light microscopic examination exhibited ovally shaped idiosoma of this species,and the abdomen of the male was more inflated than that of the female. By general view,the propodosomatal plate appeared triangle?like,and its anterior margin was covered by the gnathosoma. Leg I consisted of four segments,and its tibia and tarsus healing were fused into a stubby tibiotarsus. A tarsulus occurred at the end of legⅡ,ⅢandⅣ,with a claw born at each leg. Conclusion The morphology and structure of A. tribalii are characterized. This may lay a basis for following study on this species.