ABSTRACT:Chlamydiae are obligate intracellular bacteria with a unique biphasic developmental cycle ,and have close rela‐tionships with human .Emerging Chlamydia species such as Chlamydia ibidis ,Chlamydia avium and Chlamydia gallinacea changed the chlamydial taxonomy .The biggest change is the abandon of genus Chlamydophilaand its previous six species were recombined into genus Chlamydia ,which in together with the emerging species ,expands genus Chlamydia to 12 species .This paper briefly reviewed the latest taxonomy of Chlamydiae and their identification methods ,which include the classical biological characteristics and physico‐chemical properties ,modern molecular genetics ,and the newly developed whole genome analysis . Presently ,molecular genetics methods ,including sequence analysis of 16S rRNA ,ompA and other Chlamydia‐specific genes , are commonly used for chlamydial identification .

ABSTRACT:Many studies show that helminth‐derived molecules can induce immunoregulatory cells to form immune net‐work‐mediated immune ,thereby inhibiting allergic and autoimmune diseases .Helminth parasites can induce immune cell activa‐tion and produce cytokine .And parasites play an inhibitory effect to affect other immune related diseases .However ,the associ‐ation between helminths infections and immune related diseases does not always have an unequivocal outcome .While some hel‐minths infections protect against allergic diseases ,other helminth can exacerbate this immunopathology .

ABSTRACT:Norovirus infection in human and animals can cause acute viral gastroenteritis .With molecular biology ,cell culture and animal models of development ,the different groups of norovirus genome sequenced ,the virus capsid protein ex‐pressed in vitro in eukaryotic ,prokaryotic and plant systems ,and thus the characteristics of the virus with some new under‐standing and perspective .Recently ,an increasing number of studies were focused on the norovirus and related topics along with the research progress all around the world .Here we systematically expound the latest advances in norovirus research from dif‐ferent aspects ,such as genome structure and function ,cell culture ,tissue tropism ,epidemiology ,virus infection mechanism , detection methods and vaccine development .Furthermore ,different viewpoints for norovirus molecular evolution ,detection technology and transmission route will be discussed as well .

ABSTRACT:The guinea pigs were immunized by the Brucella vaccine through intradermal injections and the skin scratch respectively ,and then the immune effects of the two ways were evaluated .Serum samples were collected one month after the last injection and detected for the total IgG titer by interval ELISA .Cell‐mediated immune was evaluated by late‐onset hyper‐sensitivity .The guinea pigs were challenged with Brucella melitensis M5 ,and then were killed to isolated M5 from spleen of each guinea pig to compare the protective effects of two methods of immunization .The ELISA results showed that both of the two methods of immunization could induce strong humoral immune response ,and DTH response to Br‐PPD antigen were 100%in both methods .No significant difference in the immune protective effect of two methods was detected .Results of humoral im‐munity ,cellular immunity and protective effect showed the same effect by intradermal injections and skin scratches .

ABSTRACT:To understand the species distribution of nontuberculous mycobacteria (NTM ) in Fujian Province of China , we collected clinical Mycobacterium isolates in the Fuzhou Pulmonary Hospital from 2009 to 2012 .A total of 6 362 clinical My‐cobacteria isolates were identified as 5 713 (89 .8% ) M .tuberculosis complex and 649 (10 .2% ) NTM strains by conventional identification method .Then ,by means of hsp65‐and rpoB‐PCR‐RFLP methods ,649 NTM strains were identified as 24 spe‐cies or complex of NTM ,in which the top three species or complex with the highest occurrence frequency were M .intracellular , M .avium and M .abscessus ,accounting for 48 .5% ,21 .3% and 12 .5% respectively .The prevalence rate of NTM was 10 .2%among Mycobacterium culture‐positive patients .There are lots of NTM species infecting human being ,and the most prevalence NTM species was M .avium complex accounting for 67 .8% in Fujian Province .

ABSTRACT:To understand the status of contamination and antimicrobial resistance of Staphylococcus aureus (S .aureus) isolated from raw cow milk ,600 samples were collected from five different provinces in China .After isolation and identification of S .aureus from these samples ,157 S .aureus isolates were obtained .Furthermore ,their resistant phenotype and resistant gene were analyzed by MIC detection ,as well as nine drug‐resistance genes determination and analysis .The result revealed that most of the S .aureus isolates contained multiple antibiotic resistant genes ,and all of the isolates were resistant to penicillin . Of 98 .73% isolates were resistant to amoxicillin .Conversely ,all of the isolates were sensitive to enrofloxacin and vancomycin . Moreover ,there were 29 MRSA positive strains among which 22 strains carrying femA gene .In conclusion ,much more atten‐tion should be paid to the drug‐resistance capabilities of field S .aureus isolates in raw cow milk ,and further monitoring of drug resistant S .aureus strains in milk should also be strengthened so as to ensure milk safety .

ABSTRACT:To explore the feasibility of DNA barcoding in the identification of sandflies ,the mitochondrial cytochrome c oxidase subunit I (COI) genes of 9 dominant species in China from three genera in the Phlebotominae were studied .The in‐traspecies and interspecies genetic distances were calculated using the Kimura‐2‐parameter model ,and the phylogenetic trees were reconstructed by neighbor‐joining (NJ) method .Results showed that all of sandflies species were successfully distinguish‐ed by the phylogenetic trees .The average intraspecific genetic distance (0 .8% ) was much less than the average interspecific ge‐netic distance (11 .2% ) .The study based on COI sequences indicates that the sandflies from China could be well distinguished with the commonly used COI barcodes ,which are potentially well utilized in sandflies species identification .

ABSTRACT:The seasonal characteristics of Japanese encephalitis (JE) in Gansu Province in 1962-2010 were analyzed in order to provide reference for making strategies of disease control and prevention .The JE data is the Epidemic Data between 1962 and 2003 from Gansu CDC ,and National Notifiable Diseases Registry System (NNDRS ,2004-2010) .Concentration ra‐tio and circular distribution method were used in this study .Results showed that the M‐value of the seasonal distribution of JE in 1962-2010 was 0 .825 9 .The corresponding peak date of JE was the 30th August (95% CI:22 July to 7 October) .The Z value of Rayleigh test was 3 506 .092 5 (P<0 .01) .In conclusion ,the concentration and circular distribution method helps us to grasp the JE epidemic peak season more accurately .There were significant seasona1 characteristics for JE in Gansu Province and the epidemic peak was from late July to early October .

ABSTRACT:The virulence genes ,hemolytic and antibiotic resistance characteristics from 19 isolated Streptococcus suis se‐rotype 2 in Anhui Province were investigated in this study .The PCR method was developed for detecting cps2J ,mrp ,ep f and sly gene;the plate method and micro‐ELISA were developed for detecting the hemolytic type and hemolytic titer ;the K‐B method was developed for detecting antibiotic resistance of 25 kinds of antibiotics .Results showed that there were 11 strains with the dominant virulence genotype of cps2J+ /mrp+ /ep f+ /sly+ accounting for 57 .9% .All strains were α‐hemolysis orβ‐hemolysis ,with hemolytic titer of 1∶4 to 1∶128 .Strains sensitive to rifapentine ,ceftazidime ,florfenicol and cefazolin was existed in high frequency with the sensitive rates for 84 .2% ,and the resistance to doxycycline ,tetracycline ,bacitracin and sul‐famethoxazole was existed in high frequency with the resistance rates for 82 .9% .The multi‐antibiogram typing was doxycyc‐line ,tetracycline ,bacitracin and sulfamethoxazole account for 63 .2% .In conclusion ,the distribution of virulence genes of S .suis 2 Anhui isolates was similar with that of domestic reported strains ,and there was some differences with that of over‐seas reported strains .CPS ,MRP ,EPF and SLY are important virulence factors and the incompleteness of sly gene had no effect to its haemolyticus .The multi‐antibiotic resistance of S .suis 2 Anhui isolates was serious .There is difference for anti‐biogram typing between S .suis 2 Anhui isolates and those in other areas .

ABSTRACT:In this study ,we elucidated the predictors of progression to liver failure during severe acute exacerbation .We analyzed 69 consecutive patients with severe acute exacerbation of chronic hepatitis B for clinical outcome and factors that influ‐enced the development of liver failure ,including viral genotype ,PC (G1896A) and BCP (A1762T/G1764A) mutants .Thirty‐three (47 .8% ) severe acute exacerbation patients progressed to liver failure .Multivariate analysis identified serum bilirubin (TB>256 μmol/dL ,P=0 .008) and prothrombin activity (PTA<40% ,P<0 .001) as significant determinants of progression to liver failure .HBeAg negativity (P=0 .065) and PC mutant (P=0 .090) were associated with the progression to hepatic de‐compensation .Serum total bilirubin ,prothrombin activities ,HBeAg status and PC mutant were predictors of clinical outcome in patients with severe acute exacerbation of chronic hepatitis B .