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A fuzzy identity-based signature (FIBS) allows a user with identity i to produce a signature that can be verified under identity j when and only when i and j are close to each other. Lattice-based cryptography is thus of high importance. Aiming to solve the unwanted disclosure of biometrics data in the biometrics applications and to enhance the computing efficiency and authentication security, adaptive security based on FIBS from lattices is proposed. On the basis of the definition and security model of the fuzzy identity fully homomorphic signature (FIFHS), the key homomorphism and partitioning technology can be used to assign values to any circuit of the signature message. The correctness and security of the scheme are derived and proved strictly, and the adaptive security existential unforgeability of the scheme under adaptive chosen message and identity attacks is reduced to the module short integer solution (MSIS) problem, which is as difficult as approximating the worst-case module-generalized independent vectors problem (Mod-GIVP). [ABSTRACT FROM AUTHOR]

Histomonas meleagridis is a facultative anaerobic parasite, which can cause a common poultry disease known as histomoniasis. The species and age of the birds impacts on the susceptibility, with turkey being the most susceptible species. Chickens are less susceptible to H. meleagridis than turkeys and usually serve as reservoir hosts. Here, the diagnosis of an outbreak of histomoniasis in backyard Sanhuang chickens is described. The primary diagnosis was made based on clinical symptoms, general changes at necropsy, histopathology, and the isolation and cultivation of parasites. The pathogen was further confirmed by cloning, PCR identification, and animal inoculation tests. A strain of H. meleagridis, named HM-JSYZ-C, with a higher pathogenicity level in chickens was obtained. The study lays a foundation for further investigations into H. meleagridis and histomoniasis in chickens. [ABSTRACT FROM AUTHOR]

To control coccidiosis without using prophylactic medications, a DNA vaccine targeting the gametophyte antigen Gam56 from Eimeria maxima in chickens was constructed, and the immunogenicity and protective effects were evaluated. The ORF of Gam56 gene was cloned into an eukaryotic expression vector pcDNA3.1(zeo)+. Expression of Gam56 protein in COS-7 cells transfected with recombinant plasmid pcDNA-Gam56 was confirmed by indirect immunofluorescence assay. The DNA vaccine was injected intramuscularly to yellow feathered broilers of 1-week old at 3 dosages (25, 50, and 100 μg/chick). Injection was repeated once 1 week later. One week after the second injection, birds were challenged orally with 5 x 104 sporulated oocysts of E. maxima, then weighed and killed at day 8 post challenge. Blood samples were collected and examined for specific peripheral blood lymphocyte proliferation activity and serum antibody levels. Compared with control groups, the administration of pcDNA-Gam56 vaccine markedly increased the lymphocyte proliferation activity (P < 0.05) at day 7 and 14 after the first immunization. The level of lymphocyte proliferation started to decrease on day 21 after the first immunization. A similar trend was seen in specific antibody levels. Among the 3 pcDNAGam56 immunized groups, the median dosage group displayed the highest lymphocyte proliferation and antibody levels (P< 0.05). The median dosage group had the greatest relative body weight gain (89.7%), and the greatest oocyst shedding reduction (53.7%). These results indicate that median dosage of DNA vaccine had good immunogenicity and immune protection effects, and may be used in field applications for coccidiosis control. [ABSTRACT FROM AUTHOR]