Interval-locked dual-frequency φ-OFDR with an enhanced strain dynamic range and a long-term stability.

We report on an interval-locked dual-frequency phase-sensitive optical frequency-domain reflectometry relying on a common-reference optical phase-locked loop. With a shared unbalanced interferometry, this design allows for synchronizing the frequency drift of two lasers, leading to a steadily stabilized dual frequency with an arbitrary interval. Equivalently to a longer synthetic wavelength, their phase difference is utilized to demodulate the ambient changes of interest with an enhanced dynamic range and long-term stability.

Porcine deltacoronavirus and its prevalence in China: a review of epidemiology, evolution, and vaccine development.

Porcine deltacoronavirus (PDCoV) is one of the most important enteropathogenic pathogens, and it causes enormous economic losses to the global commercial pork industry. PDCoV was initially reported in Hong Kong (China) in 2012 and subsequently emerged in swine herds with diarrhea in Ohio (USA) in 2014. Since then, it has spread to Canada, South Korea, mainland China, and several Southeast Asian countries.

A Novel Human Acute Encephalitis Caused by Pseudorabies Virus Variant Strain.

Background: Pseudorabies virus (PRV) is a common pathogen in multiple animal species, particularly in pigs. However, PRV infection in humans is rare and, to the best of our knowledge, PRV has never been isolated from human cases before.

Methods: Four acute encephalitis cases in humans were confirmed as PRV infection based on clinical symptoms, laboratory diagnosis, and metagenomic next-generation sequencing (mNGS).

Isolation of Moraxella bovoculi from racehorses with keratoconjunctivitis.

Moraxella bovoculi was isolated and identified in ocular fluid samples collected from 9 racehorses with infectious keratoconjunctivitis in China in 2013. All 9 M. bovoculi isolates were hemolytic, Gram-negative diplococci that were phenylalanine deaminase positive.

Mycobacteriosis associated with Mycobacterium peregrinum infection in Red-crowned Cranes (Grus japonensis) in China.

We describe mycobacteriosis caused by Mycobacterium peregrinum in Red-crowned Cranes (Grus japonensis) in China. Isolates were identified by bacteriology, molecular identification methods, and phylogenetic analysis. This study shows that M.

Genome Sequence of a Circulating Human-Like Swine-Origin Influenza A Virus H3N2 Strain.

The full-genome sequence of A/swine/Henan/1/2010, a strain of influenza A virus isolated in central China, was determined. Phylogenetic analyses show that its eight genomic segments are human-like, and some of its segments have appeared in swine H1N2, swine H1N1, and human H1N2 influenza viruses.

Immunogenicity of two FMDV nonameric peptides encapsulated in liposomes in mice and the protective efficacy in guinea pigs.

It has been predicted that nonameric peptides I (VP1(26-34), RRQHTDVSF), II (VP1(157-165), RTLPTSFNY) and III (VP1(45-53), KEQVNVLDL) from the VP1 capsid protein of the foot-and-mouth disease virus (FMDV) are T cell epitopes. To investigate whether these peptides have immunological activity, BALB/c mice were immunized with peptide I, II or III conjugated with immunostimulating complexes (ISCOMs). A cytotoxic T lymphocyte assay was used to evaluate the cytotoxic activity induced by peptides along with by measuring peptide-specific T-cell proliferation and CD8(+) T lymphocyte numbers in whole blood and interferon (IFN)-γ production in peripheral blood mononuclear cells induced by peptides.