Investigation of the Seroprevalence of Brucella Antibodies and Characterization of Field Strains in Immunized Dairy Cows by A19.

(1) Background: One method of eradicating brucellosis is to cull cattle that test positive for antibodies 12 months after being vaccinated with the 19-strain vaccine. Variations in immunization regimens and feeding practices may contribute to differences in the rate of persistent antibodies. We conducted this study to investigate the real positive rate of Brucella antibody in field strains of spp.

Study on the enantioselective behaviors, activity, toxicity and mechanism of novel SDHI fungicide benzovindiflupyr to reduce the environmental risks.

Benzovindiflupyr (BEN) has emerged as one of the fastest-growing SDHI fungicides in recent years, but it is considered "very highly toxic" to aquatic fish, invertebrates and crustaceans (EC or LC, 0.0035-0.056 mg/L, acute toxicity).

Enantioselective fate and risk assessment of chiral fungicide pydiflumetofen in rice-fish and wheat farming systems.

Fungicides have been widely used for reducing the losses caused by plant diseases. Rice and wheat are the most basic food crops, and the potential risks after applying fungicides are worthy of attention. Especially rice-fish farming system is an ecological symbiosis system that is beneficial to both environmental and ecological protection.

Stereoselective study on chiral fungicide metconazole in four kinds of fruits: Absolute configuration, SFC-MS/MS enantioseparation, degradation and risk assessment.

Metconazole is a novel chiral fungicide with two chiral carbon atoms, but the research on its stereoselective behavior is limited. Therefore, the stereoselective behaviors of metconazole in four fruits, including grape, peach, pear and jujube, were summarized in this study. After determining the absolute configuration of metconazole stereoisomers, a chiral separation method through supercritical fluid chromatography/tandem triple quadrupole mass spectrometry was first developed, which combined an improved QuEChERS method obtained the recoveries of 71.

Development of S-penthiopyrad for bioactivity improvement and risk reduction from the systemic evaluation at the enantiomeric level.

For the purpose of screening high-efficiency and low-risk green pesticides, a systematic study on fungicide penthiopyrad was conducted at the enantiomeric level. The bioactivity of S-(+)-penthiopyrad (median effective concentration (EC), 0.035 mg/L) against Rhizoctonia solani was 988 times higher than R-(-)-penthiopyrad (EC, 34.

Enantioselective Behaviors of Chiral Fungicide Penthiopyrad in Five Kinds of Crops and Whole-Age Dietary Risk Assessments.

Penthiopyrad is a widely used succinic dehydrogenase inhibitor fungicide with two enantiomers, while the data on its enantioselective behaviors in crops are limited. The enantioselective dissipation may directly or indirectly expose people to the preferentially residual enantiomer, which may affect the dietary risks of chiral penthiopyrad. In this study, the enantioselective behaviors of chiral penthiopyrad in five kinds of crops and whole-age dietary risk assessments were conducted.

BtpB Manipulates Apoptosis and Autophagic Flux in RAW264.7 Cells.

transfers effectors into host cells, manipulating cellular processes to its advantage; however, the mechanism by which effectors regulate cellular processes during infection is poorly understood. A growing number of studies have shown that apoptosis and autophagy are critical mechanisms for target cells to cope with pathogens and maintain cellular homeostasis. BtpB is a type IV secretion system effector with a complex mechanism for manipulating host infection.

Stereoselective bioaccumulation and dissipation of pyrisoxazole in earthworm-soil microcosm.

Pyrisoxazole is a chiral fungicide with high sterilizing activity to the plant pathogenic bacteria. It has two chiral C atoms, which bring four stereoisomers. The present work was the first time to explore the stereoselective bioaccumulation behavior of pyrisoxazole in earthworms by chiral liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (LC-Q-TOF/MS).

Comparative analysis of mitochondrial DNA datasets indicates that Cylicostephanus minutus represents a species complex.

Cyathostomins are one kind of the most important parasites in equids. Cylicostephanus minutus is a member of the subfamily Cyathostominae. In the present study, we determined the complete mitochondrial (mt) genomes from four Cs.