Survey of Serum Amyloid A and Bacterial and Viral Frequency Using qPCR Levels in Recently Captured Feral Donkeys from Death Valley National Park (California)
ANIMALS
Authors: Jerele, Sara; Davis, Eric; Mapes, Samantha; Pusterla, Nicola; Navas Gonzalez, Francisco Javier; Iglesias Pastrana, Carlos; Mahmoud Abdelfattah, Essam; McLean, Amy
Abstract
Simple Summary This study aimed to measure the inflammatory marker (Serum Amyloid A; SAA) derived from such pathogenic processes specifically bacterial and virus found in recently captured feral donkeys. Quantitative Real-Time PCR (qPCR) was performed to detect and quantify RNA and DNA viruses and bacterial DNA. Behavior, body condition score, nasal discharge, and coughing were found to be related in cases of Asinine Herpesvirus 2 (AHV-2) andStreptococcus equisubspecieszooepidemicusDNA. SAA concentrations descended with age, with foals presenting higher concentrations. Positive tests differed for AHV-2 andStreptococcus equispp.zooepidemicusbetween sampling moments. In conclusion, donkeys caught in the wild may not be a source of disease for domestic horses. However, the transmission of some pathogens, such asStreptococcus equisubspecieszooepidemicus,and/or AHV-2, may occur. Feral donkey removal from state land has raised concerns in terms of disease transmission between equine species. Disease outbreaks may occur as a result of the relocation of animals to new environments. Virus and bacteria DNA load and serum amyloid A derived from the pathogenic processes that they involve were measured in recently captured donkeys. Blood and nasal swabs were collected from 85 donkeys (Death Valley National Park, Shoshone, California); 24 were retested after 30/60 days in the Scenic (Arizona) long-term holding facility co-mingled with feral donkeys from Arizona and Utah. Quantitative Real-Time PCR (qPCR) was performed to detect viral and bacterial genomic material (equine influenza A [EIV], equine rhinitis A and B viruses, AHV-2, AHV-3, AHV-5 and EHV-1, EHV-4,Streptococcus equisubspeciesequiandzooepidemicus,). Significant relations between behavior, body condition score, nasal discharge, and coughing were found in donkeys for which AHV-2 andStreptococcus zooepidemicusDNA was detected. Higher SAA concentrations were found in foals. AHV-2 andStreptococcus zooepidemicusDNA concentrations significantly differed between sampling moments (p< 0.05). In conclusion, donkeys do not appear to be a substantial risk for disease transmission to horses but could be if they carried strangles or other processes in which AHV-2 andStreptococcus zooepidemicuswere involved.
Long-term effects of Fe3O4 NPs on the granule-based anaerobic ammonium oxidation process: Performance, sludge characteristics and microbial community
JOURNAL OF HAZARDOUS MATERIALS
Authors: Xu, Jia-Jia; Cheng, Ya-Fei; Jin, Ren-Cun
Abstract
The performance of anaerobic ammonium oxidation (anammox) granules were studied under long-term exposure to Fe3O4 NPs. The Fe3O4 NPs had no negative impacts on nitrogen removal performance with the addition of 2-200 mg L-1. The specific anammox activity (SAA) slightly decreased from 287.0 +/- 13.2 to -253.0 +/- 9.2 mg TN g(-1)VSS d(-1) with the increase in Fe3O4 NPs level from 2 to 60 mg L-1, and then significantly enhanced to 381.8 +/- 15.7 mg TN g(-1)VSS d(-1) at 200 mg L-1 Fe3O4 NPs. And the change trends of the heme c content, extracellular polymeric substance amount and settling velocity were consistent with that of SAA. The Candidatus_Kuenenia was the dominant species during the entire experiment and its relative abundance was up to 33.4 % at the end the experiment. The results provide some useful information for comprehending the impact of Fe3O4 NPs on the performance of wastewater biological treatment systems.