Poultry red mite (PRM, Dermanyssus gallinae) is a blood-sucking ectoparasite as well as a possible vector of several avian pathogens. In this study, to define the role of PRM in the prevalence of avian infectious agents, we used polymerase chain reaction (PCR) to check for the presence of seven pathogens: Avipox virus (APV), Fowl Adenovirus (FAdV), Marek’s disease virus (MDV), Erysipelothrix rhusiopathiae (ER), Salmonella enterica (SE), Mycoplasma synoviae (MS) and Mycoplasma gallisepticum (MG). A total of 159 PRM samples collected between 2004 and 2012 from 142 chicken farms in 38 prefectures in Japan were examined. APV DNA was detected in 22 samples (13.8%), 19 of which were wild-type APV. 16S ribosomal RNA (16S rRNA) of MS was detected in 15 samples (9.4%), and the mgc2 gene of MG was detected in 2 samples (1.3%). Eight of 15 MS 16S rRNA sequences differed from the vaccine sequence, indicating they were wild-type strains, while both of the MG mgc2 gene sequences detected were identical to the vaccine sequences. Of these avian pathogen-positive mite samples, three were positive for both wild-types of APV and MS. On the other hand, the DNAs of ER, SE, FAdV and MDV were not detected in any samples. These findings indicated that PRM can harbor the wild-type pathogens and might play a role as a vector in spreading these diseases in farms.
Livestock production has increased in many emerging economies, but productivity is often substantially impaired by infectious diseases. The first step towards improved livestock health and productivity is to map the presence of livestock diseases. The objective of this review was to summarize studies conducted on such diseases in an emerging economy, Vietnam, and thereby identifying knowledge gaps that may inform the design of surveillance and control programs. Few studies were found to evaluate the distribution of infectious livestock diseases other than avian influenza. Also, many regions with dense livestock populations had received little attention in terms of disease investigation. A large proportion of the studies dealt with zoonoses and food-borne infections which might be due to funding agencies priorities. On the contrary, studies targeting infections that affect livestock and their productivity were few. We think that this limitation in scientific reports on infectious diseases that only affect livestock productivity is a common phenomenon in low and lower middle income countries. More science-based data on such diseases would help policymakers to prioritize which livestock diseases should be subject to animal health programs aimed to support rural livelihoods and economic development.
Abstract:The Paris Agreement requests to establish the transparency framework to clarify, and track the progress towards achieving Parties' National Determined Contributions and Parties' adaptation actions. Monitoring Reporting and Verification (MRV) for adaptation aims to enhance the transparency, and to check progress and the effectiveness of the adaptation actions. Developing the indicators for monitoring the adaptation actions contributes to the development of the adaptation MRV system. This paper focuses on the process of establishing the indicators to monitor adaptation action in forestry sector, Quang Ngai Province, Viet Nam. After two rounds of the Delphi technique are applied, the indicators are then grouped into 3 clusters based on the Result Based Management tool (Adaptation Capacity, Adaptation Actions, and Sustained Development in climate change) to identify the effectiveness of adaptation action. Our study found that 8 out of 10 indicators were ranked in the 4-5 range (likely relevant to highly relevant), which means they should be applied in Quang Ngai province. As indicated by the experts, 02 indicators (Salinity, and Percentage of saltwater intrusion areas) were not appropriate due to the unclear effectiveness of adaptation action. The set of indicators could be used to monitor the progress of project implementation. Monitoring the implementation progress of adaptation action contributes to the commitment of adaptation component under Vietnam's NDC and the development of the MRV system for adaptation. The MRV for adaptation needs to be further researched and developed.
Salmonella spp. and E. coli isolated from 515 samples collected from poultry farms at the north Vietnam. The results showed that the presence of E. coli in the poultry farm was 59.4%. The highest positive rate was fecal samples 78.0%; following by sewages samples (77.8%), poultry house floors swap samples (68.0%), drinking water (17.8%), tools samples (16.7%) and none of 45 food samples were E. coli positive isolation. In this study, 37 samples (7.2%) were Salmonella positive isolation including 10.0% fecal samples; 9.3% poultry house floors swap and 6.7% seweages samples. The E.coli isolates were highly resistant to tetracycline (85.3%), streptomycin (83.3%), ampicillin (61.8%), trimethoprim (56.9%) and nalidixic acid (55.9%). They were low resistant to ceftazidime (6.9%) and nitrofurantoin (12.7%). The other antibiotics such as norfloxacin, ciprofloxacin and gentamicin were resisted by E.coli isolates range from 15.7% to 32.4%. In our results, the Salmonella isolates were commonly resistant to streptomycin (89.2%), tetracycline (83.8%) and ampicillin (59.5%). Three antibiotic such as ciprofloxacin, gentamicin and norfloxacin were resisted by the Salmonella isolates with the similar rates (21.6%). Salmonella isolates showed resistance to ceftazidime at the lowest rate (16.2%). Of the isolated trains, 65.7% of the E. coli and 62.2% of the Salmonella isolates showed multi-drug resistance. The data suggest that detection of resistance isolates from chicken, poultry environment, and humans need for one health consideration in the usage of antibiotics in the poultry industry.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.