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Yu Y, Li X, Liu Z, Xu Y, Shen Y, Li G, Huang X. Effects of Chlortetracycline Rumen-Protected Granules on Rumen Microorganisms and Its Diarrhea Therapeutic Effect. Front Vet Sci 2022; 9:840442. [PMID: 35252427 PMCID: PMC8894847 DOI: 10.3389/fvets.2022.840442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/26/2022] [Indexed: 11/13/2022] Open
Abstract
Chlortetracycline is a broad-spectrum antibiotic used as an oral medication in ruminants. However, this antibiotic affects the rumen microbial population, thereby upsetting the normal microbiota of ruminants. This study determined whether our newly developed chlortetracycline rumen-protected granules are relatively harmless to rumen microorganisms while effective against lamb E. coli diarrhea. We used a qPCR assay to quantify selected rumen microorganisms from lambs treated with or without oral chlortetracycline. We also assessed bacterial diversity in the rumen by 16S rRNA gene sequencing. Lambs were divided into three groups: one group given with oral chlortetracycline granules for 7 days; one group with chlortetracycline premix; and one without treatment. Rumen fluid was collected on 0 d, 7 d, and 14 d of the experiment. In the therapeutic effect trial, cases of naturally E. coli-infected lamb with diarrhea were selected and divided into low, medium, and high dose groups of granules, premix, infection control, and healthy control groups. Treatments were continuously administered for 7 days, and animals were observed for 14 days after drug withdrawal to score and evaluate the treatment effect. Results of qPCR and 16S rRNA gene sequencing showed that the granules could diminish the impact of chlortetracycline on rumen microorganisms compared with the premix. The diarrhea therapeutic effect trial showed that the oral administration of the chlortetracycline rumen-protected granules at the dose of 30 mg/kg·bw/d for 7 days could effectively treat lamb diarrhea caused by E. coli. In conclusion, we provide a new drug preparation of chlortetracycline that can diminish the effect on the rumen microbiota while treating diarrhea caused by E. coli.
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Affiliation(s)
- Yang Yu
- Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Xin Li
- Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Ziyao Liu
- Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Ying Xu
- Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Yue Shen
- Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Guoji Li
- Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Xianhui Huang
- Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
- *Correspondence: Xianhui Huang
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Sofyan A, Sakti AA, Herdian H, Khairulli G, Suryani AE, Karti PDMH, Jayanegara A. In vitro gas production kinetics and digestibility of king grass (Pennisetum hybrid) added by organic mineral and natural crude tannin. JOURNAL OF APPLIED ANIMAL RESEARCH 2016. [DOI: 10.1080/09712119.2015.1129339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Ahmad Sofyan
- Division of Feed and Animal Nutrition, Research Unit for Chemical Processes Development and Engineering (UPT. BPPTK), Indonesian Institute of Sciences (LIPI), Gading, Playen, Gunungkidul DI. Yogyakarta,Indonesia
| | - Awistaros Angger Sakti
- Division of Feed and Animal Nutrition, Research Unit for Chemical Processes Development and Engineering (UPT. BPPTK), Indonesian Institute of Sciences (LIPI), Gading, Playen, Gunungkidul DI. Yogyakarta,Indonesia
| | - Hendra Herdian
- Division of Feed and Animal Nutrition, Research Unit for Chemical Processes Development and Engineering (UPT. BPPTK), Indonesian Institute of Sciences (LIPI), Gading, Playen, Gunungkidul DI. Yogyakarta,Indonesia
| | - Gumilang Khairulli
- Department of Animal Nutrition and Feed Technology, Faculty of Animal Sciences, Bogor Agricultural University (IPB), Bogor, Indonesia
| | - Ade Erma Suryani
- Division of Feed and Animal Nutrition, Research Unit for Chemical Processes Development and Engineering (UPT. BPPTK), Indonesian Institute of Sciences (LIPI), Gading, Playen, Gunungkidul DI. Yogyakarta,Indonesia
| | - Panca Dewi Manu Hara Karti
- Department of Animal Nutrition and Feed Technology, Faculty of Animal Sciences, Bogor Agricultural University (IPB), Bogor, Indonesia
| | - Anuraga Jayanegara
- Department of Animal Nutrition and Feed Technology, Faculty of Animal Sciences, Bogor Agricultural University (IPB), Bogor, Indonesia
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Ravva SV, Sarreal CZ, Mandrell RE. Altered protozoan and bacterial communities and survival of Escherichia coli O157:H7 in monensin-treated wastewater from a dairy lagoon. PLoS One 2013; 8:e54782. [PMID: 23349969 PMCID: PMC3551901 DOI: 10.1371/journal.pone.0054782] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Accepted: 12/18/2012] [Indexed: 02/03/2023] Open
Abstract
Surviving predation is a fitness trait of Escherichia coli O157:H7 (EcO157) that provides ample time for the pathogen to be transported from reservoirs (e.g. dairies and feedlots) to farm produce grown in proximity. Ionophore dietary supplements that inhibit rumen protozoa may provide such a selective advantage for EcO157 to proliferate in lagoons as the pathogen is released along with the undigested supplement as manure washings. This study evaluated the fate of an outbreak strain of EcO157, protozoan and bacterial communities in wastewater treated with monensin. Although total protozoa and native bacteria were unaffected by monensin, the time for 90% decrease in EcO157 increased from 0.8 to 5.1 days. 18S and 16S rRNA gene sequencing of wastewater samples revealed that monensin eliminated almost all colpodean and oligohymenophorean ciliates, probably facilitating the extended survival of EcO157. Total protozoan numbers remained high in treated wastewater as monensin enriched 94% of protozoan sequences undetected with untreated wastewater. Monensin stimulated 30-fold increases in Cyrtohymena citrina, a spirotrichean ciliate, and also biflagellate bicosoecids and cercozoans. Sequences of gram-negative Proteobacteria increased from 1% to 46% with monensin, but gram-positive Firmicutes decreased from 93% to 46%. It is noteworthy that EcO157 numbers increased significantly (P<0.01) in Sonneborn medium containing monensin, probably due to monensin-inhibited growth of Vorticella microstoma (P<0.05), a ciliate isolated from wastewater. We conclude that dietary monensin inhibits ciliate protozoa that feed on EcO157. Feed supplements or other methods that enrich these protozoa in cattle manure could be a novel strategy to control the environmental dissemination of EcO157 from dairies to produce production environments.
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Affiliation(s)
- Subbarao V Ravva
- Produce Safety and Microbiology Research Unit, U.S. Department of Agriculture, Agriculture Research Service, Western Regional Research Center, Albany, California, USA.
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Laukova A, Turek P. Application of nisin into slovak fermented salami Púchov. POTRAVINARSTVO 2012. [DOI: 10.5219/218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Púchov salami is favorite fermented salami among Slovak consumers. Nisin is the only bacteriocin accepted by European Commission for a commercial use as additive for food preservation (although not commonly used in meat products). Because of its possibility to prolonge shelf-life of the products and its antimicrobial activity, its effect in dry fermented Slovak salami Púchov experimentally inoculated with Listeria innocua Li1 strain was checked. The initial number of L. innocua Li1 in the inoculated salami mixtures was 104 CFU/g (log 10; 4.04 ± 0 07). After nisin addition, the count of Li1 strain in the meat samples (inoculated with Li1 and treated by nisin) was 1.36±0.07 CFU/g; difference 2.68 logarithmic cycle was noted between Li and Li/Ni samples. At day 2, the difference 3.23 log cycle was detected between Li1 and Li/Ni samples (Li:5.46±0.08, Li/Ni: 2.14±0.07 CFU/g); at weeks 3, 4, it was 1.69 and 1.80 log cycle. Activity of nisin itself was not recovered from the experimental salamis by the analytical method; however, its inhibitory effect was shown by Li1 count decrease. The pH in salamis during processing was almost at the same level (5.52, 5.53, 5.55). Water activity was not negatively influenced. Water content in Li/Ni salamis reached almost requested levels (maximum percentage of water requested is 34 %).
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Effect of recombinant divercin RV41, structural variants and the activators of potassium channels on Listeria monocytogenes EGDe. Folia Microbiol (Praha) 2011; 56:110-5. [PMID: 21468759 DOI: 10.1007/s12223-011-0024-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2009] [Accepted: 01/15/2011] [Indexed: 10/18/2022]
Abstract
The effect of recombinant divercin RV41 (DvnRV41) and its structural variants on the K-channel formation was determined. The growth of Listeria monocytogenes EGDe (sensitive phenotype) and its isogenic strain (resistant phenotype) was assessed in the presence of DvnRV41 combined or not with pinacidil, NS1619, cromakalim (as K-channel activators), iberiotoxin and glipizide (as K-channel blockers). The combined action of DvnRV41 and K activators permitted formation of ATP-dependent pores. The combination of DvnRV41 and ATP-dependent pore activator cromakalim inhibited the growth of sensitive strain. The antilisterial activity of structural variants was less important than that of DvnRV41 but their mode of action remained overall similar.
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