Subtopic Deep Dive
Brachyspira Species in Intestinal Spirochetosis
Research Guide
What is Brachyspira Species in Intestinal Spirochetosis?
Brachyspira species are anaerobic spirochetes causing intestinal spirochetosis in pigs and humans, with key pathogens including Brachyspira pilosicoli and Brachyspira hyodysenteriae linked to swine dysentery.
Research focuses on Brachyspira pilosicoli and hyodysenteriae virulence factors, diagnostics via molecular typing, and zoonotic risks. Studies document prevalence in pig herds and associations with disease (Lee and Hampson, 1994; 127 citations). Cultivation and morphology of Brachyspira aalborgi established foundational human pathology (Hovind-Hougen et al., 1982; 222 citations).
Why It Matters
Control of Brachyspira infections reduces swine dysentery outbreaks and production losses, as nutritional factors influence disease severity (Pluske et al., 2002; 233 citations). Pleuromutilin antibiotics like tiamulin target resistant Brachyspira strains via ribosomal mutations (Pringle et al., 2004; 120 citations; Paukner and Riedl, 2016; 194 citations). Zoonotic potential from pig to human transmission requires surveillance, with prevalence data aiding farm management (Stege et al., 2000; 136 citations).
Key Research Challenges
Antibiotic Resistance Mechanisms
Mutations in ribosomal protein L3 and 23S rRNA reduce tiamulin susceptibility in Brachyspira isolates (Pringle et al., 2004; 120 citations). Pleuromutilins face cross-resistance challenges across species (Paukner and Riedl, 2016; 194 citations). Developing alternatives remains critical for treatment efficacy.
Species Identification and Typing
Multilocus enzyme electrophoresis revealed genetic diversity among 175 Brachyspira isolates from pigs and humans (Lee and Hampson, 1994; 127 citations). New species like Serpulina intermedia require precise DNA-DNA hybridization (Stanton et al., 1997; 115 citations). Accurate diagnostics hinder outbreak tracking.
Transmission and Zoonotic Risk
Prevalence in Danish pig herds shows Brachyspira alongside other pathogens, complicating source attribution (Stege et al., 2000; 136 citations). Nutritional influences exacerbate enteric diseases, aiding transmission (Pluske et al., 2002; 233 citations). Human-pig links need better epidemiological models.
Essential Papers
Nutritional influences on some major enteric bacterial diseases of pig
J.R. Pluske, D.W. Pethick, D. E. Hopwood et al. · 2002 · Nutrition Research Reviews · 233 citations
Abstract There are several enteric bacterial diseases and conditions of pigs that require control to prevent overt disease, to reduce morbidity and mortality, and to improve the efficiency of produ...
Intestinal spirochetosis: morphological characterization and cultivation of the spirochete Brachyspira aalborgi gen. nov., sp. nov
Kari Hovind‐Hougen, A. Birch‐Andersen, R. Henrik-Nielsen et al. · 1982 · Journal of Clinical Microbiology · 222 citations
The ultrastructure of spirochetes obtained from rectal biopsies of patients with intestinal spirochetosis was studied by means of negative staining and ultrathin sectioning. The cells were sigmoida...
Pleuromutilins: Potent Drugs for Resistant Bugs—Mode of Action and Resistance
Susanne Paukner, Rosemarie Riedl · 2016 · Cold Spring Harbor Perspectives in Medicine · 194 citations
Pleuromutilins are antibiotics that selectively inhibit bacterial translation and are semisynthetic derivatives of the naturally occurring tricyclic diterpenoid pleuromutilin, which received its na...
<i>Salmonella</i>in the pork production chain and its impact on human health in the European Union
S. Bonardi · 2017 · Epidemiology and Infection · 171 citations
SUMMARY Salmonella spp. comprise the second most common food-borne pathogens in the European Union (EU). The role of pigs as carriers of Salmonella has been intensively studied both on farm and at ...
Targeted oral delivery of BmpB vaccine using porous PLGA microparticles coated with M cell homing peptide-coupled chitosan
Tao Jiang, Bijay Singh, Hui-Shan Li et al. · 2013 · Biomaterials · 137 citations
Prevalence of intestinal pathogens in Danish finishing pig herds
Helle Stege, Tim Kåre Jensen, Kirsten Møller et al. · 2000 · Preventive Veterinary Medicine · 136 citations
Lincosamides, Streptogramins, Phenicols, and Pleuromutilins: Mode of Action and Mechanisms of Resistance
Štefan Schwarz, Jianzhong Shen, Kristina Kadlec et al. · 2016 · Cold Spring Harbor Perspectives in Medicine · 132 citations
Lincosamides, streptogramins, phenicols, and pleuromutilins (LSPPs) represent four structurally different classes of antimicrobial agents that inhibit bacterial protein synthesis by binding to part...
Reading Guide
Foundational Papers
Start with Hovind-Hougen et al. (1982; 222 citations) for spirochete morphology and cultivation; Pluske et al. (2002; 233 citations) for pig disease context; Lee and Hampson (1994; 127 citations) for genetic typing.
Recent Advances
Paukner and Riedl (2016; 194 citations) on pleuromutilin action; Schwarz et al. (2016; 132 citations) on resistance mechanisms; Bonardi (2017; 171 citations) for pork chain epidemiology.
Core Methods
Multilocus enzyme electrophoresis (Lee and Hampson, 1994); ribosomal sequencing for resistance (Pringle et al., 2004); prevalence surveys (Stege et al., 2000).
How PapersFlow Helps You Research Brachyspira Species in Intestinal Spirochetosis
Discover & Search
Research Agent uses searchPapers and citationGraph to map Brachyspira literature from Pluske et al. (2002; 233 citations), linking to resistance studies like Pringle et al. (2004). exaSearch uncovers zoonotic papers; findSimilarPapers expands from Hovind-Hougen et al. (1982) to pig-focused works.
Analyze & Verify
Analysis Agent applies readPaperContent to extract ribosomal mutation details from Pringle et al. (2004), with verifyResponse (CoVe) checking resistance claims against Stege et al. (2000). runPythonAnalysis performs statistical prevalence analysis from herd data; GRADE grading scores evidence on zoonotic risks.
Synthesize & Write
Synthesis Agent detects gaps in vaccine research post-Jiang et al. (2013), flagging contradictions in species virulence. Writing Agent uses latexEditText, latexSyncCitations for Brachyspira reviews, latexCompile for manuscripts, and exportMermaid for transmission diagrams.
Use Cases
"Analyze Brachyspira prevalence data across pig studies for statistical trends."
Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (pandas on Stege et al. 2000 data) → matplotlib prevalence plots and CSV export.
"Draft LaTeX review on Brachyspira antibiotic resistance mechanisms."
Synthesis Agent → gap detection → Writing Agent → latexEditText + latexSyncCitations (Pringle et al. 2004, Paukner 2016) → latexCompile → PDF output.
"Find code for Brachyspira genetic typing simulations."
Research Agent → paperExtractUrls (Lee and Hampson 1994) → Code Discovery → paperFindGithubRepo → githubRepoInspect → electrophoresis analysis scripts.
Automated Workflows
Deep Research workflow conducts systematic review of 50+ Brachyspira papers: searchPapers → citationGraph → GRADE grading → structured report on resistance. DeepScan applies 7-step analysis with CoVe checkpoints to verify zoonotic claims from Hovind-Hougen et al. (1982). Theorizer generates hypotheses on nutritional-disease links from Pluske et al. (2002).
Frequently Asked Questions
What defines intestinal spirochetosis by Brachyspira?
Intestinal spirochetosis features sigmoidal spirochetes 2-6 microns long attached to rectal epithelia, first characterized in humans by Brachyspira aalborgi (Hovind-Hougen et al., 1982; 222 citations).
What are key methods for Brachyspira research?
Multilocus enzyme electrophoresis types isolates (Lee and Hampson, 1994; 127 citations); DNA-DNA hybridization defines species like Serpulina intermedia (Stanton et al., 1997; 115 citations).
Which papers are most cited on Brachyspira?
Pluske et al. (2002; 233 citations) covers nutritional influences on pig enteric diseases; Hovind-Hougen et al. (1982; 222 citations) describes Brachyspira aalborgi morphology.
What are open problems in Brachyspira studies?
Ribosomal mutations drive tiamulin resistance (Pringle et al., 2004; 120 citations); gaps persist in zoonotic transmission dynamics and novel antibiotic targets.
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