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Dientamoebiasis

Dientamoebiasis, caused by the protozoan parasite Dientamoeba fragilis, is a prevalent intestinal infection with a broad spectrum of manifestations. Our company is at the forefront of developing innovative solutions to combat dientamoebiasis. Our services encompass a comprehensive range of preclinical research and development activities aimed at creating effective vaccines and therapeutics.

Overview of Dientamoebiasis

Dientamoebiasis is an intestinal infection caused by the protozoan parasite Dientamoeba fragilis, which inhabits the human gastrointestinal tract. This flagellated anaerobic organism has been recognized for over a century, yet its pathogenicity remains a subject of debate among researchers. D. fragilis is particularly prevalent in children and can present a spectrum of clinical manifestations ranging from asymptomatic carriage to gastrointestinal symptoms such as abdominal pain, diarrhea, and altered bowel movements. The epidemiological prevalence of D. fragilis varies widely, with studies reporting infection rates from 0.3% to as high as 52%, depending on the population and diagnostic methods used.

Pleomorphic trophozoites of Dientamoeba fragilis.Fig.1 Pleomorphic trophozoites of D. fragilis. (Stark D., et al., 2016)

Diagnostics Development for Dientamoebiasis

Accurate laboratory diagnostics are crucial for the effective management of Dientamoebiasis. Historically, light microscopy was the primary diagnostic method, but its sensitivity is limited. Advances in molecular techniques have revolutionized the detection of D. fragilis, with Real-Time Polymerase Chain Reaction (RT-PCR) emerging as a superior diagnostic tool. RT-PCR offers increased sensitivity and specificity, allowing for the accurate identification of D. fragilis even in low-parasitic loads.

For instance, studies have demonstrated that RT-PCR can achieve a sensitivity of up to 100%, significantly enhancing detection rates compared to traditional microscopy methods. This improvement is vital for differentiating between symptomatic and asymptomatic carriers, ultimately guiding treatment decisions. Moreover, the use of multiplex PCR assays can facilitate the simultaneous detection of multiple gastrointestinal pathogens, further streamlining the diagnostic process.

Therapeutics Development for Dientamoebiasis

Metronidazole

Metronidazole has been a longstanding therapeutic option for D. fragilis infections, with reported eradication rates ranging from 62.5% to 100%. However, its broad-spectrum activity raises concerns regarding potential side effects and resistance development.

Paromomycin

Paromomycin is an aminoglycoside antibiotic that has shown promise due to its high average eradication rate of approximately 84.9% in clinical studies. It is particularly advantageous due to its narrower spectrum of activity and fewer side effects compared to metronidazole.

Clioquinol

Clioquinol has also been employed in the treatment of Dientamoebiasis, demonstrating an average success rate of symptom resolution around 63.1%. Despite its historical use, the drug's availability has been inconsistent due to regulatory challenges in some regions.

Iodoquinol

Iodoquinol is another therapeutic agent noted for its effectiveness in small cohorts. While less frequently utilized, it has shown potential benefits in specific patient populations, particularly those who do not respond to first-line therapeutics.

Our Services

Our primary focus in vaccine development revolves around comprehending the immunogenicity of Dientamoeba fragilis and pinpointing potential antigens capable of triggering a protective immune response. To achieve this, we leverage state-of-the-art technologies like reverse vaccinology to craft vaccines that specifically target the parasite's distinctive proteins.

In addition, our dedication extends to the exploration and advancement of innovative therapeutics for dientamoebiasis. Our strategy encompasses the assessment of existing drugs for repurposing purposes, alongside the creation and synthesis of new compounds harboring promising anti-parasitic properties.

Disease Models

  • Dientamoeba fragilis Infection Mouse Models
  • Dientamoeba fragilis Infection Rat Models
  • Dientamoeba fragilis Infection Pig Models
  • Dientamoeba fragilis Infection Nonhuman Primate Models

Our preclinical research services begin with in vitro studies to assess the efficacy of potential vaccines and therapeutics against D. fragilis. We employ cell culture systems and molecular assays to evaluate the parasite's response to various interventions. If you are interested in our services, please feel free to contact us.

References

  1. Stark Damien, et al. "Dientamoeba fragilis, the neglected trichomonad of the human bowel." Clinical Microbiology Reviews 29.3 (2016): 553-580.
  2. van Kalleveen, Michael W., et al. "Dientamoeba fragilis in children: a systematic review on diagnostic considerations and efficacy of treatment." Expert Review of Gastroenterology & Hepatology 14.4 (2020): 231-242.
  3. Burgaña, Ander, et al. "Paromomycin is superior to metronidazole in Dientamoeba fragilis treatment." International Journal for Parasitology: Drugs and Drug Resistance 11 (2019): 95-100.

All of our services and products are intended for preclinical research use only and cannot be used to diagnose, treat or manage patients.