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Home»Science»New way to detect intestinal infection
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New way to detect intestinal infection

November 15, 2024No Comments4 Mins Read
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Researchers develop a groundbreaking metabarcoding technique to simultaneously detect multiple intestinal parasites, paving the way for improved diagnosis and control of these persistent infections.

Intestinal parasitic infections pose a significant global health concern, affecting millions of people worldwide. Researchers have now developed a groundbreaking technique called metabarcoding that can simultaneously detect and identify multiple intestinal parasite species in a single sample. This innovative approach, detailed in a recent study, offers a transformative solution for rapid and accurate diagnosis, ultimately aiding efforts to control and prevent these insidious infections.

The study’s findings shed light on the factors influencing the efficiency of this metabarcoding technique, paving the way for improved diagnostic methods and enhanced public health outcomes.

Unraveling the Complexity of Intestinal Parasites

Intestinal parasites, including helminths (such as roundworms, flatworms, and tapeworms) and protozoa (like Giardia and Entamoeba histolytica), pose a significant threat to public health. These parasites can lead to severe morbidity, malnutrition, and even mortality, particularly in marginalized communities with limited access to clean water and sanitation facilities.

Advancing Diagnostic Capabilities

Conventional methods for parasite detection, such as microscopic examination, polymerase chain reaction (PCR), and enzyme-linked immunosorbent assay (ELISA), have their limitations. These techniques can be time-consuming, labor-intensive, and may not always provide accurate results, especially when dealing with low-level infections or multiple parasite species.

figure 1
Fig. 1

Metabarcoding: A Transformative Approach

To address these challenges, the researchers in this study leveraged the power of metabarcoding, a cutting-edge molecular technique that enables the simultaneous screening of multiple parasite species within a single sample. By targeting the 18S ribosomal RNA (rRNA) gene, the team was able to detect and identify 11 different intestinal parasite species using next-generation sequencing (NGS) technology.

figure 2

Fig. 2

Optimizing the Metabarcoding Process

The researchers investigated several factors that can influence the efficiency of the metabarcoding approach. They found that the DNA secondary structure of the 18S rRNA gene region, specifically the number of GC base pairs, had a significant impact on the sequencing output. Parasites with a higher number of GC base pairs in their DNA secondary structures tended to have lower read counts, suggesting that these regions may hinder the amplification and sequencing processes.

Additionally, the researchers explored the effect of annealing temperature during the amplicon PCR step. They observed that adjusting the annealing temperature could improve the detection of certain parasite species, such as Ascaris lumbricoides, Enterobius vermicularis, and Taenia saginata, which were initially detected in lower numbers.

Table 1 Next-generation sequencing output and the number of intra-GC pairs in the hairpin structure of the 18 S rDNA V9 region of 11 intestinal parasites.

Implications and Future Directions

The findings of this study have significant implications for the diagnosis and control of intestinal parasitic infections. By optimizing the metabarcoding approach, the researchers have paved the way for more accurate and comprehensive detection of these parasites, ultimately enhancing public health efforts.

The study also highlights the need for further research to address the limitations of current diagnostic methods. Strategies such as enzymatic removal of host DNA or the use of alternative target regions, like the ITS2 region or mitochondrial rRNA genes, may help overcome the masking effect of host DNA and improve the detection of low-abundance parasites.

As molecular diagnostics continue to evolve, the integration of metabarcoding techniques with other advanced methods, such as long-read sequencing, holds great promise for enhancing the accuracy and efficiency of parasite detection. These advancements will undoubtedly contribute to more effective control and prevention strategies, ultimately improving the health and well-being of populations affected by these persistent parasitic infections.

Author credit: This article is based on research by Dongjun Kang, Jun Ho Choi, Myungjun Kim, Sohyeon Yun, Singeun Oh, Myung-hee Yi, Tai-Soon Yong, Young Ah Lee, Myeong Heon Shin, Ju Yeong Kim.


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18S rRNA disease control intestinal parasites metabarcoding molecular diagnostics next-generation sequencing public health
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Tech enthusiast by profession, passionate blogger by choice. When I'm not immersed in the world of technology, you'll find me crafting and sharing content on this blog. Here, I explore my diverse interests and insights, turning my free time into an opportunity to connect with like-minded readers.

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