Study on intestinal parasitic infections and gut microbiota in cancer patients at a tertiary teaching hospital in Malaysia

Intestinal parasitic infections (IPIs) can lead to significant morbidity and mortality in cancer patients. While they are unlikely to cause severe disease and are self-limiting in healthy individuals, cancer patients are especially susceptible to opportunistic parasitic infections. The gut microbiot...

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Bibliographic Details
Published in:	Scientific reports Vol. 14; no. 1; pp. 13650 - 13
Main Authors:	Siti Farah Norasyikeen, Sidi Omar, Ngui, Romano, Syaza Zafirah, Ab Rahman, Md Zoqratt, Muhammad Zarul Hanifah, Eng, Wilhelm Wei Han, Ayub, Qasim, Amin Nordin, Syafinaz, Narcisse Mary Sither Joseph, Vesudian, Musa, Sabri, Lim, Yvonne Ai Lian
Format:	Journal Article
Language:	English
Published:	London Nature Publishing Group UK 13-06-2024 Nature Publishing Group Nature Portfolio
Subjects:	631/326/2565/2134 631/326/417 Adult Aged Anaerobic bacteria Bacteria Cancer Clostridiales Coinfection - epidemiology Coinfection - microbiology Cryptosporidium Cryptosporidium - genetics Cryptosporidium - isolation & purification Cyclospora Digestive system Entamoeba Entamoeba - genetics Entamoeba - isolation & purification Enterococcus Feces Feces - microbiology Feces - parasitology Female Gastrointestinal Microbiome Gastrointestinal tract Hospitals, Teaching Humanities and Social Sciences Humans Immunoregulation Infections Intestinal Diseases, Parasitic - epidemiology Intestinal microflora Intestinal parasites Intestine Malaysia - epidemiology Male Microbiota Microsporidia Microsporidia - isolation & purification Middle Aged Morbidity multidisciplinary Neoplasms - microbiology Parasites Patients Prevalence RNA, Ribosomal, 16S - genetics Science Science (multidisciplinary) Tertiary Care Centers Malaysia
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Summary:	Intestinal parasitic infections (IPIs) can lead to significant morbidity and mortality in cancer patients. While they are unlikely to cause severe disease and are self-limiting in healthy individuals, cancer patients are especially susceptible to opportunistic parasitic infections. The gut microbiota plays a crucial role in various aspects of health, including immune regulation and metabolic processes. Parasites occupy the same environment as bacteria in the gut. Recent research suggests intestinal parasites can disrupt the normal balance of the gut microbiota. However, there is limited understanding of this co-infection dynamic among cancer patients in Malaysia. A study was conducted to determine the prevalence and relationship between intestinal parasites and gut microbiota composition in cancer patients. Stool samples from 134 cancer patients undergoing active treatment or newly diagnosed were collected and examined for the presence of intestinal parasites and gut microbiota composition. The study also involved 17 healthy individuals for comparison and control. Sequencing with 16S RNA at the V3–V4 region was used to determine the gut microbial composition between infected and non-infected cancer patients and healthy control subjects. The overall prevalence of IPIs among cancer patients was found to be 32.8%. Microsporidia spp. Accounted for the highest percentage at 20.1%, followed by Entamoeba spp. (3.7%), Cryptosporidium spp. (3.0%), Cyclospora spp. (2.2%), and Ascaris lumbricoides (0.8%). None of the health control subjects tested positive for intestinal parasites. The sequencing data analysis revealed that the gut microbiota diversity and composition were significantly different in cancer patients than in healthy controls (p < 0.001). A significant dissimilarity was observed in the bacterial composition between parasite-infected and non-infected patients based on Bray–Curtis (p = 0.041) and Jaccard (p = 0.021) measurements. Bacteria from the genus Enterococcus were enriched in the parasite-infected groups, while Faecalibacterium prausnitzii reduced compared to non-infected and control groups. Further analysis between different IPIs and non-infected individuals demonstrated a noteworthy variation in Entamoeba -infected (unweighted UniFrac: p = 0.008), Cryptosporidium -infected (Bray–Curtis: p = 0.034) and microsporidia-infected (unweighted: p = 0.026; weighted: p = 0.019; Jaccard: p = 0.031) samples. No significant dissimilarity was observed between Cyclospora -infected groups and non-infected groups. Specifically, patients infected with Cryptosporidium and Entamoeba showed increased obligate anaerobic bacteria. Clostridiales were enriched with Entamoeba infections, whereas those from Coriobacteriales decreased. Bacteroidales and Clostridium were found in higher abundance in the gut microbiota with Cryptosporidium infection, while Bacillales decreased. Additionally, bacteria from the genus Enterococcus were enriched in microsporidia-infected patients. In contrast, bacteria from the Clostridiales order, Faecalibacterium , Parabacteroides , Collinsella , Ruminococcus , and Sporosarcina decreased compared to the non-infected groups. These findings underscore the importance of understanding and managing the interactions between intestinal parasites and gut microbiota for improved outcomes in cancer patients.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2045-2322 2045-2322
DOI:	10.1038/s41598-024-59969-6