Intestinal Cavity Research Articles

11 cases of peritoneal dialysis catheter penetrating into the intestinal cavity: case series.

The penetration of a peritoneal dialysis catheter into the intestinal cavity is a clinically rare complication. In the present retrospective clinical case series, 11 patients with uraemia who received continuous ambulatory peritoneal dialysis and attended hospital between 2019 and 2023 are described. The median patient age was 61.91 ± 11.33 years. All patients had previously experienced peritoneal dialysis-related peritonitis and were clinically cured by infusing sensitive antibiotics into the abdominal cavity. Colonoscopy was utilised to locate the penetrating catheter and close the perforation with a titanium clip once the catheter had been removed via an external approach. Following a 2-4-week fast, the perforations healed in all 11 patients. The present authors' experience illustrates that directly removing the catheter and clamping the perforation opening under the guidance of colonoscopy is simple to operate with few complications compared with traditional open surgery.

Hemoglobin Hydrolyzate Promotes Iron Absorption in the Small Intestine through Iron Binding Peptides.

Hemoglobin is an excellent source of iron supplements, and its hydrolyzate spontaneously binds iron during digestion and promotes iron absorption in vivo. However, the underlying mechanisms of what peptides bind and how they bind iron ions remain unclear. This study prepared the porcine hemoglobin hydrolyzate through enzymatic hydrolysis and acid treatment and investigated the mechanisms of hemoglobin hydrolyzate on iron absorption through the determination of iron levels in dietary intervention mice, iron binding site analyses, peptide digestion analyses, molecular simulation docking, and INT407 cell validation. The results showed that ingestion of the hemoglobin hydrolyzate diets increased iron levels in the blood of mice, accompanied by the upregulation of duodenal iron circulation-related genes such as ferritin, PCBP1, and HP. Carboxyl, imidazole groups, and aromatic amino acid residues were iron binding sites of hemoglobin hydrolyzate during digestion. VDEVGGEA and VDEVGGE were found to involve the spontaneous and efficient binding of hemoglobin hydrolyzate to iron ions in the intestinal cavity. In particular, the DEVGGE peptide was the typical sequence for hemoglobin hydrolytic peptides to exert iron binding activity.

DOP39 Constructing butyrate-producing yeast as a cell-dependent treatment option for Inflammatory Bowel Disease

Abstract Background Intestinal microbiota dysbiosis and metabolic disruption are essential characteristics of inflammatory bowel disorders (IBD). Butyrate has been proven to regulate immune response and gut microbiota. It has been confirmed that the butyrate content in the intestinal cavity of IBD patients decreases (Fig. 1A). Methods In this study, gene editing was used to reconstruct the butyrate synthesis pathway and regulate related metabolic pathways in Saccharomyces cerevisiae to produce butyrate and enrich its synthesis in anaerobic environments to cope with complex intestinal conditions. A series of engineered strains were co-cultured with gut microbiota samples from six patients with mild-to-moderate ulcerative colitis and 16S ribosomal RNA sequencing was used to analyze the regulatory effect of engineered strains on intestinal microbiota in vitro. The TNBS-induced IBD mice model was used to explore the protective effect of butyrate-engineered yeasts in vivo. Results A series of engineered strains with different butyrate synthesis abilities was constructed to meet the needs of different patients. S. cerevisiae was engineered by introducing an exogenous butyrate synthesis pathway and regulating yeast metabolism to increase the availability of the precursors. Engineered yeast can produce up to 1.8 g/L butyrate (Fig. 1B). The modification of related metabolic pathways also focused on enhancing the synthesis of butyrate under anaerobic conditions to enable engineered yeasts to adapt to the intestinal environment. This series of engineered yeasts with different butyrate synthesis abilities regulated the intestinal microbiota of IBD patients to varying degrees, enhancing the abundance of related probiotics such as Lactobacillus and Bifidobacterium and reducing the abundance of harmful bacteria like Candidatus Bacilloplasma (Fig. 1C). Meanwhile, strains improved TNBS-induced colitis in mice by restoring butyrate content. Remarkably, the engineered strain with the second-highest butyrate yield showed the most significant therapeutic effect (Fig. 1D). Conclusion This study realized butyrate synthesis in S. cerevisiae and regulated related metabolic modules to adjust the butyrate production to achieve the best therapeutic effect on colitis in vivo and in vitro. In addition, the strain with the second-highest butyrate production has the best therapeutic effect. This highlights the dual role of butyrate in epithelial cell repair and suggests a therapeutic window for IBD treatment through butyrate supplementation. Selecting the most suitable strain for each patient's condition is essential for restoring butyrate levels, regulating microbiota, and promoting mucosal repair.

The white grunt, Haemulon plumierii (Lacepède, 1801) as paratenic and definitive host of two acanthocephalan species, with the description of a new species of Dollfusentis (Palaeacanthocephala: Leptohynchoididae) from the Yucatán Peninsula, Mexico.

Acanthocephalans are a group of obligate endoparasites that alternate between vertebrates and invertebrates to complete their life cycles. Occasionally, the same individual host acts as a definitive or paratenic host for different acanthocephalan species. In this study, acanthocephalans were sampled in marine fish in three localities of the Yucatán Peninsula; adults and cystacanths were recovered from the intestine and body cavity, respectively, of Haemulon plumierii from off the coast of Sisal, Yucatán. Ribosomal DNA sequences (small and large subunits) were used to test the phylogenetic position of the species of the genus Dollfusentis, whereas the mtDNA gene cox 1 was used for assessing species delimitation. The cox 1 analysis revealed an independent genetic lineage, which is recognized herein as a new species, Dollfusentis mayae n. sp. The new species is morphologically distinguished from the other six congeners by having a cylindrical proboscis armed with 22-25 longitudinal rows bearing 12 hooks each. The cystacanths were morphologically identified as Gorgorhynchus medius by having a cylindrical trunk covered with tiny irregular spines on the anterior region, and a cylindrical proboscis armed with 17-18 longitudinal rows of 21 hooks each; small and large subunit phylogenetic analyses yielded G. medius within the family Isthomosacanthidae, suggesting that Gorgorhynchus should be transferred to this family from Rhadinorhynchidae where it is currently allocated.

Underwater versus conventional endoscopic mucosal resection for colorectal lesions: An updated meta-analysis of randomized controlled trials.

Background and study aims Colorectal malignancy is a leading cause of death. Conventional endoscopic mucosal resection (CEMR) is a strategy used to resect precancerous lesions that involves injecting fluid beneath a polyp to create a gap for resection. Underwater endoscopic mucosal resection (UEMR) is a newer method that forgoes injection, instead filling the intestinal cavity with water to facilitate polyp resection. Our aim was to compare the safety and efficacy of these approaches by synthesizing the most contemporary evidence. Methods PubMed, Embase, and Cochrane libraries were searched from inception through November 11, 2022 for randomized controlled trials (RCTs) comparing UEMR and CEMR for resection of colorectal lesions. The primary outcome was the rate of en bloc resection and secondary outcomes included recurrence, procedure time, and adverse events (AEs). Results A total of 2539 studies were identified through our systematic literature search. After screening, seven RCTs with a total of 1581 polyps were included. UEMR was associated with significantly increased rates of en bloc resection (RR 1.18 [1.03, 1.35]; I 2 = 76.6%) versus conventional approaches. No significant differences were found in procedure time, recurrence, or AEs. Conclusions UEMR is a promising effective technique for removal of colorectal lesions. The most contemporary literature indicates that it improves en bloc resection rate without increasing procedure time, recurrence, or AEs (PROSPERO ID CRD42022374935).

Ultrasound diagnosis of the small intestinal adenomyoma in children.

Adenomyoma is an exceptionally rare hamartoma in the small intestine. Few data have been reported on the featuresof this rare disease. The aim of this study was to describe the ultrasound (US) characteristics of small intestinal adenomyomas.Material and methods: This retrospective study analyzed the clinical features and US data of 15 pediatric patients diagnosedas small intestinal adenomyomas in the age range between 1 day to 12 years in our hospital during 2014-2021. Theclinical manifestations of all the small intestinal adenomyomas were abdominal pain, vomiting or/and hemafecia. The smallintestinal adenomyoma usually acted as the lead point of secondary intussusception. They were identified in the ileum (n=11),jejunum (n=2), and Meckel's diverticulum (n=2). The diagnostic accuracy (the concordance rate between US diagnosis andpathological diagnosis) of small intestinal adenomyoma was 73.3%. The small intestinal adenomyoma had approximately1.0-3.0 cm, were typically located in the submucosal region, had the basal part wide and without a pedicle, and its boundarieswere clear. The mass protruded into the intestinal cavity, and showed oval hypoechoic polycystic echo nodules, containingmultiple small quasi-circular or irregular cysts of different sizes surrounded by solid hypoechoic mosaic areas. The colorDoppler US showed in the solid hypoechoic areas of the mass abundant or sparse blood flow signals.Conclusions The USfindings of small intestinal adenomyomas in children are characteristic, and US is valuable in the identification of intestinaladenomyomas in children.

Bifidobacteria in disease: from head to toe.

Bifidobacteria as a strictly anaerobic gram-positive bacteria, is widely distributed in the intestine, vagina and oral cavity, and is one of the first gut flora to colonize the early stages of life. Intestinal flora is closely related to health, and dysbiosis of intestinal flora, especially Bifidobacteria, has been found in a variety of diseases. Numerous studies have shown that in addition to maintaining intestinal homeostasis, Bifidobacteria may be involved in diseases covering all parts of the body, including the nervous system, respiratory system, genitourinary system and so on. This review collects evidence for the variation of Bifidobacteria in typical diseases among various systems, provides mild and effective therapeutic options for those diseases that are difficult to cure, and moves Bifidobacteria from basic research to further clinical applications.

ENTEROPATHIES WITH PROTEIN LOSS

Protein-losing enteropathy (PLE) is considered one of the rare and complex complications of intestinal diseases. The main symptom of this pathology is the formation of hypoproteinemic edema. Diagnosis of the disease is based on the verification of protein loss in the intestinal cavity through the determination of α1-antitrypsin in feces. The damaged segment of the intestine is determined by X-ray and endoscopic diagnostic methods. The mainstay of treatment is a low-fat diet rich in medium-chain triglycerides. In cases of severe hypoproteinemias that do not respond to medi cal treatment, the choice is surgical treatment - resection of the damaged segment.

Radiation makes cells select the form of death dependent on external or internal exposure: apoptosis or pyroptosis

Internal radiation exposure from neutron-induced radioisotopes environmentally activated following atomic bombing or nuclear accidents should be considered for a complete picture of pathologic effects on survivors. Acute and localized high dose radiation exposure from hot particles taken into the body must induce cell death and severe damage to tissues, whether they are proliferating or not. However, very little the cellular and molecular mechanisms underlying this internal radiation pathology has been investigated. Male Wistar rats were internally exposed to 56MnO2 powder by inhalation. Small intestine samples were investigated by histological staining at acute phase (6 h, 3 days and 14 days) and late phase (2, 6 and 8 months) after the exposure. Histological location and chemical properties of the hot particles embedded in small intestinal tissues were analyzed by synchrotron radiation—X-ray fluorescence—X-ray absorption near-edge structure (SR–XRF–XANES). Hot particles located in the intestinal cavity were identified as accumulations of Mn and iron. Pathological changes showed evidence of crypt shortening, massive cell death at the position of stem cell zone, including apoptosis and pyroptosis from 6 h through 8 months in the internal exposed rats.

Features of the microscopic structure of the intestinal wall in females of the ixodic tick of the genus Dermacentor during the feeding period

Ixodic ticks of the genus Dermacentor are parasitomorphic ticks that are carriers of a number of dangerous zooanthropozonoses, have a wide distribution. The intestine of an adult contains several types of cells: digesting, secretory, reserve and yolk cells. Digestive cells of types 1 and 2 are involved in the process of intracellular digestion and are the main components of the wall of the middle intestine. After insemination, yolk cells begin to form in the intestine, regulating the development of oocytes. The research was carried out on the basis of the Department of Parasitology and Veterinary and Sanitary Examination, Anatomy and Pathanatomy named after Prof. S. N. Nikolsky and at the Scientific Diagnostic and Therapeutic Veterinary Center of the Stavropol State Agrarian University, as well as on the basis of veterinary clinics of IP Zaichenko "Veterinary Center named after Pirogova". The object of the study was ixode mites, the material for the study was the digestive system of females, in particular the middle part of the intestine. Macroscopic examination of the nourished females of the Dermacentor tick helped to reveal that the intestine is an unpaired tubular organ divided into three sections: the esophagus, the sac-like meatus and the small intestine. With the arrival of blood, the intestine expands, as a result of which reserve cells begin to grow and differentiate into primary digestive ones. By the time egg laying begins, digestive cells of type I degenerate and are replaced by digestive cells of type II, differentiated from reserve cells. In nourished females, with an active process of vitellogenesis, the presence of specialized yolk cells is noted. Thus, with the beginning of the feeding period in ixodic mites, an increase in the intestine occurs due to the asynchronous development of digestive cells of type I and II. During digestion, secretory cells are focally exfoliated into the intestinal cavity filled with the host's blood, which characterizes the acceleration of the process of erythrocyte hemolysis. In the final phase of digestion, and the beginning of the vitellogenesis process, yolk cells are formed that regulate the development of oocytes.

The regulatory role of bile acid microbiota in the progression of liver cirrhosis.

Bile acids (BAs) are synthesized in liver tissue from cholesterol and are an important endocrine regulator and signaling molecule in the liver and intestine. It maintains BAs homeostasis, and the integrity of intestinal barrier function, and regulates enterohepatic circulation in vivo by modulating farnesoid X receptors (FXR) and membrane receptors. Cirrhosis and its associated complications can lead to changes in the composition of intestinal micro-ecosystem, resulting in dysbiosis of the intestinal microbiota. These changes may be related to the altered composition of BAs. The BAs transported to the intestinal cavity through the enterohepatic circulation are hydrolyzed and oxidized by intestinal microorganisms, resulting in changes in their physicochemical properties, which can also lead to dysbiosis of intestinal microbiota and overgrowth of pathogenic bacteria, induction of inflammation, and damage to the intestinal barrier, thus aggravating the progression of cirrhosis. In this paper, we review the discussion of BAs synthesis pathway and signal transduction, the bidirectional regulation of bile acids and intestinal microbiota, and further explore the role of reduced total bile acid concentration and dysregulated intestinal microbiota ratio in the development of cirrhosis, in order to provide a new theoretical basis for the clinical treatment of cirrhosis and its complications.

First Record of the Parasitic Nematode Anisakis simplex in the Intestine and Gonads of Dentex macrophthamus off Syrian Marine Waters

This study aimed to investigate the infection of internal parasites of Dentex macrophthalmus in Syrian marine coastal waters. A total of 409 individuals were collected from Ras Al-Basit in the north to Tartus in the south, from the following research stations: Ras Al-Basit, different areas along the Lattakia beach, Jableh, and Tartous, during the period from January 2019 to December 2020.
 The internal organs (stomach, intestine, and body cavity) of all fish specimens were examined to detect infection with internal parasites. The third-stage larvae of the parasite Anisakis simplex, which belongs to the nematode worms, was isolated from the stomach and gonad walls of D. macrophthalmus. The number of fish infected with this worm reached 53 out of 409 fish individuals studied, with an infection rate of 12.96% and an infection intensity of 2.70 parasites per fish.
 This study represents the first record of Anisakis simplex isolated from the abdominal cavity of D. macrophthalmus in Syrian marine waters.

Role of Manganese in Calcium Metabolism at the Level of the Enteral and Internal Environment of the Body

The authors studied the effect of manganese on calcium metabolism at the level of the enteral and internal environment of the body in an experiment on rabbits. Two groups (control and experimental) of rabbits selected by the paired-analysis method were used in the experiment. There were three animals in each group. The animals in the experimental group were given a diet containing three times the amount of manganese. At the end of the experiment, blood was collected from various parts of the digestive tract of all animals under general anaesthesia. Organs and tissues werecollected for analysis after control slaughter, and the intestines were removed, followed by sampling of chyme and mucosa from the walls of various sections. The chyme was separated into fractions using the developed method. The concentration of manganese and calcium in intestinal chyme and its fractions, in mucosa of the intestinal wall, in the blood flowing in and out of the digestive tract, in organs and tissues was determined by the atomic absorption spectrophotometry method. It was shown experimentally that when the concentration of manganese in the diet of rabbits was tripled, the element was not accumulated in the internal environment but was accumulated by endogenous structures of the chyme and the mucous membrane of the wall of the small and large intestines. A metabolic change in calcium metabolism was revealed when manganese was tripled in the diet: its concentrations in the blood flowing from the intestines and in the mucous layer of the small intestine wall decreased. As a result, there was a significant decrease in bone concentrations and a downward trend in liver and kidney concentrations. The antagonistic effect of manganese on calcium metabolism in the enteric and internal environment is concluded. In the interaction of elements, the leading role of endogenous structures of chyme is noted due to ion-exchange properties of glycoproteins of intestinal cavity mucosa.

Novel Sophoridine Derivatives as Potential Larvicidal Agents against Aedes albopictus: Synthesis, Biological Evaluation, Acetylcholinesterase Inhibition, and Morphological Study.

Two series of novel sophoridine derivatives were designed, synthesized, and evaluated for their anti-mosquito activity. SOP-2g, SOP-2q, and SOP-2r exhibited potential larvicidal activity against Aedes albopictus larva with LC50 values of 330.98, 430.53, and 411.09 ppm, respectively. Analysis of structure-activity relationships indicated that the oxime ester group was beneficial for improving the larvicidal biological activity, whereas the long-chain aliphatic group and fused-ring group were introduced. Furthermore, the larvicidal mechanism was also investigated based on the inhibition assay of acetylcholinesterase (AChE) and the morphological observation of dead larva treated with derivatives. Results indicated that the AChE inhibitory activity of the preferred three derivatives were 63.16%, 46.67%, and 35.11%, respectively, at 250 ppm concentration. Additionally, morphological evidence demonstrated that SOP-2q and SOP-2r induced changes in the larva's intestinal cavity, caudal gill, and tail, thereby displaying larvicidal action against Ae. albopictus together with AChE inhibition. Therefore, this study implied that sophoridine and its novel derivatives could be used to control the population of mosquito larva, which may also be effective alkaloids to reduce the mosquito population density.

Bacterial Sialic Acid Catabolism at the Host–Microbe Interface

Sialic acids consist of nine-carbon keto sugars that are commonly found at the terminal end of mucins. This positional feature of sialic acids contributes to host cell interactions but is also exploited by some pathogenic bacteria in evasion of host immune system. Moreover, many commensals and pathogens use sialic acids as an alternative energy source to survive within the mucus-covered host environments, such as the intestine, vagina, and oral cavity. Among the various biological events mediated by sialic acids, this review will focus on the processes necessary for the catabolic utilization of sialic acid in bacteria. First of all, transportation of sialic acid should be preceded before its catabolism. There are four types of transporters that are used for sialic acid uptake; the major facilitator superfamily (MFS), the tripartite ATP-independent periplasmic C4-dicarboxilate (TRAP) multicomponent transport system, the ATP binding cassette (ABC) transporter, and the sodium solute symporter (SSS). After being moved by these transporters, sialic acid is degraded into an intermediate of glycolysis through the well-conserved catabolic pathway. The genes encoding the catabolic enzymes and transporters are clustered into an operon(s), and their expression is tightly controlled by specific transcriptional regulators. In addition to these mechanisms, we will cover some researches about sialic acid utilization by oral pathogens.

Evaluation of BMI-based tube voltage selection in CT colonography: A prospective comparison of low kV versus routine 120kV protocol.

To explore the value of individualized kVp selection based on the patient's body mass index (BMI, kg/m2 ) in CT colonography (CTC). Seventy-eight patients underwent two CTC scans: conventional 120kVp in supine position (Group A) with 30% Adaptive statistical iteration algorithm (ASIR-V) and BMI-based lower kV p in prone position (Group B): tube voltage was suggested by an experienced investigator according to the patient's body mass index (BMI; calculated as weight divided by height squared; kg/m (2)).70kV for BMI<23kg/m2 (Group B1, n=27), 80kV for 23≤BMI≤25kg/m2 (Group B2, n=21) and 100kV for BMI>25kg/m2 (Group B3, n=30). Group A, corresponding to the BMI value in Group B, was divided into A1, A2, and A3 subgroups for analysis. Groups B used ASIR-V of different weights (30%-90% ASIR-V). The Hounsfield Unit (HU) and SD values of the muscles and the intestinal cavity air were measured, and the signal-to-noise ratio (SNR) and the contrast-to-noise ratio (CNR) of images were calculated. Imaging quality was evaluated by two reviewers and statistically compared. The 120kV scans were preferred more than 50% of the time. All images had excellent quality with good consistency between reviewers (Kappa>0.75, p<0.05). The radiation dose was reduced in groups B1, B2 and B3 by 63.62%, 44.63%, and 32.14%, respectively, compared with group A (p<0.05). The SNR and CNR values between group A1/A2/A3 and B1/B2/B3+60%ASIR-V were not statistically significant (p<0.05). There was no statistically significant difference between the subjective scores of group B combined with 60%ASIR-V and group A (p>0.05). BMI-based individualized kV CTC imaging significantly reduces overall radiation dose while providing an equal image quality with the conventional 120kV.

Study the percentage of infection with intestinal parasites in dogs in salahaldin prevence

The study examined 137 stray dogs from both sexes and aged 3 months - 3 years old, included 127 stray dogs and 10 dogs clinically normal, served as a control group. Clinical signs were observed, the percentage of infection with intestinal parasites was 49.60%, was diagnosed with worms Toxocara canis 32.28%, Toxascaris leonine 25.19%, and Taenia pisiformis 27.55%, and Moniezia sp. 37.79%, and Dipylidium caninum 19.68%, and Diphyllobothrium sp. 24.40% and oocysts each of Isospora spp. 13.38%, and Cryptosporidium spp. 16.53%. histopathological examination of the intestines showed transformation the columnor epithelial cells to the spherical or semi-spherical shape and also alienation the villi in the intestinal cavity, with the infilteration of large numbers of inflammatory white blood cells inside the core of the villi also appeared in the lamina propria, agreat number of lymphocytes inflammatory cells with appearance of parasitic spherical cystic structures of worm Toxocara canis in the submucosal layer and between fibers of smooth muscle

Histopathological effects resulting from infection stray cats by intestinal parasites in Saladin province

In this, study89stray cats were examined in Saladin province, of both sexes and various ages, which included 82 stray cats and 7 cats as a group control. Showed the infected cats number" of clinical examination and stood infection rate of intestinal parasites 41.46%, was diagnosed with worms Toxocara cati by 8.53%, Toxascaris leonine by 13.41%, and Taenia spp. by 31.70%, and Dipylidium caninum by 15.85%, and Diphyllobothrium sp. by 7.31% and eggs bags each of Isospora spp. by 20.73%, and Giardia spp. 6.09% and Toxoplasma gondii by 10.97%. Histopathological examination of the intestines, showed degeneration of columnar epithelial cells and necrosis of some of them and also alienations, the villi in the intestinal cavity, with the presence of large numbers of inflammatory white blood cells within the core of the villi, and the muscular wall of the intestines contained inflammatory cells severe macular disintegration with severe degeneration in many fiber other muscle, as large vacuole appeared in the cytoplasm of the muscle fibers.

Clinical effect of standardized nursing for lymphoma patients and the influencing factors of nosocomial infection.

To analyze the clinical effect of standardized nursing for lymphoma patients and the influencing factors of nosocomial infection, a total of 360 diffuse large B-cell lymphoma patients with disease recurrence or progression after first-line treatment were retrospectively selected from our hospital from January 2021 to July 2022. After standardized nursing, the overall infection rate of lymphoma patients was 2.50% (9/360), which was significantly lower than the overall infection rate of our hospital in 2021 (7.44%, 844/11342) (P < .05). The proportion of 3 kinds of pathogenic bacteria detected were G+ bacteria (33.5%), G- bacteria (53.3%), and fungi (13.2%). The pathogenic bacteria genus with the most G+ bacteria is Enterococcus, the pathogenic bacteria genus with the most G+ bacteria is Enterobacteriaceae, and the pathogenic bacteria with the most fungi is Candida albicans. Female infection rate was significantly higher than male (P < .05). There was no significant difference in nosocomial infection among different marital status/fertility status (P > .05). The nosocomial infection of patients with different hospitalization times was statistically significant (P < .05). The duration of hospitalization in the infected group was significantly higher than that in the non-infected group (P < .05). The clinical effect of standardized nursing for lymphoma patients is significant, and the influencing factors of nosocomial infection include patient gender, hospitalization frequency, and hospitalization duration.

Nematodes and acanthocephalans of hygienic-sanitary importance parasitizing Hyporthodus niveatus (Valenciennes, 1828) (Actinopterygii) collected from fish markets of the municipality of Niterói, RJ, Brazil

Hyporthodus niveatus is an appreciated and valuable commercial fish species in the municipality of Niterói, state of Rio de Janeiro, Brazil, due its excellent quality flesh. The constant presence of helminths in the abdominal musculature, viscera and serosa of individuals of the species has been the subject of complaints among local fish traders because of economic losses due to their repugnant aspect. Considering their hygienic-sanitary importance and significance for collective health, the presence of helminths was investigated in 20 individual fish of H. niveatus purchased from fish markets in the municipality of Niterói in 2021-2022. Nematodes, identified as third-instar larvae of Contracaecum sp., Terranova sp., Hysterothylacium deardorffoverstreetorum and Raphidascaris sp., were found parasitizing the intestine and abdominal cavity. Acanthocephalans, identified as juveniles of Corynosoma australe, were found parasitizing the intestine. The highest parasitic indices were for H. deardorffoverstreetorum, with prevalence of 30%, mean intensity of 1.5, mean abundance of 0.45 and infection ranges of 1-2. Considerations about the zoonotic potential and hygienic-sanitary significance of these parasites are presented in order to increase food safety for consumers.