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Current Allergy and Asthma Reports Jul 2023Helminth infections modify the natural history of allergic diseases, by either decreasing or increasing their symptoms. Several helminth components are involved in the... (Review)
Review
PURPOSE OF REVIEW
Helminth infections modify the natural history of allergic diseases, by either decreasing or increasing their symptoms. Several helminth components are involved in the increasing of the allergic response and symptoms, overcoming the concomitant immunosuppression of helminthiases. However, the role of individual IgE-binding molecules in this process remains to be defined.
RECENT FINDINGS
We updated the list of helminth allergens and IgE-binding molecules, their effects on asthma presentation, and their impact on allergy diagnosis. Data from genetic and epigenetic studies of ascariasis are analyzed. A new species-specific A. lumbricoides allergen has been discovered, with potential use in molecular diagnosis. Most helminth IgE-binding components are not officially classified as allergens in the WHO/IUIS database, although there is evidence of their influence increasing allergic manifestations. Further immunological characterization of these components is needed to better understand their mechanisms of action and evaluate the ways in which they can influence the diagnosis of allergy.
Topics: Animals; Humans; Allergens; Parasites; Immunoglobulin E; Hypersensitivity; Asthma
PubMed: 37269427
DOI: 10.1007/s11882-023-01089-8 -
Parasites, Hosts and Diseases May 2023Ascaris lumbricoides causes one of the most common soil-transmitted helminthiases globally. The worms mostly infect the human small intestine and elicit negligible or...
Ascaris lumbricoides causes one of the most common soil-transmitted helminthiases globally. The worms mostly infect the human small intestine and elicit negligible or nonspecific symptoms, but there are reports of extraintestinal ectopic ascariasis. We describe a rare case of biliary ascariasis mistaken for biliary stent in a 72-year-old female patient with a history of liver resection. She visited our outpatient clinic complaining of right upper quadrant pain and fever for the past week. She had previously undergone left lateral sectionectomy for recurrent biliary and intrahepatic duct stones 2 years ago. Besides mildly elevated gamma-glutamyl transferase levels, her liver function tests were normal. Magnetic resonance cholangiopancreatography revealed a linear filling defect closely resembling an internal stent from the common bile duct to the right intrahepatic bile duct. A live female A. lumbricoides adult worm was removed by endoscopic retrograde cholangiopancreatography (ERCP). Despite a significant decrease of the ascariasis prevalence in Korea, cases of biliary ascariasis are still occasionally reported. In this study, a additional case of biliary ascariasis, which was radiologically misdiagnosed as the biliary stent, was described in a hepatic resection patient by the worm recovery with ERCP in Korea.
Topics: Humans; Adult; Animals; Female; Aged; Ascariasis; Biliary Tract Diseases; Ascaris lumbricoides; Liver; Stents
PubMed: 37258266
DOI: 10.3347/PHD.23012 -
Parasites, Hosts and Diseases May 2023In the l950s, under the legacy of traditional agriculture, Ascaris lumbricoides, spread epidemically in the war-bitten society of Korea. Consensus on the parasite... (Review)
Review
In the l950s, under the legacy of traditional agriculture, Ascaris lumbricoides, spread epidemically in the war-bitten society of Korea. Consensus on the parasite control was drafted in the Parasite Disease Prevention Act, which passed a parliamentary agreement in 1966, and established safe disposal of feces and mass chemotherapy as control strategies. Biannual stool examinations and treating infected schoolchildren were basic scheme of the control activity through which revenue could be secured for organized business. In the 27 years following 1969, a maximum of 16 million stool examinations had been done every year. Cellophane thick smear enabled the task. The infection declined remarkably in the 1970s when industrialization and green revolution proceeded. A population study of A. lumbricoides in the late 1970s helped us better understand its epidemiology. The data also settled down the understandable protest of teachers against the repeated stool examinations. In the 9 years following 1987, the target population was gradually reduced when the egg positive rate was below 0.1%. An article in the Korean Law, stipulating obligatory stool examinations, was made optional. Although the long-term Korean effort of Ascaris control was a success, the effect of mass chemotherapy was not as succinct in terms of lowering reinfection. In the period of control, Korean agricultural technology changed, and the economy grew and supplied sanitary facilities by which the vicious cycle was disconnected. Reduction of morbidity was a benefit of mass chemotherapy, which is the only control method feasible in economically difficult countries. The most important hurdle of parasite control in the 1960s was poverty of general population and limited financial resources in Korea but the society formed a consensus on the priority of intestinal helminthiasis control during the ordeal period. The national consensus in the 1960s was the critical milestone for Ascaris control in Korea. Under the social agreement, application of timely technical and research advancements in parasitology achieved the success of ascariasis elimination. The successful experience of ascariasis elimination in Korea can be a benchmark for countries where neglected tropical diseases are endemically recycled.
Topics: Animals; Humans; Child; Ascariasis; Helminthiasis; Intestinal Diseases, Parasitic; Ascaris; Republic of Korea
PubMed: 37258258
DOI: 10.3347/PHD.22152 -
Annals of Clinical Microbiology and... May 2023Curvularia hawaiiensis (formerly Bipolaris hawaiiensis) is a plant pathogen often isolated from soil and vegetative material. However, only a few cases of opportunistic...
Necrotising pneumonia caused by Curvularia hawaiiensis (syn. Bipolaris hawaiiensis) and Mycobacterium tuberculosis coinfection in a patient with ascariasis: a case report and review.
INTRODUCTION
Curvularia hawaiiensis (formerly Bipolaris hawaiiensis) is a plant pathogen often isolated from soil and vegetative material. However, only a few cases of opportunistic invasive infections in humans have been described.
CASE
A 16-year-old female patient without comorbidities was admitted to the emergency department because of fever and chest pain. We described the first coinfection of Curvularia hawaiiensis and Mycobacterium tuberculosis necrotising pneumonia.
DISCUSSION
Multiple infections can alter immune responses. However, immunosuppression is the most critical risk factor for infection with species of the genus Curvularia. Therefore, it is crucial to carefully examine patients with tuberculosis, as they may rarely be coinfected with unusual fungi.
Topics: Humans; Adolescent; Curvularia; Mycobacterium tuberculosis; Pneumonia, Necrotizing; Ascariasis; Coinfection
PubMed: 37179313
DOI: 10.1186/s12941-023-00593-z -
International Journal of Surgery Case... Apr 2023Ascariasis is a helminthic infection of humans caused by Ascaris lumbricoides. Pediatric patients infected with Ascaris can develop multiple complications including...
INTRODUCTION AND IMPORTANCE
Ascariasis is a helminthic infection of humans caused by Ascaris lumbricoides. Pediatric patients infected with Ascaris can develop multiple complications including appendicitis, gastrointestinal bleeding, hepatobiliary disease like cholangitis or obstructive jaundice, intussusception, and bowel obstruction among others. Ascaris is a rare cause of intestinal perforation even in endemic areas.
CASE PRESENTATION
A 2-year-old female Ethiopian toddler who was presented with a complaint of non-bilious, non-projectile vomiting of 06 days duration, about two-three episodes per day. Associated with this she had had progressive abdominal distension, intermittent abdominal cramps and loss of appetite. On examination, she was acutely sick looking. She had signs of dehydration. Subsequently, she was resuscitated, broad spectrum antibiotic started and operated. Finally, the child was discharged improved after 7 days of hospital stay.
CLINICAL DISCUSSION
The clinical presentation of ascariasis can vary from asymptomatic child to one with severe disease requiring surgical intervention like our patient. Severity of disease depends on the worm burden; heavy worm infestation produces a wide range of acute abdominal complications such as intestinal obstruction, intussusception, cholangiohepatitis, pancreatitis, and acute appendicitis. Intestinal ascariasis rarely causes volvulus and intestinal gangrene, perforation and peritonitis.
CONCLUSION
Ascariasis must be considered in the differential diagnosis in patients presented with peritonitis especially those living or from temperate and tropical countries with a history of passage of worms. Ileum perforation is possible in patients with ascariasis due to pressing directly into the bowel wall, inflammatory reaction, or volvulus and intestinal wall necrosis.
PubMed: 37015161
DOI: 10.1016/j.ijscr.2023.108097 -
The Journal of Nutritional Biochemistry Jun 2023Polyphenols are a class of bioactive plant compounds with health-promoting properties, however, the interactions between polyphenols and pathogen infection and their...
Polyphenols are a class of bioactive plant compounds with health-promoting properties, however, the interactions between polyphenols and pathogen infection and their cumulative impact on inflammation and metabolic health are not well understood. Here, we investigated if a subclinical parasitic infection modulates the hepatic response to dietary polyphenol supplementation in a porcine model. Pigs were fed a diet with or without 1% grape proanthocyanidins (PAC) for 28 days. During the final 14 days of the experiment, half the pigs in each dietary group were inoculated with the parasitic nematode Ascaris suum. Serum biochemistry was measured and hepatic transcriptional responses were determined by RNA-sequencing coupled with gene-set enrichment analysis. A. suum infection resulted in reduced serum phosphate, potassium, sodium, and calcium, and increased serum iron concentrations. In uninfected pigs, PAC supplementation markedly changed the liver transcriptome including genes related to carbohydrate and lipid metabolism, insulin signaling, and bile acid synthesis. However, during A. suum infection, a separate set of genes were modulated by dietary PAC, indicating that the polyphenol-mediated effects were dependent on infection status. A. suum infection strongly influenced the expression of genes related to cellular metabolism, and, in contrast to the effects of PAC, these changes were mostly identical in both control-fed and PAC-fed pigs. Thus, the hepatic response to infection was mostly unaffected by concurrent polyphenol intake. We conclude that the presence of a commonly occurring parasite substantially influences the outcome of dietary polyphenol supplementation, which may have important relevance for nutritional interventions in populations where intestinal parasitism is widespread.
Topics: Swine; Animals; Ascariasis; Transcriptome; Diet; Liver; Polyphenols
PubMed: 36940885
DOI: 10.1016/j.jnutbio.2023.109316 -
Annals of Medicine and Surgery (2012) Mar 2023is an infestation that affects approximately one-seventh of the world's population. is a common inhabitant of the intestines of people with low-socioeconomic incomes,...
UNLABELLED
is an infestation that affects approximately one-seventh of the world's population. is a common inhabitant of the intestines of people with low-socioeconomic incomes, especially in underdeveloped countries of the world. infestation is more prone to infestation with serious complications such as intestinal obstruction, volvulus, intussusception, and intestinal necrosis at higher rates in children than in adults.
CASE PRESENTATION
The authors present here two cases of small bowel obstruction caused by massive that were admitted to the pediatric surgery service after completing a clinical and physical examination, and we operated after rehydration. Both underwent surgical resection with an end-to-end anastomosis. The patient was discharged uneventfully with a plan for de-worming treatment in 6 weeks.
CLINICAL DISCUSSION
Ascariasis is a round intestinal worm infestation transmitted by fecal or oral contamination. Eating and excreting ascaris eggs lead to ascariasis and excrete human feces, which contaminate foods, soil, and/or water in unsanitary environments. In contrast, in the first case of this study, the diagnosis was made by ultrasound and erect abdominal radiography, and, in the second case, an abdominal ultrasound result was equivocal and required an abdominal computed tomography scan for confirmation. Treatment of small bowel obstruction by roundworms is usually surgical, but in the absence of signs of peritonitis, medical management can give effective results, even in the case of total obstruction.
CONCLUSION
The type of surgery undertaken is determined by the results of the laparotomy. If the bowel was found to be intact and the obstruction was at the ileum level, milking worms to the cecum can be done with caution to avoid trauma to the bowel wall. Primary anastomosis after resection of a necrotic bowel segment and removal of the worm bolus is a suitable method for treatment of the ascariasis obstruction.
PubMed: 36923774
DOI: 10.1097/MS9.0000000000000224 -
Le Infezioni in Medicina 2022Intestinal helminthiasis are a common public health problem in developed and developing countries. It is thought that they can influence pregnancy by causing gestational... (Review)
Review
Intestinal helminthiasis are a common public health problem in developed and developing countries. It is thought that they can influence pregnancy by causing gestational anemia. The aim of this study was to determine if there is a relationship between helminth infection and gestational anemia. A structured review of scientific literature was conducted through active search in the electronic databases MEDLINE and LILACS until December 2021, following 2020 PRISMA statement. The studies were reviewed independently by two authors, extracting the most relevant information from each study. Cross-sectional studies, case-control and ecological studies were included, with no date or language limit. Randomized clinical trials were excluded. A total of 38 studies were included in the systematic review. The study populations of all studies belonged to low- and middle-income countries: 28 studies from Africa, 6 from Asia, 3 from Latin America and 1 from Oceania. Overall, the average prevalence of gestational anemia among the included studies was 40% (95% CI 34-46%). Hookworm was the predominant species detected in most studies (19/38; 50%), followed by (15/38; 39.5%). Gestational anemia was positively associated with (OR 1.86, 95% CI 1.12-3.08) and hookworms (OR 3.09, 95% CI 1.99-4.78). Prevalence of malaria was not associated with the magnitude of the effect of hookworm on anemia risk during meta-regression (p=0.5182). The results of this review indicate that there is a statistically significant association between helminthiasis and gestational anemia. Although hookworm is the main species associated with the outcome, prevalence of malaria was not associated with the magnitude of the effect of hookworm on anemia risk. The impact of other species needs to be defined given the expected bias that arises from polyparasitism when defining comparison groups.
PubMed: 36908393
DOI: 10.53854/liim-3101-6 -
Scientific Reports Mar 2023Ascariasis is the most prevalent zoonotic helminthic disease worldwide, and is responsible for nutritional deficiencies, particularly hindering the physical and...
Ascariasis is the most prevalent zoonotic helminthic disease worldwide, and is responsible for nutritional deficiencies, particularly hindering the physical and neurological development of children. The appearance of anthelmintic resistance in Ascaris is a risk for the target of eliminating ascariasis as a public health problem by 2030 set by the World Health Organisation. The development of a vaccine could be key to achieving this target. Here we have applied an in silico approach to design a multi-epitope polypeptide that contains T-cell and B-cell epitopes of reported novel potential vaccination targets, alongside epitopes from established vaccination candidates. An artificial toll-like receptor-4 (TLR4) adjuvant (RS09) was added to improve immunogenicity. The constructed peptide was found to be non-allergic, non-toxic, with adequate antigenic and physicochemical characteristics, such as solubility and potential expression in Escherichia coli. A tertiary structure of the polypeptide was used to predict the presence of discontinuous B-cell epitopes and to confirm the molecular binding stability with TLR2 and TLR4 molecules. Immune simulations predicted an increase in B-cell and T-cell immune response after injection. This polypeptide can now be validated experimentally and compared to other vaccine candidates to assess its possible impact in human health.
Topics: Child; Humans; Ascariasis; Toll-Like Receptor 4; Epitopes, B-Lymphocyte; Vaccines; Escherichia coli; Peptides
PubMed: 36864139
DOI: 10.1038/s41598-023-30445-x -
International Journal of Surgery Case... Mar 2023Ascariasis is one of the most common parasitic infections worldwide, especially in tropical and subtropical developing countries with poor personal hygiene and...
INTRODUCTION AND IMPORTANCE
Ascariasis is one of the most common parasitic infections worldwide, especially in tropical and subtropical developing countries with poor personal hygiene and sanitation. This condition is a staggering worldwide public health problem with high morbidity and mortality. Intestinal obstruction is an acute presentation that occurs in cases where clumps of worms form, causing partial or complete obstruction of the intestinal lumen.
CASE PRESENTATION
We report a case of a 5-year-old boy with total intestinal obstruction due to Ascaris lumbricoides, who underwent exploratory laparotomy and enterotomy to remove the worm masses.
CLINICAL DISCUSSION
Infestation with roundworms is widespread in developing countries. While the majority of the intestinal obstruction they cause may be treated conservatively, in some circumstances, surgery may be required.
CONCLUSION
Infestation with roundworms is widespread in developing countries, and although the majority of the intestinal obstruction they cause may be treated conservatively, in some circumstances, surgery may be required.
PubMed: 36791528
DOI: 10.1016/j.ijscr.2023.107923