The larval stages of the cestode parasites belonging to the genus Echinococcus grow within internal organs of humans and a range of animal species. The resulting diseases, collectively termed echinococcoses, include major neglected tropical diseases of humans and livestock. Echinococcus larvae are outwardly protected by the laminated layer (LL), an acellular structure that is unique to this genus. The LL is based on a fibrillar meshwork made up of mucins, which are decorated by galactose-rich O-glycans. In addition, in the species cluster termed E. granulosus sensu lato, the LL features nano-deposits of the calcium salt of myo-inositol hexakisphosphate (Insp6). The main purpose of our article is to update the immunobiology of the LL. Major recent advances in this area are (i) the demonstration of LL "debris" at the infection site and draining lymph nodes, (ii) the characterization of the decoy activity of calcium Insp6 with respect to complement, (iii) the evidence that the LL mucin carbohydrates interact specifically with a lectin receptor expressed in Kupffer cells (Clec4F), and (iv) the characterization of what appear to be receptor-independent effects of LL particles on dendritic cells and macrophages. Much information is missing on the immunology of this intriguing structure: we discuss gaps in knowledge and propose possible avenues for research.
Animals ; Calcium ; Echinococcosis/parasitology* ; Echinococcus/immunology* ; Echinococcus granulosus/immunology* ; Mucins

Echinococcosis is a zoonotic parasitic disease caused by infection with Echinococcus species. As the drug of first choice for treatment of echinococcosis, albendazole suffers from problems of large doses and remarkable adverse reactions in clinical therapy. Development of novel drugs against echinococcosis is of urgent need. Recently, great advances have been achieved in the research on traditional Chinese medicine for treatment of echinococcosis. This review summarizes the progress of researches on traditional Chinese medicine for treatment of echinococcosis, aiming to provide insights into development of anti-echinococcosis drugs.
Animals ; Humans ; Medicine, Chinese Traditional ; Echinococcosis/parasitology* ; Albendazole/therapeutic use* ; Zoonoses ; Echinococcus multilocularis

OBJECTIVE: To investigate the prevalence of Echinococcus infections in wild carnivores in Serthar County, Sichuan Province, so as to provide insights into echinococcosis control in local areas. METHODS: Stool samples were collected from wild carnivores in Serthar County, Sichuan Province in May 2021, and the host sources of stool samples and Echinococcus infections were identified using PCR assays. The prevalence of E. multilocularis, E. granulosus and E. shiquicus infections was estimated in different hosts. RESULTS: A total of 583 stool samples were collected from wild carnivores, including 147 stool samples from fox, 154 from wolf, 227 from wild dogs and 11 from lynx. The overall prevalence of E. multilocularis, E. granulosus and E. shiquicus infections was 5.68%, 0.19% and 14.20% in canine stool samples, and no E. granulosus infection was detected in fox stool samples, while the prevalence of E. multilocularis and E. shiquicus infections was 0.68% and 47.62% in fox stool samples (χ² = 88.41, P < 0.001). No E. granulosus or E. shiquicus infection was detected in wolf stool samples, and the prevalence of E. multilocularis infection was 10.39% in wolf stool samples. The prevalence of E. multilocularis, E. granulosus and E. shiquicus infections was 5.73%, 0.44% and 2.20% in canine stool samples (χ² = 12.13, P < 0.01). In addition, the prevalence of E. multilocularis infections was significantly higher in wolf stool samples than in canine and fox stool samples (χ² = 13.23, P < 0.01), and the prevalence of E. shiquicus infections was significantly higher in fox stool samples than in canine and wolf stool samples (χ² = 187.01, P < 0.001). No Echinococcus infection was identified in 11 lynx stool samples. CONCLUSIONS The prevalence of Echinococcus infections is high in wild canines in Serthar County, Sichuan Province. Wolf, wild dog and fox all participate in the wild life cycle of E. multilocularis in Serthar County, and wolf and wild dogs may play a more important role.
Animals ; Dogs/microbiology* ; China/epidemiology* ; DNA, Helminth/genetics* ; Echinococcosis/veterinary* ; Feces ; Foxes/microbiology* ; Lynx/microbiology* ; Prevalence ; Wolves/microbiology* ; Carnivora/microbiology*

Hepatic alveolar echinococcosis (AE) is a parasitic disease with biological characteristics similar to malignant tumor. It has no obvious clinical symptoms in the early stage. Most patients have complications such as jaundice, ascites and gastrointestinal bleeding when they see a doctor. At this time, the course of disease is at an advanced stage. In addition, the incomplete resection of the AE lesion(s) leads to a high postoperative recurrence rate, which has a serious impact on the physical and mental health of patients. Based on the summary of the latest research at home and abroad and the analysis of blood supply, microvascular invasion and vascular growth factor expression in the "infiltrating zone" adjacent to the lesions of hepatic AE, this article has a deep understanding of the occurrence and development process of hepatic AE, aiming to better guide clinical practice and improve the quality of life of patients.
Humans ; Echinococcosis, Hepatic/surgery* ; Quality of Life ; Physical Examination

Objective: To understand the spatial characteristics of echinococcosis and associated factors in the pastoral area of Qinghai province, and provide evidence for the effective prevention and control of echinococcosis. Methods: The number of echinococcosis cases in the pastoral areas of Qinghai in 2019 was collected to perform spatial epidemiological analysis. The thematic map of the distribution of echinococcosis cases was generated with software ArcGIS 10.8 for visual analysis and spatial autocorrelation analysis. The spatial autocorrelation and spatial scanning analysis were performed to estimate the clustering of echinococcosis with software SaTScan 9.5. Software GeoDa 1.14 and ArcGIS 10.8 were used to establish spatial lag model and geographical weighted regression model to analyze the related factors of echinococcosis epidemic. Results: In 2019, the echinococcosis surveillance covered 64 741 people in the pastoral area of Qinghai, and 829 echinococcosis cases were found, with a prevalence rate of 1.28%. The distribution of the cases had spatial correlation (Moran's I=0.41, P<0.001). The most possible clustering areas indicated by spatial scanning analysis included Banma, Jiuzhi, Dari and Gande counties of Guoluo Tibetan Autonomous Prefecture (LLR=460.77, RR=9.20, P<0.001). The prevalence of echinococcosis in the pastoral areas was positively associated with the total annual precipitation (β=0.13, P=0.036), and negatively associated with population density (β=-1.36, P=0.019) and doctors/nurse ratio (β=-25.60, P=0.026). Conclusions: The distribution of echinococcosis cases in the pastoral areas of Qinghai in 2019 had spatial correlation, and the prevalence was affected by total annual precipitation, population density, and doctors/nurse ratio.
China/epidemiology* ; Cluster Analysis ; Echinococcosis/epidemiology* ; Epidemics ; Humans ; Prevalence ; Spatial Analysis

Echinococcosis is mainly prevalent in the agricultural and pastoral areas in the northwest of China, but it is relatively rare in Hunan Province. Here, we reported the clinical data of a case of echinococcosis in Hunan Province. The patient was an 11-year-old male, who sought treatment at the Second Xiangya Hospital of Central South University due to abdominal mass. According to the symptoms, signs, and laboratory examinations, he was initially diagnosed as "intra-abdominal mass" and "spleen cyst". Subsequently, he underwent abdominal massive occupying resection and splenectomy. Postoperative pathological examination revealed the cuticle and germinal layer of hydatid and protoscolex, which was consistent with characteristics of echinococcosis. In addition, the serological examination showed that the specific anti-hydatid IgG antibody was positive. Combined with the patient's condition, he was given praziquantel treatment. After a month of follow-up, the patient was asymptomatic.
Animals ; Child ; China ; Echinococcosis/surgery* ; Echinococcus granulosus ; Humans ; Male ; Splenectomy

OBJECTIVE: To investigate the serum microRNA (miRNA) expression and examine the impact of miRNA expression profiles on T helper type 17 (Th17)/regulatory T cells (Treg) imbalance among patients with cystic echinococcosis, so as to provide insights into the illustration of the mechanisms underlying chronic Echinococcus granulosus infections, and long-term pathogenesis. METHODS: Total RNA was extracted from the sera of cystic echinococcosis patients and healthy controls, and subjected to high-throughput sequencing with the Illumina sequencing platform. Known miRNAs were annotated and new miRNAs were predicted using the miRBase database and the miRDeep2 tool, and differentially expressed miRNAs were identified. The target genes of differentially expressed miRNAs were predicted using the software miRanda and TargetScan, and the intersection was selected for Gene Ontology (GO) enrichment analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis. Among the differentially expressed miRNAs with the 20 highest fold changes, miRNAs that targeted genes relating to key transcription factors RORC and FOXP3 that determine the production of Th17 and Treg cells or their important regulatory pathways (PI3K-Akt and mTOR pathways) were matched. RESULTS: A total of 53 differentially expressed miRNAs were screened in sera of cystic echinococcosis patients and healthy controls, including 47 up-regulated miRNAs and 6 down-regulated miRNAs. GO enrichment analysis showed that these differentially expressed miRNA were involved DNA transcription and translation, cell components, cell morphology, neurodevelopment and metabolic decomposition, and KEGG pathway analysis showed that the differentially expressed miRNA were mainly involved in MAPK, PI3K-Akt and mTOR signaling pathways. Among the differentially expressed miRNAs with the 20 highest fold changes, there were 3 miRNAs that had a potential for target regulation of RORC, and 15 miRNAs that had a potential to target the PI3K-Akt and mTOR signaling pathways. CONCLUSIONS Significant changes are found in serum miRNA expression profiles among patients with E. granulosus infections, and differentially expressed miRNAs may lead to Th17/Treg imbalance through targeting the key transcription factors of Th17/Treg or PI3K-Akt and mTOR pathways, which facilitates the long-term parasitism of E. granulosus in hosts and causes a chronic disease.
Echinococcosis/genetics* ; Gene Expression Profiling ; Humans ; MicroRNAs/metabolism* ; Phosphatidylinositol 3-Kinases/genetics* ; Proto-Oncogene Proteins c-akt/genetics* ; T-Lymphocytes, Regulatory ; TOR Serine-Threonine Kinases/genetics* ; Th17 Cells ; Transcription Factors/genetics*

OBJECTIVE: To analyze the current status and evaluate the equity of health human resource allocation for echinococcosis control in Ganzi Tibetan Autonomous Prefecture, Sichuan Province, so as to provide the empirical evidence for optimizing the health human resource allocation for echinococcosis control. METHODS: A questionnaire survey was performed to collect the numbers of health human sources for echinococcosis control, including health workers, healthcare professionals, certified/assistant physicians and registered nurses, per 1 000 permanent residents, per 1 000 m², per 1 000 residents screened using Bmode ultrasonography and per 1 000 echinococcosis patients in two highly endemic counties and three lowly endemic counties in Ganzi Tibetan Autonomous Prefecture, Sichuan Province from 2016 to 2019. The equity of health human resource allocation for echinococcosis control was evaluated by permanent residents and geographical areas using Lorenz curve and Gini index in Ganzi Tibetan Autonomous Prefecture from 2016 to 2019. RESULTS: The numbers of health workers, healthcare professionals, certified/assistant physicians and registered nurses per 1 000 permanent residents, per 1 000 permanent residents, per 1 000 m², per 1 000 residents screened using B-mode ultrasonography and per 1 000 echinococcosis patients were 0.99-, 1.06-, 1.78- and 1.88-fold; 3.38-, 3.67-, 6.00- and 6.00-fold; 1.64-, 1.74-, 3.22- and 3.18-fold; and 64.92-, 70.39-, 139.34- and 117.44-fold more in lowly endemic counties than in highly endemic countries in Ganzi Tibetan Autonomous Prefecture, Sichuan Province, 2019. The Gini indexes of health human resource allocation for echinococcosis control were 0.371 to 0.397 by permanent residents and 0.477 to 0.591 by geographical areas in Ganzi Tibetan Autonomous Prefecture from 2016 to 2019, and the Gini indexes (0.469 to 0.730) for allocation of certified/assistant physicians and registered nurses were both higher than those of health workers and healthcare professionals (0.302 to 0.451) by both permanent residents and geographical areas. CONCLUSIONS The health human resource allocation for echinococcosis control showed general equity by permanent residents and poor equity by geographical areas in Ganzi Tibetan Autonomous Prefecture, Sichuan Province from 2016 to 2019.
China/epidemiology* ; Echinococcosis/epidemiology* ; Health Personnel ; Health Workforce ; Humans ; Resource Allocation ; Ultrasonography

Adult ; Echinococcosis/surgery* ; Echinococcosis, Hepatic/surgery* ; Feasibility Studies ; Female ; Hepatectomy ; Humans ; Kidney Diseases/surgery* ; Liver Diseases/surgery* ; Male ; Middle Aged ; Nephrectomy ; Pneumonectomy ; Retrospective Studies ; Treatment Outcome

Hydatid disease is a zoonotic infection in humans. The disease is endemic in some parts of the world, including Africa, Australia, and Asia, where cattle grazing is common; the disease is spread by an enteric route following the consumption of food contaminated with the eggs of the parasite. Failure to identify this parasite results in delayed diagnosis and increased morbidity to the patient. Upon diagnosis, every possible step should be taken, both surgical and medical, to prevent anaphylactic reactions from the cystic fluid. Postsurgical long-term follow up along with periodical ultrasonography of the liver and computed tomography scan of the abdomen is essential to rule out possible recurrence.
Abdomen ; Africa ; Anaphylaxis ; Animals ; Asia ; Australia ; Cattle ; Delayed Diagnosis ; Diagnosis ; Echinococcosis ; Eggs ; Follow-Up Studies ; Humans ; Liver ; Ovum ; Parasites ; Recurrence ; Ultrasonography ; Zoonoses