Establishment of an animal model of Sparganum mansoni infection and study on therapeutic methods II Establishment of a mouse model of sparganosis mansoni via oral administration of procercoids / 中国血吸虫病防治杂志

Objective To establish an animal model of sparganosis mansoni through oral administration of Cyclops infected with procercoids. Methods Domestic cats were infected with Sparganum mansoni under laboratory conditions, and fresh cat stool samples were collected, washed in dechlorinated water, and filtered. Spirometra mansoni eggs were collected and prepared into suspensions. Twenty C57BL/6j mice were randomly divided into the experimental group (n = 15) and the control group (n = 5). Wild Cyclops were infected with Spirometra mansoni coracidia to allow 3 to 5 procercoids in each Cyclop. Then, each mouse in the experimental group was given 15 Cyclops infected with procercoids by gavage, while mice in the control group were orally administered with the same volume of dechlorinated water. All mice were sacrificed after 5 months, and dissected, and suspicious Sparganum mansoni worms were collected. The serum specific IgG antibody against Sparganum mansoni was measured in mice using enzyme-linked immunosorbent assay (ELISA). Genomic DNA was isolated from suspicious Sparganum mansoni worms, and the specific Sparganum mansoni cytochrome oxidase I (COI) gene was amplified using PCR assay. Results Among the 15 mice in the experimental group, six were positive for the serum specific IgG antibody against Sparganum mansoni, and milky white worms were found and collected from the subcutaneous regions of 4 out of 6 mice. Only one worm was detected in each mouse, and the worm morphology was similar to Sparganum mansoni. Capillary electrophoresis of the PCR amplification products of COI gene presented a specific band with 151 bp in size, and sequencing analysis revealed 100% homology with Sparganum mansoni. Conclusions A mouse model of sparganosis mansoni is successfully created through oral administration of Cyclops infected with Spirometra mansoni procercoids.

Prevalence of Spirometra mansoni infections in hosts in Jiangsu Province / 中国血吸虫病防治杂志

Objective To investigate the prevalence of Spirometra mansoni infections in hosts in Jiangsu Province, so as to provide the scientific basis for the management of sparganosis mansoni. Methods From 2018 to 2019, nine counties (cities, districts) were randomly selected from Jiangsu Province as the survey sites, and 100 healthy individuals were randomly selected to perform the serological test of S. mansoni infections and the detection of S. mansoni eggs. The procercoids were detected in the intermediate host Cyclops, and the S. mansoni eggs were identified in the stool samples of the definitive hosts cats and dogs. Results The prevalence of S. mansoni human infections was 0 (0/900) in the 9 survey sites of Jiangsu Province, and the sero-prevalence of the specific IgG antibody against S. mansoni was 1.22% (11/900). The positive rate of procercoids was 0.33% (3/900) in Cyclops. In addition, the S. mansoni egg-positive rate was 1.48% (2/135) in cats and dogs. Conclusions Sparganosis mansoni is prevalent in Jiangsu Province. Health education pertaining to the damages of sparganosis mansoni and the route of S. mansoni infections should be improved.

Subcutaneous sparganosis: a case report / 中国血吸虫病防治杂志

This case report presents the diagnosis and treatment of a case with subcutaneous sparganosis.

Subcutaneous Sparganosis on Abdomen Mimicking Multiple Lipomas

Human sparganosis is a food-borne zoonosis mainly caused by the plerocercoid belonging to the genus Spirometra. The most common clinical sign of sparganosis is a subcutaneous mass in the trunk including abdominal or chest wall. The mass may be mistaken for a malignant tumor, thereby causing difficulty in terms of diagnosis and treatment. A 66-year-old woman visited our clinic for the removal of a lipoma-like mass. It was movable, hard, and painless. We identified 2 white mass, measuring 0.2×4 cm and 0.2×1 cm. Pathologic findings indicated the white mass was a sparganum. She recalled having eaten a raw frog approximately 60 years before. A 35-year-old who lived North Korea was also presented to our clinic with an asymptomatic nodule on her abdomen. Intraoperatively, we found sparganum approximately 24 cm size. Subcutaneous masses are associated with clinical signs of inflammation or they may mimic a soft tissue neoplasm. While the incidence rate of sparganosis has decreased with economic development and advancements in sanitation, surgeons still encounter patients with sparganosis in the clinical setting. Therefore, a careful history is required in order to diagnose sparganosis.

Breast Sparganosis Presenting with a Painless Breast Lump: Report of Two Cases

Sparganosis is a parasitic infestation caused by sparganum, a plerocercoid tapeworm larva of the genus Spirometra. Since the first case of human sparganosis reported in 1908, sparganosis has been a global disease, and is common in China, Japan, and Southeast Asian countries. Consumption of raw snakes, frogs, fish, or drinking contaminated beverages are sources of human infections. Human sparganosis usually manifests in subcutaneous fat in areas such as the abdomen, genitourinary tract, and limbs. Breast sparganosis cases are rare, representing less than 2% of total cases of human infections. Complete surgical extraction of the sparganum is the treatment of choice. Because of the rarity of the disease, clinical suspicion is vital to reach the diagnosis of breast sparganosis. Here we report 2 rare cases of breast sparganosis presenting with a painless breast lump, both treated with surgical excision and sparganum extraction.

Human Sparganosis in Korea

BACKGROUND: Sparganosis is a larval cestodiasis caused by the plerocercoid of Spirometra spp. Since the first description of human sparganosis in 1924, several hundred cases have been reported in Korea. However, systematic approaches for literature surveys of Korean sparganosis have seldom appeared. METHODS: We searched publicly available databases such as PubMed, Research Information Sharing Service, and Korea Medical Citation Index with relevant Medical Subject Headings. RESULTS: At least 438 Korean sparganosis cases have been described from 1924 to 2015. Preoperative diagnosis has been significantly increased since the 1980s due to popularization of serological and imaging diagnostics. Cases were largely detected from fifth decades in general, but cerebral sparganosis was detected in relatively young age groups (third and fourth decades). Sparganosis was prevalent in men (75.9%). Consumption of frog/snake and drinking unfiltered water were found in 63.4% and 16.9% of patients, respectively. Most frequently affected sites were subcutaneous tissues (49.9%), followed by the central nervous system (36.2%). Involvements of visceral organs (7.6%), ocular regions (3.6%), and muscles (2.7%) were noticed. In women, breast sparganosis constituted a large proportion (34.2%). Sparganosis associated with immunocompromised patients has recently been reported. CONCLUSION: Sparganosis has been continuously reported in Korea during the past 90 years, although its incidence has decreased during the last 20 years. The disease is mostly characterized by subcutaneous nodule, but infection of the worm in vital organs often results in serious illness. Continuous awareness is warranted to monitor sparganosis occurrence and associated clinical consequences.

Praziquantel Treatment of Eosinophilic Gastritis Suspected to Be Due to Cerebral Sparganosis / 대한내과학회지

Eosinophilic gastritis is characterized by eosinophilic infiltration of the gastrointestinal tract, which is associated with abdominal pain, diarrhea, nausea, and vomiting. The possible etiologies of secondary eosinophilic gastritis, including drug reactions, parasitic infestation, and malignancy, must be evaluated. Herein we report the case of a 65-year-old North Korean defector who presented with nausea and vomiting for 1 year. Secondary (reactive) eosinophilic gastritis caused by cerebral sparganosis was suspected after a workup that included brain magnetic resonance imaging, cerebrospinal fluid tapping, and gastric mucosal biopsy. The patient showed dramatic clinical improvement with high-dose praziquantel treatment. Even though secondary (reactive) eosinophilic gastritis caused by parasites is very rare, this case shows the importance of considering parasitic infection in eosinophilic gastritis.

Establishment of an animal model of Sparganum mansoni infection and study on therapeutic methods Ⅰ Establishment of an animal model of Sparganum mansoni infection in mice and changes of serum specific antibody levels post-infection / 中国血吸虫病防治杂志

Objective To establish an animal model of Sparganum mansoni (plerocercoid larva of S. mansoni) infection in mice and observe the changes of blood routine examinations and serum anti-sparganum antibody levels after the infection. Methods The spargana tapeworms were collected from frogs, and 25 Kunming mice were orally infected with the Sparganum tapeworms (3 tapeworms/mouse). Two days before the infection and 2, 7, 14, 21, 28, 35, 42 days and 49 days after the infection, the peripheral blood samples of mice were collected for the blood routine examinations and the detections of anti-S. mansoni IgG antibody with ELISA. Forty-nine days after the infection, all the mice were sacrificed to find out the Sparganum tapeworms in the bodies of mice. Results The count of the total white blood cells was significantly elevated on the second day of the mice infected with Sparganum. The serum anti-Sparganum antibody was detected on the 14th day of the infection in some mice, and on the 21st day of the infection, the serum anti-Sparganum antibody was detected in all the mice. After the mice were sacrificed, the Sparganum tapeworms were found out in many tissues and organs, and especially in the subcutaneous tissues and muscle. Conclusion The establishment of animal model of Sparganum infection is successful in mice with the oral method, and white blood cells and serum specific IgG antibody detection can be used as auxiliary diagnosis methods of S. mansoni infection.

Establishment of an animal model of Sparganum mansoni infection and study on therapeutic methods Ⅰ Establishment of an animal model of Sparganum mansoni infection in mice and changes of serum specific antibody levels post-infection / 中国血吸虫病防治杂志

Objective To establish an animal model of Sparganum mansoni (plerocercoid larva of S. mansoni) infection in mice and observe the changes of blood routine examinations and serum anti-sparganum antibody levels after the infection. Methods The spargana tapeworms were collected from frogs, and 25 Kunming mice were orally infected with the Sparganum tapeworms (3 tapeworms/mouse). Two days before the infection and 2, 7, 14, 21, 28, 35, 42 days and 49 days after the infection, the peripheral blood samples of mice were collected for the blood routine examinations and the detections of anti-S. mansoni IgG antibody with ELISA. Forty-nine days after the infection, all the mice were sacrificed to find out the Sparganum tapeworms in the bodies of mice. Results The count of the total white blood cells was significantly elevated on the second day of the mice infected with Sparganum. The serum anti-Sparganum antibody was detected on the 14th day of the infection in some mice, and on the 21st day of the infection, the serum anti-Sparganum antibody was detected in all the mice. After the mice were sacrificed, the Sparganum tapeworms were found out in many tissues and organs, and especially in the subcutaneous tissues and muscle. Conclusion The establishment of animal model of Sparganum infection is successful in mice with the oral method, and white blood cells and serum specific IgG antibody detection can be used as auxiliary diagnosis methods of S. mansoni infection.

Differential Diagnosis of Human Sparganosis Using Multiplex PCR

Human sparganosis was diagnosed by morphological and genetic analyses in Korea. The complete mitochondrial genomes of Spirometra erinaceieuropaei and S. decipiens isolated in Korea have been recorded. Present study was performed to provide information to diagnose the etiologic agent of sparganosis by multiplex PCR using mitochondrial genome sequences of S. erinaceieuropaei and S. decipiens. In an effort to examine the differential diagnosis of spirometrid tapeworms, multiplex PCR assays were performed on plerocercoid larvae of S. erinaceieuropaei and S. decipiens. The PCR products obtained using species-specific primers were positively detected in all PCR assays on mixture of S. erinaceieuropaei and S. decipiens DNA. S. erinaceieuropaei-specific bands (239 bp and 401 bp) were obtained from all PCR assays using a mixture of S. erinaceieuropaei-specific primers (Se/Sd-1800F and Se-2018R; Se/Sd-7955F and Se-8356R) and S. erinaceieuropaei template DNA. S. decipiens-specific bands (540 bp and 644 bp) were also detected in all PCR assays containing mixtures of S. decipiens-specific primers (Se/Sd-1800F and Sd-2317R; Se/Sd-7955F and Sd-8567R) and S. decipiens template DNA. Sequence analyses on these species-specific bands revealed 100% sequence identity with homologous regions of the mtDNA sequences of S. erinaceieuropaei and S. decipiens. The multiplex PCR assay was useful for differential diagnosis of human sparganosis by detecting different sizes in species-specific bands.

Observation of immunoglobulin A secreting cells and secretory immunoglobulin A in jejunum of mice infected with plerocercoids in snakes / 中华地方病学杂志

Objective To observe the immunoglobulin A secreting cells (IgASCs) and secretory IgA (sIgA) level in jejunum of mice infected with plerocercoids,and to understand the roles of resistance to invasion processes of the plerocercoids.Methods A total of 100 Kunming mice (half males and half females) were chosen,the weight was 20-25 g,they were randomly divided into control and experiment groups according to their body weight via the random number table method,50 per group.Mice of experiment group were fed each with 5 plerocercoids in snakes,and mice of control group were not infected,testing time and methods were the same in the two groups.Ten mice were randomly sacrificed from one group on days 1,7,14,28 and 56 after infection,to collect empty intestinal juice and jejunal segment.The immunohistochemical method was used to examine the quantity of IgASCs in jejunal mucosa,while enzyme-linked immunosorbent assay (ELISA) was applied to test the level of slgA of jejunal fluid.Results The IgASCs were distributed in lamina propria of the jejunal mucosa,and the percentage of positive IgASCs reached the peak value [(64.24 ± 0.60)％] at d 1 after infection in experiment group,then decreased,and it was lower than control group at d 14 [(41.98 ± 0.42)％ vs (43.52 ± 0.94)％,t =-4.727,P ＜ 0.01].The sIgA level reached the peak value [(22.05 ± 1.43) mg/L] at d 7 after infection in experiment group,then decreased,and there was no statistical significant difference between control and experiment groups at d 56 [(20.00 ± 0.42) mg/L vs (21.26 ± 2.59) mg/L,t =1.516,P ＞ 0.05].There was a positive correlation between the percentage of positive IgASCs in the jejunal mucosa and sIgA level in the jejunal fluid at d 7 after infection (r =0.663,P ＜ 0.01),and there was a negative correlation between them at d 14 after infection (r =-0.542,P ＜ 0.05).Conclusion The plerocercoids infection might induce high level expressions of IgASCs and sIgA,they show positive correlation at d 7 after infection.

Sparganosis of the Unilateral Breast: A Case Report

Sparganosis is a parasitic infection caused by the sparganum, the plercercoid of the genus Spirometra. The preoperative diagnosis of breast sparganosis is difficult in most cases because it is a rare parasitic infection less than 2% of all cases. We report a 62-year-old woman case of breast sparganosis that were confirmed by surgical removal of worms from the right breast. The radiologic images of the patient also revealed characteristic features of breast sparganosis. The patient described the migrating palpable breast mass, which strongly suggested the possibility of breast sparganosis. The treatment of choice and confirmative diagnosis for sparganosis are complete surgical extraction of the sparganum irrespective of infected site. Inspection of the mass site with detailed medical history and radiological examinations are important for preoperative diagnosis of sparganosis patients.

A Case of Cerebral Cysticercosis in Thailand

Cysticercosis and sparganosis are not uncommon parasitic infections in the developing world. Central nervous system infection by both cestodes can present with neurological signs and symptoms, such as seizure and mass effect, including brain hernia. Early detection and accurate diagnosis can prevent a fatal outcome. Histological examinations of brain tissues can confirm the diagnosis of cerebral cysticercosis, which differs from sparganosis by the presence of a cavitated body. We report here a case of cerebral cysticercosis which has the similar clinical and imaging findings as sparganosis.

Aspiración estereotáctica de una larva de Spirometra spp. / Stereotactic aspiration of Spirometra mansonides larvae

Brain sparganosis is a non-common parasite infection by Diphyllobothrium or Spirometra mansonoides larvae. This last one is responsible for most of the infestations in humans. We report a 19 years male patient bearer of a brain sparganosis. The patient presented with headache and left hemiparesis. CT diagnosis of right thalamic lesions was made and aspiration biopsy was performed using stereotactic system, obtaining a whole and death larvae. Histopathology confirms a CNS parasitism and it was treated initially with albendazol. ELISA test confirmed Spirometra spp. infestation. The patient developed asymptomatic with total remission of the lesions. It constitutes the second report in Cuba of brain sparganosis.

Se presenta el caso clínico de un varón con 19 años de edad y el diagnóstico de una esparganosis cerebral. Consultó por cefalea y una hemiparesia izquierda. En una tomografía computarizada cerebral con contraste se observaron lesiones talámicas derechas. Se realizó una biopsia cerebral guiada por estereotaxia con aspiración completa de un verme. En el estudio histopatológico se planteó un probable parasitismo de SNC y fue tratado inicialmente con albendazol. Se confirmó la infección por Spirometra spp. por test de ELISA. Evolucionó con regresión de síntomas y remisión imagenológica de las lesiones. Este caso constituye el segundo reporte en Cuba de una infestación cerebral por este parásito y aspiración estereotáctica de la larva de Spirometra spp.

Clinical features, radiological characteristics, and pathological changes in 42 patients with cerebral sparganosis / 中华神经科杂志

Objective To investigate the clinical features,the radiological characteristics,and the pathological changes of cerebral sparganosis.Methods We retrospectively collectted and summarized the clinical data of 42 patients with cerebral sparganosis from the Iinstitute of Anti-parasitic Diseases of Jiangxi Province and the First Affiliated Hospital of Nanchang University during January 2000 to January 2014.The follow-up period of the 42 patients ranged from 4 to 96 months.Results Forty-two cases (30 males and 12 females) with cerebral sparganosis were enrolled in the study.Among the 42 patients,34 cases suffered from seizures,16 cases experienced headaches,and 14 cases had limb weakness.The brain CT scan showed the small and punctuate calcifications scattering around the lesions in 18 cases.The features of enhanced MRI included aggregating ring-like enhancement in 38 cases,tunnel lesions in 14 cases,and lesion migration in 13 cases.Twenty-four of the 42 patients were performed surgery.The brain tissues revealed multiple inflammatory tunnels,in which live or degenerated larvae were identified in 20 cases,but only eosinophilia tunnels were observed in the other 4 cases.The serum and cerebro-spiral fluid specimens from 18 patients without surgery were positive to spirometra mansoni antigen.Their cerebral lesions disappeared and got a favorable prognosis after administration of praziquantel in long term follow-ups.Conclusions There is a high incidence of cerebral sparganosis in Poyang lake basin.The clinical features of cerebral sparganosis mainly include seizure,headache and hemiparesis.The enhanced lesions show knot or tunnel signs on multi-planar MRI which are associated with the multiple inflammatory tunnels of larvae migration.A longterm administration of high dose opraziquantel can also get a good treatment prognosis without the classical surgical therapy for cerebral sparganosis.

A Case of Sparganosis Detected by Ultrasonography in a Patient with Colon Cancer / 대한피부과학회지

No abstract available.

A Case of Sparganosis that Mimicked Recurrence of Contralateral Breast Cancer / 대한내과학회지

Sparganosis is a rare parasitic infection caused by plerocercoid tapeworm larvae of the genus Spirometra. While initially asymptomatic, the migrating larvae initially appear as subcutaneous nodules, which can be mistaken for cancer because all parts of the body can be affected, including the abdominal cavity, genitourinary tract, gastrointestinal tract, musculoskeletal system, central nervous system, and even the breasts. Therefore, we report here a case of sparganosis that was differentially diagnosed from recurrence of breast cancer.

Intramuscular Sparganosis in the Gastrocnemius Muscle: A Case Report

Sparganosis is a parasitic infection caused by the plerocercoid tapeworm larva of the genus Spirometra. Although the destination of the larva is often a tissue or muscle in the chest, abdominal wall, extremities, eyes, brain, urinary tract, spinal canal, and scrotum, intramuscular sparganosis is uncommon and therefore is difficult to distinguish from a soft tissue tumor. We report a case of intramuscular sparganosis involving the gastrocnemius muscle in an elderly patient who was diagnosed using ultrasonography and MRI and treated by surgical excision. At approximately 1 cm near the schwannoma at the right distal sciatic nerve, several spargana worms were detected and removed.

Recurred Sparganosis 1 Year after Surgical Removal of a Sparganum in a Korean Woman

Sparganosis, an infection due to the plerocercoid of Spirometra erinacei, are found worldwide but the majority of cases occur in East Asia including Korea. This report is on a recurred case of sparganosis in the subcutaneous tissue of the right lower leg 1 year after a surgical removal of a worm from a similar region. At admission, ultrasonography (USG) of the lesion strongly suggested sparganosis, and a worm was successfully removed which turned out to be a sparganum with scolex. Since sparganum has a variable life span, and may develop into a life-threatening severe case, a patient once diagnosed as sparganosis should be properly followed-up for a certain period of time. Although imaging modalities were useful for the diagnosis of sparganosis as seen in this case, serological test such as ELISA should also be accompanied so as to support the preoperative diagnosis.

Usefulness of Ultrasonography in the Diagnosis of Sparganosis: A Case Report / 대한피부과학회지

Sparganosis is a kind of parasitic skin disease caused by sparganum, the plerocercoid larvae of the taper worm of the genus Spirometra. Sparganosis usually manifests as migrating or fixed subcutaneous nodules; therefore, it should be differentiated from lipoma, cysts, and cutaneous malignancies. Although the final diagnosis of sparganosis in humans depends on the identification of the worm in an infected tissue, suspicion for the presence of the parasite and careful history taking are important before making the diagnosis. However, it might be difficult for a clinician to suspect the existence of sparganosis because the incidence of this disease is extremely low. Therefore, an effective method for differentiating sparganosis from other skin disorders is needed. We suggest that ultrasonography could be an answer to this problem, on the basis of our experience of a case of cutaneous sparganosis in a 65-year-old woman showing very characteristic ultrasonographic findings.