Extension block pinning for chronic volar base fractures of the middle phalanges.

Due to the simplicity, low cost and benefit of avoiding long-term joint immobilization, extension block pinning could be a suitable option for treating the volar base fractures of the middle phalanges. The aim of the present study was to evaluate the outcomes of using extension block pinning in chronic volar base fractures of the middle phalanges. In total, 26 patients with chronic closed volar base fractures of the middle phalanges were included our study. The mean age was 37 years (SD 11.59), and the mean follow-up time was 35 months (SD 19.41). The mean active range of motion (ROM) after surgery was 93° (SD 12.9). There was a negative correlation between the age and the ROM of the injured proximal interphalangeal joint after surgery. ROM did not correlate with the articular surface involvement or the interval between injury and surgery. We obtained a satisfactory result from extension block pinning for volar base fractures of the proximal interphalangeal joint in patients with chronic injuries.Level of evidence: IV.

Does vitamin D reduce the mortality rate of Plasmodium infection?: a systematic review and meta-analysis.

BACKGROUND: Vitamin D supplementation is recommended as an effective adjunct to counteract malaria pathogenesis, but the evidence on this point is limited and controversial. This systematic review and meta-analysis aimed to investigate the effect of vitamin D administration on the survival rate of Plasmodium-infected animals in experimentally-induced malaria on days 6 and 10 post-infection. METHODS: Five electronic databases were searched up to 20 December 2021. The pooled risks ratio (RR) and associated 95% confidence interval were estimated using the Restricted-maximum likelihood (REML) random-effects model. Heterogeneity was assessed by Cochran's Q test and I2 value. Sub-group analyses were used to identify the sources of heterogeneity for several variables, such as type of vitamin D, type of intervention, and dose of vitamin D. RESULTS: Out of 248 articles found in the electronic database, six were eligible for inclusion in the meta-analysis. The current study found that the pooled random effect of risks ratio favored a statistically significant effect of vitamin D administration on survival rate in infected mice on day 6 post Plasmodium infection (RR = 1.08, 95%CI 1.03, 1.15, p < 0.99; I2 = 0%). It also found that vitamin D administration significantly affected the survival rate on day 10 post-infection (RR = 1.94, 95%CI 1.39, 2.71, p < 0.001; I2 = 69.02%). Subgroup analyses demonstrated a significant pooled RRs of the positive effect of vitamin D administration for cholecalciferol (RR = 3.11, 95%CI 2.41, 4.03, p < 0.001; I2 = 0%), doses higher than 50 µg/kg (RR = 3.37, 95%CI 2.55, 4.27, p < 0.001; I2 = 0%), and oral administration (RR = 3.01, 95%CI 2.37, 3.82, p < 0.001; I2 = 0%). CONCLUSION: This systematic review and meta-analysis showed that vitamin D administration positively affects the survival rate in Plasmodium-infected mice. Since, the mouse model may not accurately reproduce the clinical and pathological features of human malaria, future research should investigate the impact of vitamin D in human malaria.

The effect of tranexamic acid on synovium of patients undergoing arthroplasty and anterior cruciate ligament reconstruction surgery.

Preoperative hemorrhage can be reduced using anti-fibrinolytic medicine tranexamic acid (TXA). During surgical procedures, local administration is being used more and more frequently, either as an intra-articular infusion or as a perioperative rinse. Serious harm to adult soft tissues can be detrimental to the individual since they possess a weak ability for regeneration. Synovial tissues and primary fibroblast-like synoviocytes (FLS) isolated from patients were examined using TXA treatment in this investigation. FLS is obtained from rheumatoid arthritis (RA), osteoarthritis (OA), and anterior cruciate ligament (ACL)-ruptured patients. The in vitro effect of TXA on primary FLS was investigated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) cell viability assays for cell death, annexin V/propidium iodide (PI) staining for apoptotic rate, real-time PCR for p65 and MMP-3 expression, and enzyme-linked immunosorbent assay (ELISA) for IL-6 measurement. MTT assays revealed a significant decrease in cell viability in FLS of all groups of patients following treatment with 0.8-60 mg/ml of TXA within 24 h. There was a significant increase in cell apoptosis after 24 h of exposure to TXA (15 mg/ml) in all groups, especially in RA-FLS. TXA increases the expression of MMP-3 and p65 expression. There was no significant change in IL-6 production after TXA treatment. An increase in receptor activator of nuclear factor kappa-Β ligand (RANK-L) production was seen only in RA-FLS. This study demonstrates that TXA caused significant synovial tissue toxicity via the increase in cell death and elevation of inflammatory and invasive gene expression in FLS cells.

Molecular identification and genotyping of Toxoplasma gondii isolated from sheep and cattle in northern Iran.

Toxoplasmosis, a foodborne disease, in human occurs commonly after the ingestion of tissue cysts via the raw and/or undercooked meat of different infected intermediate hosts such as sheep and cattle. The current study aimed to detect the genetic structure of Toxoplasma gondii isolated from various organs of sheep and cattle in the north of Iran. Conventional PCR was carried out by B1 and REP-529 genes of T. gondii. Nested and RFLP-PCR were performed for all positive samples using SAG2 and GRA6 genetic markers. Amplicons from second round of nested-PCR were sequenced and analyzed with NCBI database. Among of 179 examined samples, 38(21.20%) were positive. The highest of positive cases were found in kidney (28.60%). PCR-RFLP of SAG2 and GRA6 genes demonstrated the alleles of clonal type III in the all of isolates. Sequence analysis of the amplicons revealed the alleles of clonal type III and atypical isolates (Tg-67, Tg-100 and Tg-106). Phylogenetic analyses showed separate clade for the atypical isolates from others in the present study and the reference strains clades. In conclusion, the genetic characterization of T. gondii isolates from sheep and cattle showed high genetic diversity compared with standard type I, II and III genotypes. These results support the hypothesis of the existence of polymorphic and overlapping strains within livestock in Iran. It also suggested the necessity of increased genotyping and sampling efforts to accurately estimate T. gondii intra specific genetic diversity.

Does core stability training improve hopping performance and kinetic asymmetries during single-leg landing in anterior cruciate ligament reconstructed patients?

Safe return to sport (RTS) after anterior cruciate ligament reconstruction (ACLR) surgery is important. Core stabilization is common within rehabilitation, but its influence on hopping performance and single-leg landing kinetics among athletes post-ACLR is unclear. Twenty-four male professional athletes who had ACL reconstruction surgery (time since surgery = 11.47 ± 1.55 months) were recruited and randomly assigned to exercise (n = 12) and control (n = 12) groups. Exercise group received an 8-week core stability exercise program. Limb symmetry index (LSI) for single-leg hop for distance (SLH) and triple hop (TRH) tests, and single-leg landing kinetics (multidirectional ground reaction forces) were measured pre- and post-intervention. In post-test, the participants in exercise group were more symmetrical in SLH (P = .04, CI = 0.01-7.68) and TRH (P = .01, CI = 0.28-11.1) distances. They also improved their LSI values for vertical ground reaction force (vGRF), though not significantly (P < .05). LSI for anteroposterior (a-p) and mediolateral (m-l) GRFs remained unchanged for participants of both groups. Our findings indicate the positive effect of core exercise on decreasing between-limb asymmetries during SLH and TRH tests. Our results demonstrate that despite lack of change in kinetics, functional performance is more symmetrical following core stability training.

Inhibitory Effects of Cold Atmospheric Plasma on Inflammation and Tumor-Like Feature of Fibroblast-Like Synoviocytes from Patients with Rheumatoid Arthritis.

Rheumatoid arthritis (RA) is a chronic, debilitating systemic disease characterized by chronic inflammation and progressive joint destruction. Fibroblast-like synoviocytes (FLSs) are one of the most important players in the pathophysiology of RA, acting like tumor cells and secreting inflammatory cytokines. Previous research has shown that cold atmospheric plasma (CAP) inhibits cancer cells and may have anti-inflammatory properties. This study examined the effects of argon plasma jet-produced CAP on the suppression of invasion and inflammation caused by cultured RA-FLS. The findings revealed that CAP reduced cell viability and elevated the percentage of apoptotic RA-FLS by producing reactive oxygen species. Carboxyfluorescein diacetate succinimidyl ester (CFSE) staining confirmed that CAP could decrease the proliferation of RA-FLS. Furthermore, CAP effectively reduced the production of inflammatory factors (e.g., NF-κB and IL-6) as well as destructive factors like receptor activator of nuclear factor kappa-B ligand (RANKL) and matrix metalloproteinases-3 (MMP-3). These data suggest that CAP could be a promising treatment for slowing the progression of RA by reducing tumor-like features and inflammation in RA-FLS.

Global prevalence of Strongyloides stercoralis in dogs: A systematic review and meta-analysis.

Strongyloides stercoralis is an intestinal parasitic helminth that mainly affects humans and dogs throughout the world. Canine strongyloidosis is generally characterized by asymptomatic infection, with fatal disease in cases of immunodeficiency. This study was conducted in order to evaluate the global prevalence of S. stercoralis in dogs. Six electronic databases were searched for this purpose. The random effects model and 95% confidence intervals (CI) were applied to determine the overall and subgroup pooled prevalence. Heterogeneity was assessed by Cochran's Q test and I2 statistic. In total, 56 datasets from 50 studies from 1,202 peer-reviewed papers were included in the current meta-analysis. 20,627 dogs were assessed in 27 countries across six World Health Organization (WHO) regions. The global prevalence of S. stercoralis infection among dogs was 6% (95% CI 4-8%; 868/20,627). According to WHO regions, the estimated prevalence ranges 2% to 11% as follows: Western Pacific (11%, 0-31%); Africa (9%, 2-19%); America (6%, 3-11%); South-East Asia (5%, 1-13%)' Europe (3%, 2-5%); and Eastern Mediterranean (2%, 0-6%). The pooled prevalence of S. stercoralis infection in dog owners was 7% (1-18%). The prevalence of S. stercoralis infection in studies based on serological assays was significantly higher than other techniques (29%, 20-39%). Younger female dogs, less than one year old, from rural areas had higher prevalence rates than their male counterparts, with no statistically significant differences. From this review, it is concluded that the low global prevalence of S. stercoralis in dogs may be strongly associated with low sensitivity diagnostic methods applied in most studies leading to the underestimation of infection rates. Therefore, the improvement of diagnostic techniques is recommended for precise evaluation of the disease.

Human fibroblast-like synoviocyte isolation matter: a comparison between cell isolation from synovial tissue and synovial fluid from patients with rheumatoid arthritis.

OBJECTIVE: Cell culture technology has become a popular method in the field of cell biology, pharmacology, and medical researches. Primary cells represent the normal physiological condition of human cells. Fibroblasts are the most common native cells of connective tissue that play a crucial role in the entire pathogenesis of various disorders, such as rheumatoid arthritis (RA). Fibroblast-like synoviocytes (FLSs), which overlie the loose connective tissue of the synovial sublining, are known to be the central mediators of joint damage. The most routine approach for the isolation of FLS is an enzymatic digestion of synovial tissue. This experimental study is designed to introduce an easy, fast, and high-throughput method compared with enzymatic digestion for isolation of FLS. METHODS: The synovial tissue and synovial fluid (SF) samples were collected from eight patients with RA who underwent routine knee replacement surgery. Synovial tissue was incubated with collagenase VIII enzyme, while SF was washed with a similar volume of phosphate-buffered saline. The cells were further subcultured and stored based on the standard protocols. The purity of isolated synoviocytes was confirmed using flow cytometry analysis. RESULTS: Isolation of FLS from SF was more successful with a faster rate, 3-5 days after culture. The morphological assessment and flow cytometry analysis confirmed the purity of SF-derived cells in passage 4. CONCLUSIONS: SF could be a more accessible source of FLS than synovial tissue. Obtaining primary FLS from SF is a simple, fast, and cost-effective way to have a large-scale cell during a short time.

Is COVID-19 associated with latent toxoplasmosis?

The present study aimed to evaluate the possible association between coronavirus disease 2019 (COVID-19) and latent Toxoplasma gondii infection in a group of patients and healthy individuals. Blood samples were obtained from 269 PCR-positive COVID-19 patients. The serum was separated and tested for the existence of anti-T. gondii antibodies (IgG) using a commercial enzyme-linked immunosorbent assay kit. The prevalence of latent toxoplasmosis between a subgroup of the patients (aged under 55 years old) and COVID-19 negative individuals was compared. Anti-T. gondii antibodies were found in 226/269 (84.0%) patients with COVID-19. Anti-Toxoplasma antibodies were detected in 72/91 (79.1%) cases and 96/123 (78.0%) COVID-19 negative individuals (odd ratio = 1.1; 95% confidence interval: 0.55-2.07, P = 0.85). The median and interquartile range (IQR) of the IgG titer were not statistically significant different between case (97.3 [31.0-133.5]) and control groups (34.4 [13.0-144.5]) (P = 0.10). These findings demonstrated that latent Toxoplasma infection is prevalent amongst the COVID-19 patients. It also did not find any significant association between chronic toxoplasmosis and COVID-19.

Modulation of mRNA Expression of Monoacylglycerol Lipase, Diacylglycerol Lipase and Cannabinoid Receptor-1 in Mice Experimentally Infected with T. gondii.

Toxoplasma gondii, an obligate intracellular parasite, infects more than 30% of world's population. This parasite is considered to be neurotropic, and has high tropism for the central nervous system, and potentially induces cryptogenic epilepsy by no clear mechanism. The current study aimed to investigate the alteration of the main components of the endocannabinoid signaling systems in T. gondii-infected mice. For this purpose, the levels of mRNA expression of monoacylglycerol lipase (MAGL), diacylglycerol lipase (DAGL) and cannabinoid receptor-1 (CB1), were measured by quantitative real time PCR.The mRNA expression level of MAGL was increased by ~ 8-fold in the brains of the Toxoplasma-infected group in comparison with non-infected mice (P<0.0001). The mRNA expression of CB1 gene in the brain of the infected mice was ~ 2 times higher than that measured in control group (P<0.01). The mRNA expression level of DAGL remained unchanged in the infected mice. Overall a substantial increase in MAGL and CB1 expression without any changes in DAGL, in the brain of infected mice suggests that T. gondii disturbs the endocannabinoid signaling pathways, which are known as neurotransmitter modulators involved in epilepsy.

Toxoplasma gondii infection and spontaneous abortion: A systematic review and meta-analysis.

Toxoplasmosis is one of the most common parasitic infections in humans, which is caused by Toxoplasma gondii. It is usually asymptomatic but primary infection in a pregnant woman can cause severe consequences in the fetus such as miscarriage. This study aimed to estimate the global prevalence of T. gondii infection in women with spontaneous abortion. It also evaluates the possible relationship between recent Toxoplasma infection and miscarriage. Five electronic databases were reviewed. We used the random effects model and 95% confidence intervals(CI) to determine the overall prevalence and odds ratio (OR). Heterogeneity was calculated using Cochran's Q test and I2 statistic. The included studies were divided into three sub-groups based on antibody class against T. gondii and the existence of parasite DNA. Based on PCR, the pooled random-effects estimates that the prevalence of T. gondii infection in women with abortion was 10% (95% CI 7-14%). The pooled random effect favored a statistically significant increased risk of latent Toxoplasma infection [OR = 1.84; 95% CI: 1.41-2.40, P < 0.001] and recent infection [OR = 3.72; 95% CI: 2.21-6.26, P < 0.001] in women with spontaneous abortions. In recent infections, significant pooled ORs of positive association were observed in women with miscarriage [OR = 4.2; 95% CI: 2.04-8.85; χ2 = 17.2; I2 = 42.0%, P = 0.07]. This study demonstrates that recent T. gondii infection is associated with an elevated risk of spontaneous abortion. Further studies concerning all risk factors related to toxoplasmosis, and undertaking confirmatory tests at the time of abortion should be performed to investigate the impact of T. gondii infection and spontaneous abortion.

Association between Toxoplasma gondii exposure and hematological malignancies: A systematic review and meta-analysis.

The possible association between Toxoplasma gondii infection and hematological malignancies has been suggested by several studies. The current systematic review and meta-analysis was directed to further understand this relationship. In the present study, five electronic databases were reviewed for T. gondii infection in patients with blood cancer. The random effects model and 95% confidence intervals (CI) were used to determine the overall odds ratio (OR). Heterogeneity was deliberate with Cochran's Q test and I2 statistic. In total, 13 studies including 1504 patients with hematological neoplasia and 2622 subjects without any malignancies were included in this meta-analysis. Overall, 324 patients with blood cancer and 391 subjects without any malignancies were exposed to Toxoplasma infection. The pooled random effect favored a statistically significant increased risk of T. gondii infection in patients with hematological neoplasia compared with non-cancer individuals [OR = 2.43; 95% CI: 1.49-3.97; χ2 = 49.7, I2 = 75.9%, P = 0.00]. Also, significant pooled ORs of positive association were observed for studies which measured anti- Toxoplasma antibodies (IgG) [OR = 2.66; 95% CI: 1.46-4.83; χ2 = 40.3; I2 = 82.6%, P = 0.00]. T-value and P-value were obtained 0.20 and 0.85 by Harbords modified regression test. This meta-analysis demonstrates that toxoplasmosis may be associated with an elevated risk of hematological malignancies. Also, it has found that immunoglobulin class and types of blood cancer are the specific sources of heterogeneity. Additional studies should be performed to examine the impact of T. gondii infection in the onset or development of hematologic neoplasms in the future.

Serological assays for the diagnosis of Strongyloides stercoralis infection: a systematic review and meta-analysis of diagnostic test accuracy.

The standard method for the diagnosis of Strongyloides stercoralis, stool examinations, is inconvenient and, therefore, serological methods have been proposed. This study aimed to evaluate the accuracy of serological assays for the diagnosis of strongyloidiasis using a systematic review and meta-analysis model. Four electronic databases were reviewed. We used a random effects model and 95% CIs to determine the overall sensitivity, specificity and diagnostic odds ratio (DOR). Heterogeneity was intended with Cochran Q χ2 test and I2 statistic. The accuracy of serological assays resulted in a sensitivity of 71.7% (95% CI: 56.07 to 83.4%), a specificity of 89.9% (95% CI: 80.8 to 94.9%) and a DOR of 22.5 (95% CI: 10.8 to 46.9). The forest plot showed high heterogeneity regarding sensitivity (I2=90.4%, 95% CI: 87.4 to 93.3%; Q=228.1, p=0.000) and specificity (I2=98.9%, 95% CI: 98.8 to 99.1%; Q=2066.4, p=0.000). Fagan's nomogram showed that the probability of someone having the infection and with a positive test result was 49%. Deeks' funnel plots showed no evidence of potential publication bias for the studies (p=0.26). The current review suggests that serological techniques have acceptable sensitivity and specificity and therefore can be recommended for the screening of S. stercoralis infection.

Association between Cryptosporidium infection and cancer: A systematic review and meta-analysis.

The link between cryptosporidiosis and cancer has been suggested by some epidemiological studies. This systematic review and meta-analysis was conducted to further understand this relationship. In the current study, six electronic databases were reviewed for Cryptosporidium infection in cancer patients. We used random effects model and 95% confidence intervals (CI) to determine the overall odds ratio (OR). Heterogeneity was calculated with Cochran's Q test and I2statistic. In total, 19 studies involving 3562 individuals with case-control (nine) and cross-sectional (ten) designs were included in our project. The pooled overall random effect favored a statistically significant increased risk of Cryptosporidium infection in cancer patients compared with non-cancer individuals [OR = 3.3; 95% CI: 2.18-4.98]. The overall heterogeneity was medium (χ2 = 25.77; I2 = 30.2%, P = .11). The pooled ORs in case-control and cross-sectional studies were [OR = 5.60; 95% CI: 3.43-9.13; χ2 = 5.51; I2 = 0.00%, P = .70] and [OR = 2.08; 95% CI: 1.18-3.67; χ2 = 13.69; I2 = 34.3, P = .13], respectively. T-value and P-value were 0.54 and 0.57 based on the results of Harbord's modified's regression test. In summary, this meta-analysis demonstrates that Cryptosporidium infection is associated with cancer. Also, it found that study design and year of publication are the specific sources of heterogeneity. Further studies should be carried out to investigate the impact of Cryptosporidium infection in the onset or development of cancer in the future.

Short to Mid-term Outcomes of Single-stage Reconstruction of Multiligament Knee Injury.

BACKGROUND: Multiligament knee injury (MLKI) is a complex orthopedic injury leading to the tear of at least two of the major knee ligaments. However, there is no consensus on the optimal management of this debilitating condition. Regarding this, the present study was performed to evaluate the outcomes of single-stage multiligament reconstruction surgery in patients with MLKI. METHODS: This retrospective study was conducted on 41 consecutive MLKI patients who underwent surgical reconstruction. Objective evaluation of the outcome included active extension and flexion. Furthermore, the subjective evaluation of the outcome was accomplished using the Lysholm scoring scale and International Knee Documentation Committee (IKDC) form in Persian. Postoperative complications were also recorded for all patients. RESULTS: The mean age of the participants was 31.95±7.82 years. In addition, the mean follow-up period and the mean time interval between the injury and surgery were recorded as 36.9±17.8 and 11.5±8.9 months, respectively. The mean Lysholm and IKDC scores were obtained as 86.9±11.5 and 70±18.7, respectively. The mean Lysholm and IKDC scores were not statistically different between the patients who underwent surgery less than 6 months after the injury and those subjected to reconstruction 6 months postinjury (P=0.07 and P=0.3, respectively). Seven patients showed postoperative restricted range of motion, which was resolved with physiotherapy. The only surgical complication was popliteal artery injury. CONCLUSION: As the findings indicated, the single-stage reconstruction of MLKI provided an acceptable outcome. However, several aspects of this reconstruction, such as the timing of the surgery, still remain to be resolved in future investigations.

Effects of vitamin D optimization on quality of life of patients with fibromyalgia: A randomized controlled trial.

Background: Numerous studies have been conducted to evaluate the frequency of hypovitaminosis D in patients with fibromyalgia syndrome (FMS) and its association with FMS symptoms. This study aimed at assessing the effect of hypovitaminosis D on the symptoms and quality of life of patients with fibromyalgia. Methods: A total of 74 FMS patients with hypovitaminosis D were randomly assigned into group A (Trazodone 25 mg at bedtime + vitamin D 50 000 IU weekly) and group B (Trazodone 25 mg at bedtime + placebo). Serum vitamin D level, Widespread Pain Index (WPI), Fibromyalgia Impact Questionnaire (FIQ), Pittsburgh Sleep Quality Index (PSQI), and Short Form Health Survey (SF-36) were used at the beginning of the treatment and 4 and 8 weeks post treatment. Results: Significant improvements were observed in WPI, FIQ, and PSQI scores in both groups. Moreover, combination of vitamin D and Trazodone resulted in significant improvement of SF-36 scores compared to Trazodone therapy. Improvement in pain-related indices including the WPI and the physical component score (PCS) fraction of SF-36 was more noticeable in vitamin D/Trazodone combination therapy. Conclusion: This study suggests that vitamin D supplementation has significant therapeutic benefits in the management of FMS, especially in pain reduction of patients with fibromyalgia. According to our results, a combination of vitamin D supplements and a conventional antidepressant, when given to vitamin D-deficient fibromyalgia patients, could significantly improve both physical and psychological symptoms.

Association between Toxoplasma gondii exposure and paediatrics haematological malignancies: a case-control study.

The possible association between Toxoplasma gondii infection and paediatric haematological malignancies in a group of patients and control subjects was evaluated in the present study. We performed an age-, gender- and residence frequency-matched case-control study of 101 blood cancer patients under 18 years of age, all of which were treated in Amirkola Pediatric Hospital. One hundred and thirty-eight control samples were gathered from the outpatient clinic in the hospital. All cases and controls were tested for the presence of anti-Toxoplasma IgG antibodies and then IgG-positive subjects were evaluated for IgM antibodies by enzyme-linked immunoassays. Anti-T. gondii IgG antibodies were found in 37 (36.6%) of the cases and 12 (8.7%) subjects in the control group (odds ratio 6.07, 95% confidence interval 2.963-12.437, P < 0.0001). The median and interquartile range (IQR) of IgG titre from case group (7.7 (IQR 0.25-13.5)) was higher than the control (0.2 (IQR 0.1-0.5)) (P < 0.0001). The frequency of anti-T. gondii antibodies (IgG) in lymphoblastic leukaemia (acute lymphoblastic leukaemia), Hodgkin's lymphoma and T-cell lymphoma were 33 (31.9%), 3 (50%) and 1(100%), respectively. Anti-T. gondii IgM was not detected in the IgG-positive patients in case group. In the case subjects, no significant difference was seen in the positive rates of T. gondii infection between genders (37.3% in male; 35.7% in female; P = 0.52) and ages groups (P = 0.31). This study demonstrated that T. gondii infection is prevalent in children with blood cancer. It also showed that toxoplasmosis may possibly be linked with an increased risk of childhood haematologic malignancies. Furthermore, these results may be helpful in research on blood neoplasia aetiology.

Total Knee Arthroplasty for Chronic Anterior Knee Dislocation.

BACKGROUND: The occurrence of chronic knee dislocation is rare. To the best of our knowledge, total knee arthroplasty for treatment of chronic anterior knee dislocation has not been reported. METHOD: This report describes 3 cases of chronic anterior knee dislocation treated by total knee arthroplasty. RESULTS: Three female patients with chronic anterior knee dislocation were treated by hinged prosthesis total knee arthroplasty using the Insall rectus snip approach. At a mean of 17 months (range, 12-24 months) of follow-up, all patients showed a painless stable prosthesis and expressed satisfaction with the results. CONCLUSIONS: Total knee arthroplasty for chronic anterior knee dislocation is a challenging procedure. The Insall rectus snip approach with quadriceps release and constrained prosthesis is recommended.

Strongyloides stercoralis: detection of parasite-derived DNA in serum samples obtained from immunosuppressed patients.

Strongyloidiasis is an important neglected disease, which is life threatening in immunocompromised patients. This study aimed to evaluate the frequency of Strongyloides stercoralis infection among immunosuppressed subjects living in endemic communities by conventional PCR of the 18S rRNA and Cox1 genes to detect cell-free DNA in the patients' serum samples. Fresh stool and serum samples were obtained from participants. The stool samples were examined using parasitological methods. Total DNA was extracted from the serum samples and S. stercoralis larvae isolated from patient fecal samples. Conventional PCR to amplify a 101 bp fragment of the 18S rRNA gene was carried out for all extracted DNA, and then positive samples were further evaluated for a 121 bp fragment of the Cox1 gene. The PCR products of selected samples were sequenced and BLAST analysis was performed. Out of 120 patients, 57 and 63 cases had autoimmune disorders and cancer, respectively. The 101 bp fragments of the 18S rRNA were successfully amplified in 36 out of 120 (30%) serum samples. The PCR products of five samples were sequenced and compared with reference sequences in GenBank, which showed 97% identity and 90% coverage. In conclusion, to the best of our knowledge, this is the first molecular study for the detection of S. stercoralis cell-free DNA in human serum samples. These results provide useful insights for future studies and show that serum is an alternative specimen and may be useful in molecular diagnosis of diseases, particularly in immunosuppressive patients.