Comparative biochemical, parasitological, and histopathological studies on cystic echinococcosis in infected sheep

Rapid and accurate screening of cystic echinococcosis in sheep based on serum Fourier-transform infrared spectroscopy combined with machine learning algorithms

Cystic echinococcosis (CE) in sheep is a serious zoonotic parasitic disease caused by Echinococcus granulosus sensu stricto (s.s.). Presently, the screening technology for CE in sheep is time-consuming and inaccurate, and novel screening technology is urgently needed. In this work, we combined machine-learning algorithms with Fourier transform infrared (FT-IR) spectroscopy of serum to establish a quick and accurate screening approach for CE in sheep. Serum samples from 77 E. granulosus s.s.-infected sheep to 121 healthy control sheep were measured by FT-IR spectrometer. To optimize the classification accuracy of the serum FI-TR method for the E. granulosus s.s.-infected sheep and healthy control sheep, principal component analysis (PCA), linear discriminant analysis, and support vector machine (SVM) algorithms were used to analyze the data. Among all the bands, 1500-1700 cm^-1 band has the best classification effect; its diagnostic sensitivity, specificity, and accuracy of PCA-SVM were 100%, 95.74%, and 96.66%, respectively. The study showed that serum FT-IR spectroscopy combined with machine learning algorithms has great potential for rapid and accurate screening methods for the CE in sheep.

Cystic echinococcosis: Development of an intermediate host rabbit model for using in vaccination studies

The aims of this study were an establishment of the domestic rabbit as an intermediate host for cystic echinococcosis (CE) and to evaluate the potency of the crude germinal layer and the protoscoleces antigens to protect against the CE. Firstly; Two groups of white Newzeland rabbits were infected orally either by 5000 active oncospheres or viable protoscoleces separately. After 20 weeks, the slaughtered rabbits showed the presence of hydatid cysts at different internal organs. Molecular detection of the resulted cysts was conducted. Secondly; 27 rabbits were divided into nine groups (n = 3). Groups 1 and 2 were immunized with the crude germinal layer antigen while the groups 3 and 4 were immunized with the crude protoscoleces antigen. Groups 5 and 6 received the adjuvant mineral oil. Groups 7 and 8 were used as positive control. The last 9 group was kept as a negative control. The obtained results showed a significant high protection percentage of 83.4% and high antibody titer was recorded in groups that received the crude germinal layer antigen comparing with the groups that immunized with the crude protoscoleces antigen as their protection percentage was 66.7% with lower IgG response. In conclusion, the domestic rabbits could be used as a laboratory model for CE. Developing of the germinal layer antigen is more immunogenic than the protoscoleces one and could be used as a promising vaccine. Attention should be directed towards the existing rabbit in the environment adjacent to infected dogs as it could be a part of Echinococcus life cycle.

Vitis vinifera Extract Ameliorate Hepatic and Renal Dysfunction Induced by Dexamethasone in Albino Rats

This study was conducted to evaluate the biochemical effects of grape seed extract against dexamethasone-induced hepatic and renal dysfunction in a female albino rat. Twenty-eight adult female rats were divided randomly into four equal groups: Group 1: animals were injected subcutaneously with saline and consider as normal control one. Group 2: animals were injected subcutaneously with dexamethasone in a dose of 0.1 mg/kg body weight. Group 3: animals were injected subcutaneously with 0.1 mg/kg body weight of dexamethasone, and then treated with a grape seed extract in a dose of 200 mg/kg body weight by oral gavage. Group 4: animals were injected subcutaneously with 0.1 mg/kg body weight of dexamethasone, and then treated with a grape seed extract in a dose of 400 mg/kg body weight by oral gavage. After 4 weeks, serum alanine aminotransferase (ALT), aspartate aminotransferase (AST) activities, albumin, uric acid, creatinine, and glucose levels were assayed. Hepatic reduced glutathione (GSH), total protein content, and catalase and glucose-6-phosphate dehydrogenase activities were also assayed. Dexamethasone administration caused elevation of serum levels of glucose, uric acid, creatinine, ALT, AST activities, and a decrease in other parameters such as hepatic glutathione, total protein levels, and catalase enzyme activity. Treatment with Vitis vinifera L. seed extract showed a significant increase in the body weight of rats in the group treated with Vitis vinifera L. seed extract orally compared with the dexamethasone control group. An increase in GSH and catalase activity in response to oral treatment with Vitis vinifera L. seed extract was observed after treatment. Grape seed extract positively affects glucocorticoid-induced hepatic and renal alteration in albino rats.