The non-classical class I human leukocyte antigen (HLA)-G molecule was found to be predominately expressed in the extravillous cytotrophoblasts at the fetal-maternal interface during pregnancy. This molecule is critically important for successful implantation during human pregnancy. The polymorphic insertion-deletion (indel) 14-base pair (bp) site localized at the 3' untranslated region was associated with HLA-G mRNA stability and isoform alternative splicing patterns, and thus may influence HLA-G function during pregnancy.

Ex-fissiparous planarians produce infertile cocoons or, in very rare cases, cocoons with very low fertility. Here, we describe the features of programmed cell death (PCD) occurring in the hyperplasic ovary of the ex-fissiparous freshwater planarian Dugesia arabica that may explain this infertility. Based on TEM results, we demonstrate a novel extensive co-clustering of cytoplasmic organelles, such as lysosomes and microtubules, and their fusion with autophagosomes during the early stage of oocyte cell death occurring through an autophagic pattern.

To add to our understanding of dendrocoelid spermatozoa and to describe additional phylogenetic characters, the ultrastructure of the testis was investigated in the subterranean freshwater planarian Dendrocoelum constrictum. This is the first study investigating spermatogenesis and spermatozoon ultrastructure in a subterranean freshwater planarian species. We found that the basic structure of spermatozoa in D. constrictum is similar to that of other Tricladida that have been studied previously. In fact, D.

Ceratomyxa hamour n. sp. was found to infect the gallbladder of the orange-spotted grouper, Epinephelus coioides located off the Saudi Arabian coast of the Arabian Gulf. The infection was reported as a free-floating spore in the bile, and pseudoplasmodia were not observed. Mature spores were crescent-shaped and measured on average 7m in length and 16m in thickness. The polar capsule, meanwhile, had length to width measurements of 4m and 3m on average.

A new Myxozoa, Kudoa quraishii n. sp., is reported in the striated muscle of the Indian mackerel Rastrelliger kanagurta from the Red Sea and the Arabian Gulf in Saudi Arabia. Mean prevalence of infection is about 20 % and varies between localities. The parasite develops whitish and oval or rounded pseudocysts of 0.2-3 mm in the striated muscles of the body. Pseudocysts are filled with mature spores. Myxospores are quadrate in shape in apical view with rounded edges and ovoid in side view. Each spore is formed by four equal shell valves and four symmetrical polar capsules.

تهدف هذه الدراسة إلى التعرف على واقع ممارسة مشرفي الجامعة للزيارة الصفية لطلبة التربية العملية في قسم التربية الخاصة بجامعة الملك سعود (قبل، اثناء، بعد) الزيارة الصفية من وجهة نظر طلبة التربية العملية، كما هدفت إلى التعرف على درجة اختلاف وجهات نظر طلاب التربية العملية في واقع الزيارة الصفية باختلاف متغيرات الدراسة (مسار الطالب، المعدل التراكمي). وبلغت عينة الدراسة (167) طالب وطالبة من طلبة التربية العملية في قسم التربية الخاصة خلال الفصل الدراسي الثاني من العام الدراسي 1435/1436هـ. وتوصلت الدراسة إلى ما يلي: