Histological Feature of Uterus and Uterine Tube During Late Period of Pregnancy in Rabbits

Current work was conducted to investigate the histological architecture of the uterine tube and uterus during the period of late pregnancy in rabbits. Twelve adult local breed rabbits were used. The samples from different parts of the uterine tube were prepared for histological study after staining with H&E, Masson’s trichrome and combine Alcian blue (pH2.5)-PAS. The pre ampulla was a narrow tube and its tunica mucosa had slightly long simple mucosal folds lined by pseudostratified columnar epithelium, the ampulla had a wide lumen and its tunica mucosa displayed several highly tall branched mucosal folds with few short simple folds while the isthmus was the narrowest region and its tunica mucosa displayed few of tall and short simple mucosal folds. The mucosa of three parts of the uterine tube was lined by pseudostratified columnar epithelium which is composed of three types of cells: mucous secretory cells, non-secretory cells and basal cells, the mucous secretory cells were the predominant type and revealed secretory activities. The lamina propria-submucosa of the uterine tube was composed of cellular connective tissue and tunica muscularis. The uterus had a very thick wall with well-recognized endometrium and myometrium, the endometrium was composed of many-branched and simple endometrial folds that were covered by multinucleated syncytial cells and simple cuboidal epithelial cells. Lamina propria was composed of loose connective tissue had scattered groups of well growing simple uterine glands that showed secretory activities. The current result showed that the uterus during the late period of pregnancy was differed from those of non-pregnant rabbits, while the uterine tube at late pregnancy has a structure that appeared prepared for the next physiological period.

A Rare case of Menetrier’s disease presenting with Protein Losing Gastropathy Mimicking Carcinoma Stomach

Ménétrier's disease (MD) (also known as giant hypertrophic gastritis or hypoproteinemic hypertrophic gastropathy) is a rare premalignant entity characterized by markedly hypertrophied mucosal folds of the fundus and the gastric corpus typically associated with , hypochlorhydria, protein losing enteropathy causing hypoalbuminemia and anemia. However, the natural history of MD in adults remains unclear and is rarely reported in the literature. Its constellation of classic symptoms includes nausea, vomiting, abdominal pain and peripheral edema, and it is associated with increased risk of gastric cancer. Nevertheless, its pathophysiology is not yet fully understood and clinical and endoscopic diagnosis can be difficult to establish. Malignant transformation in MD should not be overlooked, and regular monitoring of the gastric mucosa via endoscopy is necessary.

ULTRASTRUCTURAL STUDY OF THE ESOPHAGUS AND STOMACH OF Arapaima gigas (Schinz, 1822), JUVENILE PAICHE, CREATED EXCAVATED TANK

Paiche ( Arapaima gigas) belongs to the Kingdom Animalia , Phylum Chordata , Class Actinopterygii , Order Osteoglossiformes, Family Arapaimidae, Genus Arapaima, and its origin may date to the Jurassic period. The species has natural habitat in the Amazonian rivers, found mainly in marginal lakes, being considered an important fishing resource, with high market value and high demand for meat and leather in both Brazilian and international trade. This study aims to describe the morphology of the esophagus and stomach by light microscopy and scanning electronics microscopy. The esophagus was presented as muscular, short, tubular and fan-shaped in the cranial portion, also presenting deep longitudinal folds, and the entire mucosa is covered by mucus secretory cells with distinct morphological characteristics. Pirarurcu’s stomach has a J-shape divided into three regions: cardiac with a lighter aspect, fundus portion with few folds in the mucosa, and pyloric with deeper folds, also presenting gastroliths in fundus and pyloric portions. Both microscopy studies highlighted three glandular regions, composed by mucoid columnar epithelial cells, gastric crypts with different shapes and sizes depending on each portion, in which the different shapes of the mucosal folds in each region of the stomach were evident, and digitiform microsaliences were found in the cardiac region, and micro-orifices and desmosome in the fundus region. Also, fundus and pyloric portions produce more mucus than the cardiac. Then morphology found was consistent with the eating habits and management of distinct characteristics of the digestive tract.

Developmental events and cellular changes occurred during esophageal development of quail embryos

The current study focused on the histogenesis of the esophagus in quail embryos. Formation of the gut tube occurred on the 4th day of incubation. Development of the muscular layers occurred in a sequential manner; the inner circular layer on the 7th day, the outer longitudinal layer on the 8th day and the muscularis mucosae on the 9th day. Glandular development began on the 13th day of incubation. The epithelium was pseudostratified columnar that consisted of mucous cells, dendritic cells, and keratinocyte precursors. Epithelial stratification occurred on the 15th day of incubation. We used Mallory trichrome, Weigert-Van Gieson, and Gomori silver stains to visualize fibrous components. Scanned samples showed formation of endoderm and mesoderm on the 5th day of incubation. A layer of myoblasts developed on the 8th day of incubation. Formation of mucosal folds, which contained glandular openings, occurred on the 14th to 17th days of incubation. On the 5th to 8th days of incubation, CD34 and vascular endothelial growth factor (VEGF) positive-mesodermal cells, and telocytes (TCs) were detected. On the 15th day of incubation, CD34 and VEGF positive-telocytes, and fibroblasts, were identified. The current study described the correlations between functional morphology and evolutionary biology.

Vaping-associated esophagitis

Background Vaping, or e-cigarettes, heat nicotine and other chemicals to create a vapor that is inhaled. The practice has gained rapid popularity with 41 million people globally reporting regular or occasional use. Although tobacco smoking is well-known to increase esophageal acid exposure by augmenting the number of reflux events, the effects of vaping on the gastrointestinal tract have not yet been elucidated. Our objective is to report a case of severe esophagitis associated with vaping, which is the first in the literature to our knowledge. Case presentation A 25-year-old male with a history of well-controlled gastro-esophageal reflux disease presented to the emergency room for evaluation of one week of severe odynophagia. He had been treated with a proton-pump inhibitor for several years with good effect. Approximately two months prior to presentation, he started vaping tetrahydrocannabinol and nicotine with recent heavy daily use. He denied any alcohol or non-steroidal anti-inflammatory drug use. We performed esophagogastroduodenoscopy that revealed Los Angeles Grade C esophagitis (involving ≥ 1 mucosal breaks continuous between tops of ≥ 2 mucosal folds, < 75% circumferential). Histopathological analysis of esophageal biopsies demonstrated granulation tissue with acute and chronic inflammation. Periodic acid-Schiff-diastase staining was negative and immunohistochemical stains for herpes simplex virus and cytomegalovirus were negative. There was no evidence of eosinophilic esophagitis. We treated him with intravenous PPI and analgesics until he was able to tolerate oral intake. He was counseled extensively on vaping cessation and reported complete resolution of symptoms after 2 months. Conclusion This patient’s presentation illustrates a serious gastrointestinal consequence of vaping, the long-term consequences of which warrant additional studies. Like smoking, the mechanism of injury in vaping may be, at least in part, due to the effects of nicotine. As prevalence of vaping continues to rise, clinicians should be aware of this complication and carefully solicit a patient’s vaping history as a simple denial of “smoking” can be misleading.

Ménétrier-like disease in a Pointer with concurrent granulomatous gastritis, helicobacteriosis and leishmaniosis: a case report

Background Ménétrier-like disease is a rare hypertrophic canine gastropathy, reported in only seven dogs. Clinical signs are vomiting, anorexia and weight loss. Macroscopically, giant cerebriform gastric mucosal folds are typically seen in the corpus and fundus of the stomach. Histopathologically, fundic mucous cell hyperplasia and loss of parietal and chief cells are typical. Case presentation A nine-year-old spayed female Pointer had a history of intermittent vomiting, marked weight loss and hypoalbuminaemia. A gastroduodenoscopy was performed three times within three months with macroscopic changes remaining the same. The gastric mucosa of the corpus, fundus and proximal antrum was markedly irregular, with cerebriform mucosal folds. In the first gastric biopsies, histopathology revealed a moderate granulomatous gastritis, with a severe manifestation of Helicobacter-like organisms. Treatment for Helicobacter spp. decreased the vomiting slightly. The dog was diagnosed with concurrent leishmaniosis; the conventional anti-Leishmania treatment decreased the vomiting moderately, the hypoalbuminaemia resolved and the dog gained weight back to a normal body condition. Granulomatous gastritis was not present in the gastric biopsies after these treatments. The dog increased vomiting when palliative treatment (maropitant citrate, ondansetron and esomeprazole) was discontinued, and thus, full-thickness biopsies of the stomach were taken and Ménétrier-like disease was diagnosed. The affected area was too large to be surgically removed; thus, palliative treatment was reinstated. The dog remained clinically well 39 months after the first clinical presentation. Conclusions This is the first report of Ménétrier-like disease in a dog with a simultaneous manifestation of granulomatous gastritis, helicobacteriosis and leishmaniosis. The clinical signs decreased after treatment of helicobacteriosis and leishmaniosis, but vomiting remained probably as a sign of Ménétrier-like disease. Treatment options for dogs are surgical removal of the abnormal area or palliative treatment. In humans, promising results for a cure have been shown with cetuximab treatment, a human monoclonal antibody, but no canine antibody is commercially available yet. The dog here was doing well 39 months after first presentation, which is the longest reported survival time for Ménétrier-like disease with only palliative treatment in dogs. Full-thickness biopsies are preferred in macroscopic hypertrophic lesions of the stomach for better assessment of Ménétrier-like disease.

Effect of Zinc Sulphate (ZnSO4) on the Gall Bladder of Clarias batrachus (Linn. 1758)

Heavy metal exposure to biota has become a severe thread to the environment, as its bioaccumulation, toxicity and persistence is happing at an alarming rate. Heavy metal presence in water bodies has been reported by various researchers. Henceforth their exposure to aquatic organisms is certain. An investigation on the possible toxicological impact of Zinc sulphate on fish Clarias batrachus is carried out in laboratory. Histology of gall bladder was used as a marker for evaluation of toxicity after sub lethal exposure. Fish were exposed to sub-lethal concentrations of 5mg/L, 10mg/L and 15mg/L for 20 days. Simultaneous control was also maintained. Principle histological alterations were deformities in the normal structures of columnar epithelial line, muscular layer, and mucosal folds. 15mg/L and 20mg/L exposure of zinc sulphate altered the sub mucosa besides leading the formation of bile crystals, an indication of water loss. The severity of histopathology was exposure dependent. Histopathological alteration in gall bladder can be regarded as sensitive biomarkers of Zinc sulphate toxicological manifestations hence can be utilized for ecotoxicological biomonitoring of aquatic bodies.

Gross and Histopathology of Goats Feeding on Opuntia stricta in Laikipia County, Kenya

Various plant species such as Opuntia stricta have developed defensive measures, namely, spines, thorns, and other sharp pointed structures to protect themselves from herbivores and other animals feeding on them. Opuntia stricta has invaded the northern part of Laikipia County, Kenya, and its fruits are protected by small spines called glochids. This study determined the pathology in goats feeding on this plant in Laikipia County. Eighteen goats that had eaten the plant and six others that were raised in a ranch without O. stricta were purchased for the study. All study animals were clinically examined for lesions and euthanized for necropsy examination. Clinically, goats affected by O. stricta had poor body condition, wounds on various body parts, and diarrhea. Variable numbers of O. stricta spines occurred externally on the skin throughout the body and elicited pain, swelling, and ulcerative wounds on affected parts. Internal lesions were observed in subcutaneous tissues (100%), together with stomatitis, cheilitis, gingivitis, glossitis, abomasitis (100%), rumen, reticulum, omasum thinning and loss of papillae (72.2%), esophagitis, and duodenitis (5.6%). Carcasses had gelatinous fat and muscular atrophy. Other gross lesions were generalized viscera atrophy, edema, subcutaneous emphysema, lymphadenopathy, abscesses, ascites, hydrothorax, and hydropericardium. The abomasum wall and its mucosal folds were swollen with edema, haemorrhages, and scattered foci of abscesses. Histopathology confirmed the main lesions in all affected goats were foreign-body granulomas which were located in all organs with gross lesions. Goats from O. stricta-free ranches had no spines or lesions. The pathological effects caused by O. stricta resulted in emaciated goats due to pain, inability to masticate and assimilate food, and stress, resulting in poor carcass and organs quality and possible condemnation and death. This could affect the socioeconomics and livelihoods of communities in the study area, and therefore, the spread of this plant needs to be controlled.

Histoarchitectural and Histoenzymatic Studies on Gizzard of Guinea Fowl (Numida meleagris)

Background: The gizzard is a muscular stomach of the Gastrointestinal tract of bird that holds sparing crystals which aids as the mechanical multure component for food material to be ingested by birds. Its specialty is to grinding of ingested food material after secretion of HCL (Hydrochloric Acid) and pepsinogen enzymes in the proventriculus. Methods: The twelve samples of gizzard of guinea fowl were fixed in 10% NBF (Neutral buffered formalin) and Bouin’s fluid for histological while chilled acetone and chilled ethanol for histochemical studies. The fresh unfixed tissues were used for the cryostat section for the demonstration of different enzymes.Result: The tubular glands were main feature of mucosal layer but sometime acinar glands also found as the replacement of tubular glands with lymphoid aggregation. The horizontal koilin was also noticed between long mucosal folds. Tunica submucosa was discovered in squeezed manner in comparison to the mucosa. The tunica muscularis has shown inner circular and outer longitudinal as the thick layer. It was intermingling with collagen and elastic fibers. Histochemically the gizzard was examined for glycogen, alkaline phosphatase, acid phosphatase and succinic dehydrogenase.

Histological and Histometrical Features of the Mammary Gland in Immature and Lactating Local Breed Ewes (Ovis aries)

Twelve samples of mammary glands (6 immature and 6 lactating ewes) were used for this study. Specimens of glands were immediately dissected and fixed in 10% formalin sol. The specimens were processed according to paraffin technique, sectioned at 5-6µm and stained by hematoxylin and eosin, Masson's Trichrom stains. In both immature and lactating ewes the mammary glands were covered by skin. In immature ewes the mammary quarter was composed of few mammary lobes that separated by very thick inter lobar adipose tissue. The lactating quarter was composed of huge mammary lobes and lobules without adipose tissue. In immature the lobe was consisted of few small lobules that composed of few of mammary alveoli while the lactating lobes had large sizes lobules and each had large alveoli which lined by tall cuboidal cells and supported by fibrous tissue and myo epithelial cells. In both immature and lactating ewes, the gland and teat cisternae were showed many of mucosal folds which lined by pseudo stratified columnar epithelium and supported by fibrous connective tissue. The teat cisterna of both immature and lactating was composed three layers; mucosal cisterna, fibro muscular layer and skin. The teat canal was lined by pseudo stratified squamous epithelium and the sub epithelial connective tissue showed well developed venous sinus and fibro muscular. Statistical analysis was revealed significant differences between the values of all parameters of immature and lactating ewes. Apparent surface areas of the lobe in immature and lactating were 122143.063±23.21 µm2 & 992541.188±33.81 µm2 respectively. Surface areas of lobule in immature and lactating were 1042.938±21.02 µm2 & 91565.977±25.60 µm2 respectively. Surface areas of alveoli in immature and lactating were 994.238±11.39 µm2 & 4584.270±19.26 µm2 respectively. Epithelial heights of alveoli in immature and lactating were 10.290±1.01 µm & 23.012±2.81 µm respectively. Thickness of inter lobar tissue in immature and lactating ewes 677.393±23.67 µm and 361.401±10.86 µm respectively. Thickness of inter lobular connective tissue in immature and lactating were 112.969±±11.48 µm and 90.281±9.81 µm respectively.