Focal Coagulative Necrosis Research Articles

Injection-Site Sarcoma in Three Village Weaver Birds (Ploceus cucullatus) Associated with Autogenous Yersinia pseudotuberculosis Vaccination

Post-vaccinal sarcomas have been reported in cats and rarely in other domestic mammals, but not in birds. Three village weaver birds (Ploceus cucullatus) presented with poor flying ability and abnormal wing carriage attributable to large, unilateral pectoral masses. All had received at least one dose of autogenous Yersinia pseudotuberculosis vaccine into the affected pectoral muscle 74-408 days previously. Following euthanasia, gross post-mortem examination revealed locally invasive subcutaneous tumours extending through the sternum into the coelomic cavity. Cytology and histology revealed neoplasms of pleomorphic spindloid neoplastic cells with foci of coagulative necrosis and cavitation, sometimes containing faintly refractile non-polarizing granular material, both extracellularly and after phagocytosis by surrounding cells, including multinucleated giant cells. Immunohistochemistry in one bird supported a striated muscle cell origin. Findings of anaplastic sarcoma with intralesional foreign crystalline material resembled typical injection-site sarcomas in cats. This is the first report of presumptive vaccine-associated sarcoma in a non-mammalian species.

Inflammatory Profiles of Tracheal Biopsies From SARS-CoV-2 Patients.

PurposeAn increasing number of laryngotracheal complications in mechanically ventilated COVID-19 patients has been reported in the last few months. Many etiopathogenetic hypotheses were proposed but no clear explanation of these complications was identified. In this paper we evaluated the possibility that the tracheal mucosa could be a high viral replication site that could weaken the epithelium itself.MethodsSubjects for the COVID-19 group and the control group were selected retrospectively according to specific criteria. Patients’ basic and clinical data were recorded and analyzed. Tracheal samples of both groups were collected during surgical tracheostomies and then analyzed from a histological and genetic-transcriptional point of view.ResultsFour COVID-19 patients were enrolled in this study and compared with four non-COVID-19 patients. No laryngotracheal complications were identified in both groups. The SARS-CoV-2 was detected in one out of four COVID-19 samples. A subepithelial inflammatory lymphomonocyte infiltrate was observed in all patients but two cases of the COVID-19 group showed vasculitis of small subepithelial vessels associated with foci of coagulative necrosis. Two gene sets (HALLMARK_INFLAMMATORY_RESPONSE and HALLMARK_ESTROGEN_RESPONSE_LATE) were significantly deregulated in COVID-19 patients compared to the control group.ConclusionThe altered inflammatory response of the COVID-19 patients could be another possible explanation of the increasing number of laryngotracheal complications.

Ameliorative effect of tocotrienol and selenium yeast against the adverse effect of florfenicol in broilers’ liver

The prolonged use of florfenicol can lead to detrimental side effects in poultry. This work focuses on the role of tocotrienol and selenium yeast to mitigate the adverse effects of florfenicol in broilers’ liver. One hundred and fifty, one-day-old Cobb broiler chicks where equally divided in 5 experimental groups according to the following experimental design: Group (1) control group chicks fed to a balanced diet only. Group (2) Chicks treated with florfenicol (20 mg/kg b.w.) per bird for 3 successive days and the florfenicol was administered in other groups by the same dose and for the same period of time. Group (3) chicks treated with florfenicol and tocotrienol (170 mg/kg b.w.) for 7 successive days. Group (4) Chicks treated with florfenicol and selenium yeast (0.15mg /kg b.w., on feed) for 7 successive days. Group (5) Chicks treated with a combination of florfenicol, tocotrienol and selenium yeast. Chickens treated with florfenicol exhibited an increased level in hepatic malondialdehyde (MDA), as well asa decreasedlevel in hepatic superoxide dismutase (SOD) and reduced glutathione (GSH). Tocotrienol and selenium yeast decreased the MDA and increased SOD and GSH in hepatic tissue as well as return ALP, cholesterol, triglyceride and VLDL to their normal levels. Treated chicks with tocotrienol returned serum (ALT) to normal activity but serum total protein and albumin levels were increased. Theselenium yeast treated groups showed an increase of serum total globulin. Histopathologically, florfenicol treated group had focal hepatic leukocytic infiltration and focal coagulative necrosis of hepatocytes but chickens with the combination of tocotrienol and selenium yeast had activated Kupffer cells and revealed less evident necrotic changes in liver. In conclusion, tocotrienol and selenium yeast administrated alone or in combination highlightedimproved antioxidant effects and mitigated the lipid peroxidation in broilers’ liver treated with florfenicol. Thus, tocotrienol and selenium yeastcan improve the safety of using florfenicol in broiler chickens under experimental conditions.

Elevated level of microRNA-210 at the initiation of muscular regeneration in acetic acid-induced non-ischemic skeletal muscular injury in mice.

The alteration in microRNA-210 level, a hypoxia-inducible microRNA, is not well known in non-ischemic tissue injury. In this study, we characterized the histopathological time course of acetic acid-induced skeletal muscle injury as a non-ischemic tissue injury model and investigated the expression of microRNA-210, hypoxia-inducible factor 1α, and growth factors using quantitative polymerase chain reaction analysis. After a single intramuscular dose of 3% (v/v) acetic acid to C57BL/6J mice, focal coagulative necrosis of muscle fibers was noted from 3 h after dosing and infiltration of F4/80 and Galectin-3 positive M2 macrophage was noted at 1 d after dosing. Muscular regeneration was initiated from 3 d, when M2 macrophage infiltration was most prominent, till 14 d after dosing. Hif1α and Hgf expression increased from 3 h onwards, and microRNA-210 level increased after 3 d after the treatment. However, no clear elevation in the levels of Igf1 or Vegf was observed. The infiltrative macrophages and regenerative muscle fibers were positive for hypoxia-inducible factor 1α, microRNA-210, and hepatocyte growth factor as assessed by immunohistochemistry or in situ hybridization. In this study, dominant infiltration of M2 macrophages at muscular necrosis and subsequent regeneration after a single intramuscular injection of acetic acid in mice were observed. The increase in hif1α level was observed just after the muscular injury in this non-ischemic tissue injury model, and the elevation in microRNA-210 level was noted at the initiation of tissue regeneration, indicating its effects on tissue protection and repair.

HISTOLOGICAL CHANGES OF ADRENAL GLAND IN RABBITS DURING THE EXPERIMENTAL INFECTION WITH TRYPANOSOMA EVANSI AND AFTER TREATMENT WITH NAGANOL

The structural – functional changes in the adrenal glands associated with experimental infection with Trypanosoma evansi and the reversed changes after the treatment of rabbits with anti-trypanosomal drugs (Naganol, Bayer, 205) were studied. Thirty adult New Zealand male rabbits were divided into two groups: control group which include 12 rabbits while the infected group include 13 rabbits. Rabbits of infected group were injected I. V with 10 trypanosoma on 0.2 ml mice blood diluted with AL -sever's solution while rabbits of control group were injected with trypansoma free diluted mice blood. Forty-two days after infection the infected group were treated with neganol 10% sol. (20mg/ kg B.W, i.v) than all the rabbits were killed after 42 days of treatment. Microscopic examination of the hematoxylin-eosin stained adrenal gland revealed occurrence of degenerative changes of the zona fosciculata-reticulaties infltration of mononuclear cells, red blood cells and focal coagulative necrosis in both zone when compared with those of the control group, while treated group showed focal regeneration of secretort cells of both zone. It is concluded there were revers of structural-functional changes after treatment to the normal state.

Fibrosarcoma in Rottweiler dog: case report

The present study aims to report a case of fibrosarcoma in an elderly canine patient who underwent necroscopic examination in June 2018 after natural death. Macroscopic and microscopic analyzes of the pathological findings were performed by organ visualization and histopathological processing of the collected samples. Macroscopically, a pelvic tumor mass of approximately 15 cm, cardiac hypertrophy with parasites in the ventricular lumen, congested and nodular lungs, hepatomegaly and renal atrophy were observed. Histological analysis of the primary tumor mass was compatible with a fibrosarcoma, with most cells of fusiform morphology, with foci of hemorrhage and necrosis in the center of the tumor, alternating with regions of desmoplastic reaction, nuclear atypia and prominent nucleoli. Also, microscopy revealed swollen pulmonary parenchyma with diffuse hemorrhage, vascular congestion, thickening of the alveolar septa and pulmonary nodules suggestive of metastatic lesions, as well as liver with congested sinus capillaries and diffuse hemorrhage in the hepatic parenchyma with foci of coagulation necrosis. Fibrosarcoma is a tumor of mesenchymal origin, composed of transformed fibroblasts, in a collagen background. It occurs in all species, but is more common in dogs and cats. In dogs, it usually manifests in solitary form and in older individuals, with a mean age of 9.7 years. Most pathologists describe the histological picture of fibrosarcoma as a fishbone pattern. It is usually a very invasive tumor, making surgical treatment difficult because it does not allow a wide margin of excision, and its clinic manifests itself late, making diagnosis and treatment even more difficult, as in the case reported here, in which the patient suddenly died. Thus, histopathological and cytopathological analysis remain the gold standard among the initial diagnostic methods to confirm the presence of the tumor, highlighting the importance of applying these study methods in determining the morphological characteristics of different types of lesions, as well as their forms, whose diagnosis can be confirmed with other diagnostic methods.

SAT-195 The Diagnosis and Management of a Functional Paravertebral Paraganglioma

A 32-year-old male presented with a 4-year history of palpitations, diaphoresis, and orthostatic hypotension. One year prior to presentation, he began experiencing severe, episodic headaches and neck pressure. Neurological work-up included an MRI head, neck, and spine, identifying a left posterior mediastinal lesion adjacent to the T5 vertebral body, approximately 2.4 x 2.0 cm. A community surgical center attempted mass resection via Video -assisted (VATS) approach. Resection was aborted intraoperatively due to a hypertensive crisis following lesion manipulation, with his systolic blood pressure increasing above 325 mmHg.Subsequent evaluation revealed a 24-hour urine norepinephrine of 6117 nmol/d (normal <575) and normetanephrines of 16.6 umol/d (normal <3.4). An MIBG study showed intense tracer avidity in the left paraspinal lesion and minimal uptake in the adrenal glands.A functional paravertebral paraganglioma was diagnosed and the patient was initiated on alpha and beta-blockade in preparation for staged combined treatment.Spinal angiography was performed to define the arterial supply of spinal cord and tumor, which confirmed a hypervascular left thoracic paraspinal tumor. Arterial supply emanated from the left T4 intercostal and left supreme intercostal arteries and a prominent draining vein was present. Trans-arterial particle embolization was performed via both arteries with minimal residual tumor blush present post procedure.Successful VATS excision of the tumor was completed one week after arterial embolization with minimal blood loss. Pathology of the resected tumor revealed an overall intact tumor that stained diffusely positive with synaptophysin and sustentacular cells highlighted by S100 protein with a few foci of coagulative necrosis.Episodes of hypertension (maximum BP 210/80) occurred during embolization and surgical resection with vascular manipulation. These were managed with intraoperative nitroprusside and phentolamine. Peri-procedural plasma metanephrine and cathecholamine levels were collected. Normetanephrine levels (normal <=0.89 nmol/L) were 4.66 before embolization, >6.25 after embolization, 3.70 the day after embolization, 4.10 before VATS, and 0.69 after VATS. Norepinephrine levels (normal 0.8–3.4 nmol/L) were 24.3, 111.7, 61.1, 19.6, and 4 respectively. Genetic testing showed no hereditary predisposition.Discussion:Functional neuroendocrine tumours may be difficult to diagnose due to the wide variety of clinical presentations and must be considered when investigating a vascular mediastinal tumor. In our case, pre-operative embolization did not normalise plasma catecholamine levels, likely from incomplete arterial embolization, but helped reduce intra-operative surgical bleeding risk. Alpha- and beta-blockade should be continued until surgical resection, with dose adjustment as required.

Histotripsy in collagenous tendons.

Tendon injuries comprise 45% of the 66 million musculoskeletal injuries each year with annual costs of $114 billion. Conservative therapies to treat injured tendon produce mixed success rates. Histotripsy is a high intensity focused ultrasound modality that creates and oscillates bubbles to fractionate soft tissues in a well-defined focal volume; however, highly collagenous tissues like tendon have proven resistant to histotripsy. The goal here is to explore acoustic parameters for mechanical fractionation of tendons. Large animal Achilles tendons were exposed to HIFU at 1.07-3.68 MHz with 0.005-20 ms pulses repeated at 1-1000 Hz for 15-60 s with acoustic pressures up to p+ = 97 MPa, p- = 27 MPa. A Verasonics research ultrasound imaging system and ATL L7-4 transducer was used to monitor bubble activity during exposure. Tendon samples were fixated and stained with Hematoxylin and Eosin (H&E) for cellular morphology analysis and alpha-nicotinamide dinucleotide diaphorase (αNADH-d) for enzymatic activity analysis. Results showed successful bubble creation in the focal region; however, only 1/90 samples showed focal coagulative necrosis histologically. Future work involves an evaluation of whether bubbles are of insufficient size or collapse strength to mechanically fractionate tendon. [Work supported by Penn State Seed Grant, NIH EB027886, and NSF DGE1255832].

Novel SRF-ICA1L Fusions in Cellular Myoid Neoplasms With Potential For Malignant Behavior.

Pericytic tumors comprise a histologic continuum of neoplasms with perivascular myoid differentiation, which includes glomus tumors, myopericytoma, myofibroma, and angioleiomyoma. Despite their morphologic overlap, recent data suggest a dichotomy in their genetic signatures, including recurrent NOTCH gene fusions in glomus tumors and PDGFRB mutations in myofibromas and myopericytomas. Moreover, SRF-RELA fusions have been described in a subset of cellular variants of myofibroma and myopericytoma showing myogenic differentiation. Triggered by an index case of an unclassified cellular myoid tumor showing a novel SRF-ICA1L fusion we have investigated our files for cases showing similar histology and screened them using a combined approach of targeted RNA sequencing and fluorescence in situ hybridization. A fusion between SRF exon 4 and ICA1L exon 10 or 11 was identified in a total of 4 spindle cell tumors with similar clinicopathologic features. Clinically, the tumors were deep-seated and originated in the trunk or proximal lower extremity of adult patients (age range: 23 to 55 y). Histologically, the tumors were composed of cellular fascicles of monomorphic eosinophilic spindle cells showing increased mitotic activity, harboring densely hyalinized stroma, often with focal areas of necrosis. All 4 tumors had similar immunoprofiles with positivity for smooth muscle actin, calponin, and smooth muscle myosin heavy chain. Tumors were negative for desmin and caldesmon, markers often seen in SRF-RELA-positive tumors with similar morphology. Follow-up information was available in 3 patients. Two patients had no evidence of disease, 2 and 5 years after surgical resection. One patient, a 35-year-old male patient with a 19 cm deep-seated tumor with brisk mitotic activity (>20 mitoses in 10 HPF), developed lung metastases 7 years after initial diagnosis. In summary, we report a series of 4 cellular myoid tumors with novel SRF-ICA1L gene fusions, characterized by bland spindle cell fascicular growth, expression of specific smooth muscle markers, elevated mitotic activity, marked stromal hyalinization, focal coagulative necrosis, and potential for malignant behavior. Given the morphologic overlap with related cellular myopericytic tumors with SRF-RELA fusions, it is likely that SRF-ICA1L fusions define a similar subset of neoplasms composed of immature smooth muscle cells.

Prevalence and pathological evaluation of hepatic fatty change in cattle slaughtered at Urmia Abattoir, Northwest Iran

Three hundred and sixteen bovine livers were inspected during slaughtering at Urmia Abattoir in May 2016. Eighty-nine inspected livers have various gross and microscopic lesions. 89 hepatic tissue samples were processed routinely and stained by Harris Hematoxylin and Eosin (H&E), Periodic Acid- Schiff reagent (PAS) and Sudan IV for frozen sections. Hepatic lesions were observed in 89 samples (28.16%) of 316 liver samples. lesions in the inspected cattle were consisted 33/316 (10.44%) fatty change, 40/316 (12.65%) fascioliasis, 8/316 (2.53%) hydatid cyst, 6/316 (1.89%) focal coagulative necrosis and 2/316 (0.63%) hemorrhage. The results show that abundance of hepatic fatty change in male cattle is more than females. Indeed, abundance of mild type of hepatic fatty change 15/33 (45.45%) is more than moderate type 11/33 (33.33%) and severe type 7/33 (21.21%). According to presence of hepatic fatty change in most livers affected by fascioliasis, it seems fascioliasis may be a cause of hepatic fatty change in cattle slaughtered at Urmia Abattoir.

M1/M2-macrophage Polarization-based Hepatotoxicity in d-galactosamine-induced Acute Liver Injury in Rats.

d-galactosamine (d-GalN) is a well-known hepatotoxic agent that causes liver injury. Conversely, hepatic macrophages play a crucial role in maintaining liver tissue integrity. Macrophage functions were investigated in hepatic lesions induced by a single intraperitoneal injection of d-GalN (800 mg/kg body weight [BW]) in 6-week-old F344 rats. Blood and liver samples were examined at 8 hr and on 1, 2, 3, and 5 days postsingle injection (PSI). Hepatic lesions consisting of degeneration/sporadic foci of coagulation necrosis, inflammatory cell reaction, and reparative fibrosis were seen on PSI days 1 and 2, reflected by significantly increased serum levels of aspartate transaminase and alanine transaminase and upregulation of CD68 M1 (tumor necrosis factor-α, interleukin [IL]-6, and interferon-γ) and CD163 M2 (transforming growth factor-β1, IL-10, monocyte chemoattractant protein-1, and IL-4) macrophage-related factors. Double immunofluorescence staining on PSI day 2 demonstrated that 82% of hepatic macrophages expressed of CD163/CD68 simultaneously; 65-75% of MHC class II macrophages showed co-expression of CD163 or CD68 and 95% CD204-expressing macrophages reacted to CD163 or CD68. These findings showed that both M1- and M2-macrophages contributed to the development of hepatic lesions induced by d-GalN and provided information about macrophage activation, indicating the importance of analysis of macrophage phenotypes for hepatotoxicity based on M1/M2-polarization.

Clinico-pathological studies on black quarter in cattle

The present study was conducted on 42 clinical cases of black quarter in cattle to study the haemato-biochemical, gross and histopathological changes. The haemato-biochemical changes observed in affected animals included significant increase in absolute granulocyte count, serum glutamic oxaloacetic transaminase and creatinine kinase as compared to healthy control indicating muscular damage. The gross lesions were excessive bloated appearance of carcass immediately after death along with crepitating or non-crepitating swelling primarily at different sites viz. hind quarter, shoulder and neck region etc. On incision, the swelling showed oozing of dark red fluid with bubbles with rancid odour. The affected muscles were dark red in colour with sponge like appearance frequently with presence of gas bubbles indicating necrotizing hemorrhagic myositis. The spleen was frequently moderately enlarged and showed mushy appearance. The important histopathological lesions observed in affected skeletal muscles were extensive haemorrhages and marked inflammatory response predominantly containing neutrophilic infiltration in spaces between muscle fibers indicating haemorrhagic necrotizing myositis leading to architectural disruption of myofibrils. Focal coagulative necrosis of muscle bundles also observed. Frequently, many empty spaces within muscle bundles were evident indicating presence of gas bubbles (emphysema) and edema. In conclusion, the findings like granulocytosis, lymphocytopenia, anemia, elevated levels of serum glutamic oxaloacetic transaminase and creatinine kinase can be used as marker hemato-biochmical parameters for preliminary clinical diagnosis of black quarter in conjunction with other important parameters like clinical signs, conventional and molecular techniques for detection of causative agent, gross and histopathological changes.

Abortion in goats by Caprine alphaherpesvirus 1 in Spain.

An abortion outbreak occurred in a goat herd of Murciano-Granadina breed in Almeria Region in Spain where 80 pregnant females aborted. All bacteriological and parasitological examinations resulted negative, whereas virological investigations and real-time PCR assay showed the presence of Caprine alphaherpesvirus 1 DNA in the pathological specimens from aborted foetuses. Nucleotide sequence analysis revealed that the DNA was highly close related to the Swiss strain E-CH (99.7%) and a little less extent to the Italian BA.1 strain (99.4%). Histopathological examination revealed multifocal, well-circumscribed, 50- to 200-μm-diameter foci of coagulative necrosis in the liver, lungs and kidneys of three foetuses. In the periphery of the necrosis, there were frequently epithelial cells with the chromatin emarginated by large, round, amphophilic intranuclear viral inclusion bodies. The source of the infection in the herd could not clearly find out even some hypothesis were formulated. This seems to be the first report of an abortion outbreak due to Caprine alphaherpesvirus 1 in a goat herd in Spain.

Histopathological Effects of Maternal Alcohol Consumption in the Pups of Albino Rats

Alcohol consumption during pregnancy and lactation periods may result to some physical and histopathological changes in offsprings. This study was undertaken to investigate the possible effects of maternal alcohol intake on the testes and accessory sex organs of male pups of albino rats. Three groups of female albino rats; A, B and C were used for this study. Group A was the control group while groups B &amp; C served as test groups. Eight male pups were randomly selected weekly (for five weeks) from each group and were sacrificed. The individual weights of the testes and accessory sex organs were determined and thereafter fixed in formol saline. Histopathological investigation was done and photomicrographs were taken. There was a significant reduction (P&lt;0.05) in the mean weights of the testes in the test groups compared with control in all weeks under study. In contrast a significant reduction (P&lt;0.05) in the mean values of the weights of ventral lobes of prostate and epididymis were only noticed in weeks 5 and 6 while the mean value of weights of the vas deferens showed significant reduction (P&lt;0.05) in week 5 of the test groups compared with control group. The histopathological results revealed that exposure to alcohol caused focal coagulative necrosis of testicular seminiferous tubules in pre-natal alcohol exposed group B and a more diffuse coagulative necrosis of testicular seminiferous tubules in pre-and post- natal alcohol exposed group C. Therefore, there is the need for controlled alcohol consumption during pregnancy and lactation periods.

Non-functioning parathyroid carcinoma: a case report

BackgroundNon-functioning parathyroid carcinoma is a rare disease that is difficult to distinguish from other diseases based on the lack of hyperparathyroidism. This is a report of non-functioning parathyroid carcinoma diagnosed by reverse transcription polymerase chain reaction (RT-PCR) targeting parathyroid hormone (PTH) messenger RNA.Case PresentationThe patient is a 67-year-old male who visited our hospital for the chief complaint of hoarseness. A 5-cm mass was observed in the right lobe of the thyroid gland, and poorly differentiated thyroid carcinoma was suspected according to the fine-needle biopsy results. The laboratory data for thyroid functions, thyroglobulin, anti-thyroglobulin antibodies, calcium, phosphorus, and intact-PTH were all within the normal range. Right recurrent nerve paralysis was observed preoperatively. The patient was diagnosed with poorly differentiated thyroid carcinoma, and total thyroidectomy and central node dissection with partial resection of the right recurrent nerve and esophageal muscle were performed. The pathological findings revealed atypical cells containing clear cells in solid and alveolar structures with broad fibrosis. Mitosis, focal coagulative necrosis, and vascular and capsular invasions were observed. A slightly positive PTH immunohistochemical stain was noted, whereas the RT-PCR results were positive. We finally diagnosed this tumor as non-functioning PTC. No distant metastasis occurred, and the patient is still alive.ConclusionsThis is a report of a patient with non-functioning parathyroid carcinoma, which is clinically very rare. We diagnosed this tumor as non-functioning parathyroid carcinoma using RT-PCR for PTH mRNA.

Anaemia, Serum Iron Concentrations and δ-Aminolevulinate Dehydratase Activity in Laying Hens Infected Naturally by Salmonella Gallinarum

The aim of this study was to evaluate anaemia, serum iron concentrations and δ-aminolevulinate dehydratase (ALA-D) activity in laying hens infected naturally by Salmonella Gallinarum and having severe hepatic lesions. Liver and serum samples were collected from 27 laying hens (20 infected and seven uninfected). The δ-ALA-D activity, haematocrit and serum iron concentrations were evaluated. There were significant decreases in δ-ALA-D activity, haematocrit and serum iron concentrations (P<0.01) in birds infected by S. Gallinarum when compared with uninfected birds. There was a positive correlation (P<0.001) between serum iron concentration, haematocrit (r(2)=0.82) and δ-ALA-D activity (r(2)=0.75). A positive correlation was also observed between δ-ALA-D activity and haematocrit (r(2)=0.78; P<0.01). Liver samples showed moderate focal coagulative necrosis associated with infiltration of lymphoplasmacytic cells, macrophages and heterophils. The anaemia in the infected hens may be related to reduction in δ-ALA-D activity and serum iron concentrations, since both are important for haemopoiesis.

Nigella sativa and Aloe vera protection against doxorubicin hepatotoxicity

Doxorubicin (DOX) is a potent available antitumor agent; however, its clinical use is limited due to its significant toxicity to most tissues and organs. Administration of DOX induced acute hepatotoxicity manifested by significant elevation in serum and liver lipid peroxidation. The present study was designed to evaluate and confirm the protective effect of Nigella sativa (N.S), Aloe vera (A.V) and their mixture. A cumulative dose (30 mg/kg i.p.) of DOX divided into 6 equal doses administered over six weeks to male albino rats separate or combined with N.S, A.V or their mixture extract. At the end of the experiment, biochemical and histological parameters were assessed. Concerning oxidative stress and antioxidant defense system, the depleted hepatic glutathione content (GSH) of DOX-administered rats as well as glutathione peroxidase (GPx), catalase (CAT) and super oxide dismutase (SOD) activities were increased above normal levels as a result of pretreatment with N.S, A.V and their mixture. However, while elevated lipid peroxidation was noticed in DOX treated rats, pretreatment with N.S, A.V and their mixture produced a detectable decrease in the lipid peroxidation level. Histological measurements showed that DOX caused a marked rise multiple focal coagulative necrosis of hepatocytes associated with hemorrhage while rats pretreated with N.S, A.V and their mixture in combination with DOX showed no histopathological changes compared to normal control. From these data, it can be concluded that N.S, A.V and their mixture of extracts could be protective for the liver cells against DOX-induced hepatotoxicity due to their contents of polyphenolic compounds that might serve as novel adjuvant therapy with DOX.

Ebola viral encephalitis and myelitis

Ebola Virus Disease (EVD), formerly known as Ebola Haemorrhagic Fever, is a severe, often fatal illness in humans. To the best of our knowledge there is no link between Ebola and Encephalitis.Recent evidence suggests converging pathways through which viral infection, and its associated immune surveillance processes, may alter integrity of the BBB, and lead to inflammation, swelling of the brain parenchyma and associated neurological syndromes.Classical presentation is as a triad of fever, headache and altered mental state. There may be other findings either on examination or on imaging which, together with a travel history, may give clues as to the aetiology. It is important to note that in high- and middle-income countries the commonest cause of viral encephalitis is herpes simplex and Ebola.The organs of monkeys infected with Ebola haemorrhagic fever were examined by light and electron microscopy during the acute stage of disease. The virus caused focal coagulative necrosis in liver, spleen, kidney, lung and testis and widespread mild vascular damage. In brain there was intense congestion, with erythrocyte 'sludging', but no inflammatory reaction, significant injury to microvasculature in all organs. Virus replicated in endothelial cytoplasm causing focal necrosis, separation of tight junctions and detachment from basement membranes. These changes were associated with oedema and haemorrhage, contributing to hypovolaemic shock were not sufficiently extensive to account for severity of vascular collapse.Therefore, alongside with chest and abdominal pain, cough, conjunctivitis, jaundice, pancreatitis, lymphadenopathy, delirium, and coma, other complications after second week of infection include transverse myelitis and encepalitis. Ebola Virus Disease (EVD), formerly known as Ebola Haemorrhagic Fever, is a severe, often fatal illness in humans. To the best of our knowledge there is no link between Ebola and Encephalitis. Recent evidence suggests converging pathways through which viral infection, and its associated immune surveillance processes, may alter integrity of the BBB, and lead to inflammation, swelling of the brain parenchyma and associated neurological syndromes. Classical presentation is as a triad of fever, headache and altered mental state. There may be other findings either on examination or on imaging which, together with a travel history, may give clues as to the aetiology. It is important to note that in high- and middle-income countries the commonest cause of viral encephalitis is herpes simplex and Ebola. The organs of monkeys infected with Ebola haemorrhagic fever were examined by light and electron microscopy during the acute stage of disease. The virus caused focal coagulative necrosis in liver, spleen, kidney, lung and testis and widespread mild vascular damage. In brain there was intense congestion, with erythrocyte 'sludging', but no inflammatory reaction, significant injury to microvasculature in all organs. Virus replicated in endothelial cytoplasm causing focal necrosis, separation of tight junctions and detachment from basement membranes. These changes were associated with oedema and haemorrhage, contributing to hypovolaemic shock were not sufficiently extensive to account for severity of vascular collapse. Therefore, alongside with chest and abdominal pain, cough, conjunctivitis, jaundice, pancreatitis, lymphadenopathy, delirium, and coma, other complications after second week of infection include transverse myelitis and encepalitis.

Giant Extrapleural Solitary Fibrous Tumor of the Thigh.

Giant Extrapleural Solitary Fibrous Tumor of the Thigh.

Localization of annexins A1 and A2 in the respiratory tract of healthy calves and those experimentally infected with Mannheimia haemolytica.

Annexins A1 and A2 are proteins known to function in the stress response, dampening inflammatory responses and mediating fibrinolysis. We found, in healthy cattle recently arrived to a feedlot, that lower levels of these proteins correlated with later development of pneumonia. Here we determine the localization of annexin A1 and A2 proteins in the respiratory tract and in leukocytes, in healthy calves and those with Mannheimia haemolytica pneumonia. In healthy calves, immunohistochemistry revealed cytoplasmic expression of annexin A1 in the surface epithelium of large airways, tracheobronchial glands and goblet cells, to a lesser degree in small airways, but not in alveolar epithelium. Immunocytochemistry labeled annexin A1 in the cytoplasm of neutrophils from blood and bronchoalveolar lavage fluid, while minimal surface expression was detected by flow cytometry in monocytes, macrophages and lymphocytes. Annexin A2 expression was detected in surface epithelium of small airways, some mucosal lymphocytes, and endothelium, with weak expression in large airways, tracheobronchial glands and alveolar septa. For both proteins, the level of expression was similar in tissues collected five days after intrabronchial challenge with M. haemolytica compared to that from sham-inoculated calves. Annexins A1 and A2 were both detected in leukocytes around foci of coagulative necrosis, and in necrotic cells in the center of these foci, as well as in areas outlined above. Thus, annexins A1 and A2 are proteins produced by airway epithelial cells that may prevent inflammation in the healthy lung and be relevant to development of pneumonia in stressed cattle.Electronic supplementary materialThe online version of this article (doi:10.1186/s13567-014-0134-3) contains supplementary material, which is available to authorized users.