microscopic evaluation
Recently Published Documents


TOTAL DOCUMENTS

986
(FIVE YEARS 230)

H-INDEX

47
(FIVE YEARS 3)

2021 ◽  
Vol 2 (4) ◽  
pp. L10-L12
Author(s):  
R Appeltant ◽  
B V Adeniran ◽  
S A Williams

Lay summary To visualise tissues to determine the presence of disease or simply to understand anatomy, it is important to preserve fresh tissue. Fixatives are chemical solutions that preserve tissues to enable microscopic evaluation. However, some fixatives introduce artefact such as shrinkage of cells. Recently, a new fixative, Form-Acetic, was developed that is superior for preserving the structure of ovary tissue and allows investigation of ovary composition. One component of the ovary is hyaluronic acid (HA), which plays a crucial role in normal ovary function and fertility. Importantly, HA is sensitive to different fixative solutions. Therefore, it is meaningful to verify whether Form-Acetic is suitable for detecting HA. In this study, adult mouse ovaries were fixed in Form-Acetic and HA was detected. All HA-containing structures in the ovary were clearly distinguished which proves that the novel fixative allows the detection of HA.


2021 ◽  
Vol 2021 ◽  
pp. 1-4
Author(s):  
Jose Maria Pereira de Godoy ◽  
Lívia Maria Pereira de Godoy ◽  
Maria de Fatima Guerreiro Godoy ◽  
Dalisio de Santi Neto

Objective. The aim of the present study was to report the physiological stimulation of the synthesis of preelastic fibers in the dermis of a patient with fibrosis. Design. A clinical study was conducted involving the analysis of histological changes in preelastic fibers following treatment for stage II primary lymphedema for the clinical reversal of lymphedema and fibrosis. Setting. University Hospital of the São Jose do Rio Preto of School of Medicine in 2020. Participant was a 67-year-old male patient with late-onset primary lymphedema diagnosed 12 years earlier. Intervention is the lymphatic stimulation using the Godoy method adapted to the treatment of fibrosis. Main outcomes and measures are biopsies before and after treatment. Ten randomly selected histological fields were evaluated using the multipoint morphometric method. The values with this method are relative and expressed as percentages. Statistical analysis was performed with the t-test, considering a 95% significance level. Results. A visible, significant difference in the percentage of preelastic fibers was found between the preintervention and postintervention slides, which were confirmed by the microscopic evaluation and quantification (4.95 ± 0.64% and 14.70 ± 1.06%, respectively). Conclusion. The physiological stimulation of the lymphatic system using a specific method resulted in the clinical reduction of fibrosis, the return of the elasticity of the skin, and the stimulation of the synthesis of preelastic fibers.


2021 ◽  
Author(s):  
Dalan Jing ◽  
Xiaodan Jiang ◽  
Yilin Chou ◽  
Shanshan Wei ◽  
Ran Hao ◽  
...  

Abstract To investigate association of a type of previously neglected oval cell that located in corneal vortex with dry eye disease (DED). Observational, prospective study of 168 patients with different degrees of DED. In vivo confocal microscopy was used to observe the corneal sub-basal nerves and Langerhans cells (LCs) in both corneal vortex and periphery. The bright and oval cells also be inspected in corneal vortex. An artificial intelligence (AI) technique generated the sub-basal nerve fibre parameters. Patients were divided into three different groups based on existence of inflammatory cells. Group 2 patients showed a significant increase in corneal peripheral nerve maximum length and corneal peripheral nerve average density. Patients in Group 3 had more LC numbers than others. A type of bright and oval cell was identified in the corneal vortex might be a type of immature LC and related to disease severity of DED.


2021 ◽  
pp. 030098582110668
Author(s):  
Olivia M. Patania ◽  
Shiho Chiba ◽  
Peter J. Halfmann ◽  
Masato Hatta ◽  
Tadashi Maemura ◽  
...  

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the cause of coronavirus disease 2019, which ranges from fatal disease in some to mild or subclinical in most affected individuals. Many recovered human patients report persistent respiratory signs; however, lung disease in post-acute infection is poorly understood. Our objective was to describe histologic lung lesions and viral loads following experimental SARS-CoV-2 infection in 11 cats. Microscopic evaluation at 3, 6, 10, or 28 days postinoculation (DPI) identified mild to moderate patchy interstitial pneumonia, bronchiolar epithelial damage, and occlusive histiocytic bronchiolitis. Based on immunohistochemistry, alveolar septal thickening was due to CD204-positive macrophages, fewer B and T lymphocytes, type II pneumocytes, and capillary proliferation with a relative dearth of fibrosis. In blood vessel endothelium, there was reactive hypertrophy or vacuolar degeneration and increased MHC II expression at all time points. Unexpectedly, one cat from the 28 DPI group had severe subacute regionally extensive lymphohistiocytic pneumonia with multifocal consolidation, vasculitis, and alveolar fibrin. Reverse transcriptase-quantitative polymerase chain reaction identified SARS-CoV-2 RNA within the lung at 3 and 6 DPI, and viral RNA was below the limit of detection at 10 and 28 DPI, suggesting that pulmonary lesions persist beyond detection of viral RNA. These findings clarify our comparative understanding of disease induced by SARS-CoV-2 and suggest that cats can serve as an informative model to study post-acute pulmonary sequelae.


2021 ◽  
pp. 3156-3163
Author(s):  
Bongot Huaso Mulia ◽  
Ardyta Widianti ◽  
Jansen Manansang ◽  
Dedi Rahmat Setiadi ◽  
Vincentia Trisna Yoelinda ◽  
...  

Background and Aim: The Javan leopard (Panthera pardus melas Cuvier, 1809) is a subspecies of Panthera pardus spp., spread across the African and Asian regions. Information on reproductive aspects is crucial for wild animals, including the Javan leopard. In this study, we aimed to develop electroejaculator (EE) techniques and evaluate cryopreservation success in Javan leopard semen. Materials and Methods: The semen of four adult Javan leopards was collected once a week using EE. Placement of the EE probe in the rectum was performed after ultrasound imaging (ultrasonography) to determine the prostate body location. The semen obtained was then evaluated macroscopically and microscopically. Three Javan leopards were used for cryopreservation. The ejaculate was divided into two parts [i.e., one part diluted with AndroMed® (Minitüb, Tiefenbach, Germany) and the other part with Steridyl® (Minitüb, Tiefenbach, Germany)] at a 1:1 ratio immediately after collection and evaluation. The semen was then packed in a 0.25 mL MiniStraw® (Minitüb, Tiefenbach, Germany) then equilibrated at 4°C for 2 h. After equilibration, the straw was then frozen in liquid nitrogen vapor. Frozen semen was then stored in containers until further evaluation. Results: The results showed that ejaculation response occurred at all levels of stimulation, while erections did not always occur. The fastest ejaculation and erection occurred at the fourth voltage. The macroscopic evaluation showed that the semen volume was 0.80±0.26 mL, cloudy white, pH 7.44±0.14, and with watery semen consistency. The microscopic evaluation showed that the sperm motility was 66.98±0.39%, with sperm viability of 75.6±1.79%. Sperm concentration was 62.17±46.95×106 mL–1 with a total concentration of 42.14±23.51×106 cells. Normal sperm morphology is only 40.72±6.26%. Conclusion: This study concluded that the development of a semen collection technique using an EE preceded by imaging of the EE probe location using ultrasound was effective for the ejaculation of Javan leopards. The characteristics of the semen of the Javan leopard showed moderate semen volume, sperm motility, and viability. Javan leopard showed low sperm concentration and normal sperm morphology.


Author(s):  
M. Sandhya Bhavani ◽  
G. R. Baranidharan ◽  
B. Rubinibala ◽  
L. Nagarajan

Aim: Ectoparasites associated dermatological disorders are frequently encountered in laboratory and pet rabbit medicine practice, however, L. gibbus is the only ectoparasite rarely reported in either pet and laboratory rabbits or hares as L. gibbus are usually asymptomatic. The aim of the present report is to describe a case of alopecia and dermatitis associated with Lepoarcarus gibbis in a rabbit from India. Presentation of Case: A 1.5 year old female New Zealand White rabbit was presented to the Dermatology Unit with erythema and poorly demarcated alopecia on the dorsal neck and face. A skin scraping and coat brushings were performed. On microscopic evaluation of hair samples, L. gibbus infestation was confirmed. Treatment with ivermectin (0.3 mg/kg) biweekly once for 3 doses proved effective. Discussion and Conclusion: L.gibbus may be presented with severe hairfall in the absence of other mites and treatment with ivermectin is effective. Based on the literature research this may be the first case report on alopecia and dermatitis due to L.gibbus in rabbit from India. Further studies should be planned on the prevalence of the mite as it is reported to have zoonotic potential.


Medicina ◽  
2021 ◽  
Vol 57 (12) ◽  
pp. 1328
Author(s):  
Jan Soukup ◽  
Jan Cerny ◽  
Martin Cegan ◽  
Petr Kelbich ◽  
Tomas Novotny

Human toxocariasis is a helminthozoonosis caused by the migration of Toxocara species larvae through an organism. The infection in humans is transmitted either by direct ingestion of the eggs of the parasite, or by consuming undercooked meat infested with Toxocara larvae. This parasitosis can be found worldwide, but there are significant differences in seroprevalence in different areas, depending mainly on hot climate conditions and on low social status. However, the literature estimates of seroprevalence are inconsistent. Infected patients commonly present a range of symptoms, e.g., abdominal pain, decreased appetite, restlessness, fever, and coughing. This manuscript presents a case report of a polytraumatic patient who underwent a two-phase spinal procedure for a thoracolumbar fracture. After the second procedure, which was a vertebral body replacement via thoracotomy, the patient developed a pathologic pleural effusion. A microscopic cytology examination of this effusion revealed the presence of Toxocara species larvae. Although the patient presented no specific clinical symptoms, and the serological exams (Enzyme–linked immunosorbent assay (ELISA), Western blot) were negative, the microscopic evaluation enabled a timely diagnosis. The patient was successfully treated with albendazole, with no permanent sequelae of the infection.


Technologies ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 96
Author(s):  
Md. Mahiuddin ◽  
Bungo Ochiai

Sustainable synthesis of reduced graphene oxide (rGO) is of crucial significance within the development of carbon nanomaterials. In this study, a green and eco-friendly strategy for the synthesis of rGO using lemon juice as the reducing agent for graphene oxide (GO) without using toxic and harmful chemicals was demonstrated. The reduction with lemon juice effectively eliminated the oxygen-containing functionalities of GO and regenerated the conjugated systems as confirmed by the UV-vis and FTIR spectroscopic and X-ray diffraction analyses. Microscopic evaluation showed the successful manufacturing of exfoliated and separated few layers of nano-sheets of rGO. The application of the resultant rGO as an adsorbent for organic pollutants was investigated using methylene blue (MB) as a model. The adsorption kinetics of MB on rGO is best matched with the pseudo-second-ordered kinetic model and the Langmuir model with a high adsorption capacity of 132.2 mg/g. The rGO exhibited good reusability with a removal efficiency of 80.4% in the fourth cycle. This green method provides a new prospect for the large-scale production of rGO in a cost-effective and safe manner.


Sign in / Sign up

Export Citation Format

Share Document