scholarly journals Is Demodex really non-pathogenic?

2000 ◽  
Vol 42 (3) ◽  
pp. 171-173 ◽  
Author(s):  
Gil Patrus PENA ◽  
José de Souza ANDRADE FILHO
Keyword(s):  
Rare Disease ◽  
Giant Cell ◽  
Causative Agent ◽  
Tissue Damage ◽  
Multinucleated Giant Cell ◽  
Histopathological Examination ◽  
Demodex Folliculorum ◽  
Pathogenic Parasite ◽  
Common Parasite

Although usually considered a non-pathogenic parasite in parasitological textbooks, Demodex folliculorum has been implicated as a causative agent for some dermatological conditions, such as rosacea-like eruptions and some types of blepharitis. Several anecdotal reports have demonstrated unequivocal tissue damage directly related to the presence of the parasite. However, this seems to be exceedingly rare, in contrast with the marked prevalence of this infestation. We have had the opportunity to observe one of such cases. A 38-year-old woman presented with rosacea-like papular lesions in her right cheek. Histopathological examination revealed granulomatous dermal inflammation with a well-preserved mite phagocytized by a multinucleated giant cell. This finding may be taken as an evidence for the pathogenicity of the parasite, inasmuch as it does not explain how such a common parasite is able to produce such a rare disease.

scholarly journals Tuberculous Dactylitis" (Spina Ventosa) in a 19 years old boy - a very rare disease

KYAMC Journal ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 726-728
Author(s):  
Muhammad Jahangir Howlader ◽  
Sohana Siddique ◽  
Abu Bakar Siddique
Keyword(s):  
Rare Disease ◽  
Giant Cell Tumor ◽  
Giant Cell ◽  
Bone Grafting ◽  
Histopathological Examination ◽  
Ring Finger ◽  
Middle Part ◽  
Cell Tumor ◽  
Osteoarticular Tuberculosis ◽  
Unusual Form

Tuberculous Dactylitis is an unusual form of osteoarticular tuberculosis, involving the short bones of the hand & feet. Hence it is also known spina vantosa. In our case, a 19 years old boy presented with a swelling in the middle part of right ring finger which was provisionally diagnosed as a Giant cell tumor while the possibility of spina ventosa (Tubercular dactylitis) was kept in mind. He was admitted for curettage of the phalanx followed by bone grafting. Histopathological examination report confirmed it as Spina ventosaKYAMC Journal Vol. 7, No.-1, Jul 2016, Page 726-728

INVESTIGATION OF THE EFFECT OF BLACK SEED OIL ON DIABETES-INDUCED - TESTICULAR DAMAGE: A HISTOPATHOLOGICAL STUDY

2021 ◽  
pp. 29-31
Author(s):  
Seval Kaya ◽  
Yusuf Nergiz ◽  
Firat Asir
Keyword(s):  
Tissue Damage ◽  
Seed Oil ◽  
Histopathological Examination ◽  
Male Rats ◽  
Seminiferous Tubules ◽  
Control Group ◽  
Histopathological Study ◽  
Diabetes Group ◽  
Black Seed ◽  
Black Seed Oil

In this study, it was aimed to investigate the protective effect of black seed oil against testicular tissue damage in diabetic rats. A total of 18 male rats were divided into 3 groups, including 6 rats in each group.Groups; control (n=6), diabetes (n=6), diabetes + black seed oil (n=6). A single dose of 45 mg / kg streptozocine (STZ) was injected intraperitoneally to induce diabetes. Diabetes + Black seed oil group: For 56 days, 2.5 ml / kg of black seed oil was administered orally to rats.The rats were sacriced at the end of 56 days. Testicular tissues were taken for routine parafn tissue processing for histopathological examination. Parafn sections were stained with Hematoxylin-Eosin and PAS and examined under a light microscope. Atrophy and degeneration were observed in the seminiferous tubules of diabetic group. Histology of black seed oil group sections were similar to that of control group. A signicant difference was found between the black seed oil group and the diabetes group in terms of blood glucose values. As a result, we think that Black Seed Oil ameliorates to the tissue damage caused by diabetes and the decrease in blood sugar value.

Investigation of the effects of bisphenol-A exposure on lymphoid system in prenatal stage

2020 ◽  
Vol 36 (7) ◽  
pp. 502-513
Author(s):  
Işil Aydemir ◽  
Caner Özbey ◽  
Oktay Özkan ◽  
Şadiye Kum ◽  
Mehmet İbrahim Tuğlu
Keyword(s):  
Lymph Node ◽  
Bisphenol A ◽  
Tissue Damage ◽  
Corn Oil ◽  
Histopathological Examination ◽  
Female Rats ◽  
Male Rats ◽  
High Dose ◽  
Organ Function ◽  
Pregnant Rats

Bisphenol-A (BPA) used in the production of plastic materials is a temperature-soluble agent. It also has a steroid hormone-like activity; therefore, it poses a danger to human health. In our study, we aimed to investigate the effects of BPA on lymph node and spleen in male rats exposed to this agent during prenatal stage. The pregnant female rats were divided into four groups: control, sham, low dose (300 µg/kg BPA), and high dose (900 µg/kg BPA). BPA was dissolved in 1 mL of corn oil and administered to the pregnant rats every day during pregnancy. On the 21st and 45th day after the birth, male rats’ lymph node and spleen samples were taken and histopathological examination was performed. Samples were stained with hematoxylin and eosin to determine the general histological appearance, and with CD3 and CD20 immunohistochemically. The results of staining were evaluated by H-score, and statistical analysis was performed. In the samples, BPA applications were not found to cause significant tissue damage. But there was a significant decrease in the immunoreactivities of CD3 and CD20 after BPA applications in both 21st and 45th day samples. After high dose BPA administration, decreased CD3 immunoreactivity was statistically significant. It is thought that BPA does not cause histologically significant tissue damage, but it may impair organ function at cellular level. The investigation of molecules involved in organ function will be useful in revealing the mechanisms that will cause dysfunction.

scholarly journals Antiperiodontitis Effects of Magnolia biondii Extract on Ligature-Induced Periodontitis in Rats

Nutrients ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 934 ◽  
Author(s):  
Hae Jin Lee ◽  
Dong-Ryung Lee ◽  
Bong-Keun Choi ◽  
Seung Hwan Yang
Keyword(s):  
Bone Loss ◽  
Tissue Damage ◽  
Alveolar Bone ◽  
Histopathological Examination ◽  
Nuclear Factor Κb ◽  
Alveolar Bone Loss ◽  
Gingival Tissue ◽  
Protective Effects ◽  
Tissue Destruction ◽  
Commercial Kits

Over the past decades, periodontitis has become a rising health problem and caused various diseases. In the many studies shows that some extracts and compound to the prevention and treatment of periodontitis. This study focuses on the effects of inhibition of gingival damage and alveolar bone loss. The aim of this study was to evaluate the protective effects of Magnolia biondii extract (MBE) against ligature-induced periodontitis in rats. A ligature was placed around the molar teeth for 8 weeks, and MBE was administered for 8 weeks. Gingival tissue damage and alveolar bone loss were measured by microcomputed tomography (CT) analysis and histopathological examination. Serum Interluekin-1 β (IL-1β), tumor necrosis factor-α (TNF-α), cyclooxygenases-2 (COX-2), and receptor activator of nuclear factor–κB ligand (RANKL) levels were investigated using commercial kits to confirm the antiperiodontitis effects of MBE. We confirmed that ligature-induced periodontitis resulted in gingival tissue damage and alveolar bone loss. However, treatment for 8 weeks with MBE protected from periodontal tissue damage and downregulated serum inflammatory cytokine factors and RANKL levels. These results suggest that MBE exerts antiperiodontitis effects by inhibiting gingival tissue destruction and alveolar bone loss through regulation of anti-inflammatory cytokines in periodontitis-induced rats.

scholarly journals SCROTAL CALCINOSIS - RARE CASE REPORTS OF TWO CASES

2012 ◽  
Vol 02 (02) ◽  
pp. 57-59
Author(s):  
Harish S. Permi ◽  
Rohan Shetty ◽  
Shalmali Alva ◽  
Balakrishna Shetty ◽  
Rajesh Ballal ◽  
...  
Keyword(s):  
Giant Cell ◽  
Rare Case ◽  
Histopathological Examination ◽  
Case Reports ◽  
Amorphous Material ◽  
Benign Disease ◽  
Cell Reaction ◽  
Granulomatous Reaction ◽  
Large Size

AbstractScrotal calcinosis is a benign disease characterized by multiple calcified scrotal nodules. The nodules develop slowly over many years and patients usually do not seek for treatment, until they grow to large size. Histopathological examination shows deposition of basophilic amorphous material surrounded by giant cell granulomatous reaction. We report two cases of scrotal calcinosis occurring in 27 year and 45 year old males who presented with multiple scrotal swellings. Clinical diagnosis was multiple sebaceous cysts. On histopathology, excised swellings showed deposition of calcium with giant cell reaction. On regular follow up both are doing fine without any recurrence.

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