Dictyocaulus viviparus bulk tank milk seropositivity is correlated with meteorological variables.

Control of infections with Dictyocaulus viviparus is difficult due to its volatile epidemiology. In the absence of predictive models, 'vigilance and treatment' is today's mainstay for control. In order to evaluate the potential of predictive model development to support a more preventative approach, this longitudinal study aimed at understanding the influence of weather factors on D. viviparus bulk tank milk antibody ELISA results. Bulk tank milk samples were analysed with a Major Sperm Protein-based ELISA (expressed as an optical density ratio) twice monthly on 717 Flemish dairy farms during the grazing season (April-October) in 2018. Meteorological data of the sampled farms were obtained at 1 km spatial scale using the ALARO-SURFEX climate model. A mixed effects model showed that the bulk tank milk optical density ratio was significantly associated with the month of sampling, evapotranspiration, temperature and its quadratic term, the number of hot days and the number of rainy days in the 7-8 weeks prior to sampling. There were significant farm effects involved. The model's accuracy to predict bulk tank milk optical density ratio infection status was 80%, while optical density ratios were generally overestimated by 38%. Inclusion of the previous (2-week-old) optical density ratio values increased accuracy to 86% and reduced the mean square error. We conclude that meteorological parameters have a predictive value for bulk tank milk optical density ratio results, while further research should evaluate model improvements through the addition of herd management factors as well as confirm the predictive power through external validation in additional farms and years.

Structural study and large magnetocaloric entropy change at room temperature of La1-x □ x MnO3 compounds.

In this study, our central focus is to investigate the magnetocaloric characteristics of a La1-x □ x MnO3 (x = 0.1, 0.2 and 0.3) series prepared by a sol-gel technique published in Prog. Mater. Sci., 93, 2018, 112-232. The crystallographic study revealed that our compounds crystallize in a rhombohedral structure with R3̄c. Ferromagnetic (FM) and paramagnetic (PM) characters were detected from the variation in magnetization as a function of magnetic fields at different temperatures. The second order transition was verified from the Arrott plots (M 2 vs. (µ 0 H/M)), where the slopes have a positive value. In order to verify the second order, we traced the variation of magnetization vs. temperature at different magnetic fields for x = 0.2. This revealed a ferromagnetic (FM)-paramagnetic (PM) transition when temperature increases. Relying on the indirect method while using the Maxwell formula, we determined the variation in the entropy (-ΔS M) as a function of temperature for different magnetic fields for the three samples. We note that all the studied systems stand as good candidates for magnetic refrigeration with relative cooling power (RCP) values of around 131.4, 83.38 and 57.26 J kg-1 with magnetic fields below 2 T, respectively. Subsequently, the magnetocaloric effect was investigated by a phenomenological model for x = 0.2. The extracted data confirm that this phenomenological model is appropriate for the prediction of magnetocaloric properties. The study also demonstrated that this La0.8□0.2MnO3 system exhibits a universal behaviour.

Biaxial coherence length in a nematic π-cell.

In a highly frustrated calamitic nematic phase, the strain can be relaxed by lowering the nematic order: the starting uniaxial symmetry can be broken and it can be replaced locally with transient biaxial domains. Using simple optical retardation measurements, we estimate the length scale over which the biaxial disturbance decays in space within a π-cell submitted to a weak electric field. We also characterise the transition cascade from the uniaxial splay texture to a bend texture through slow defect motion.

Biaxial surface order dynamics in calamitic nematics.

Thermotropic nematic materials relax strong distortions by lowering the nematic order: the uniaxial symmetry is broken and is locally replaced by biaxial domains. We investigated the dynamics of the nematic order near a boundary surface of an asymmetric π-cell submitted to an external electric field, close to the electric order reconstruction threshold. An unexpected phenomenon is observed close, but below the threshold: the biaxial order spreads on the surface inducing a consequent bulk topological behaviour equivalent to the splay-bend fast transition allowed by order reconstruction at higher voltage.

[Ocular ochronosis. A case report]. / Manifestations oculaires de l'ochronose. A propos d'un cas.

Ochronosis or alkaptonuria is a rare inherited disease. It is characterized by the deposition of dark pigments in collagen-rich tissues, which leads to clinical manifestations such as arthropathy. The ochronotic pigment can be found in the sclera, the conjunctiva, and the limbic cornea. Vision is usually not affected. We report the case of 47-year-old patient who complained of lower back pain. Ophthalmologic examination showed dark pigments in the conjunctiva. The increased levels of homogentisic acid in urine confirmed the diagnosis of ochronosis.

Pemphigus in the Mediterranean region of Turkey: a study of 148 cases.

BACKGROUND: The purpose of this study was to describe the epidemiological and clinical features, course, response to treatment, and prognosis of pemphigus in the Mediterranean region of Turkey. METHODS: All patients with confirmed pemphigus were prospectively enrolled in two major dermatology departments in the cities of Adana and Antalya in the Mediterranean region between March 1998 and March 2004. Details including demography, findings of clinical examinations, treatment, course, and prognosis were recorded. RESULTS: One hundred and forty-eight patients with pemphigus were diagnosed during the 6-year period, with a prevalence of 1.46 and an annual incidence of 0.24 per 100,000 in this region. There was a female predominance with a male to female ratio of 1:1.4. Pemphigus vulgaris (PV) was the most common clinical subtype, identified in 123 patients (83%). The mean age of onset was 43. In 101 (82%) patients with PV, disease began as persistent oral ulcers. The majority of the patients with PV could be managed with middle or high-dose steroids (60-140 mg/day). Complete clinical remission was obtained in 41 (39.4%) patients. The mortality rate was 4.8%. CONCLUSIONS: A moderately high incidence of pemphigus was found in the Mediterranean region of Turkey as compared with that encountered in other countries. The commonest clinical subtype was PV with a 9.5-fold higher incidence than pemphigus foliaceus. It is more frequent in middle-aged people and has a female predominance. Although a relatively higher dose of steroid was needed to control the PV, the disease completely remitted in a significant proportion of the patients.

Comparison of conventional and polymerase chain reaction diagnostic techniques for leishmaniasis in the endemic region of Adana, Turkey.

BACKGROUND: Cutaneous leishmaniasis (CL) has long been reported in the Cukurova region. We have compared the sensitivity of the conventional methods of diagnosis by microscopy and cultivation of lesion aspirates against polymerase chain reaction (PCR) amplification of parasite-specific DNA from these samples. METHODS: The samples (n = 25) were obtained from patients clinically diagnosed with CL at the regional dermatology clinic. Aliquots of the samples were stained with Giemsa for microscopy and cultured in Novy-Nicolle-McNeal (NNN) blood agar for promastigote growth. The remainder were subjected to DNA extraction for PCR amplification of the conserved region of kinetoplast minicircle DNA. PCR products of the expected size (120 bp) were observed after agarose gel electrophoresis, followed by staining with ethidium bromide. RESULTS: The positive rates from 25 samples were 44%, 68%, and 100% for cultivation, microscopy, and PCR, respectively. CONCLUSIONS: The PCR method used appears to be the most sensitive for the diagnosis of CL in this region.

[Combined hamartoma of the retina and retinal pigment epithelium. Four case studies]. / Hamartome combiné de l'épithélium pigmentaire et de la rétine. A propos de 4 cas.

INTRODUCTION: Combined hamartoma of the retina and retinal pigment epithelium is a rare condition, characterized by a proliferation of the retinal pigmentary epithelium and retinal gliosis leading to a disorganization of the retina and papilla. This study aimed to demonstrate the advantages of early diagnosis and regular monitoring. OBSERVATIONS: We report a series of four children followed between 2001 and 2004 with combined hamartoma of the retina and retinal pigment epithelium, with age of diagnosis ranging from 3 months to 8 years. The main reason for consultation was reduction of vision. The clinical examination objectified the existence of a slightly grayish peripapillary formation with tortuous retinal vessels. This condition was confirmed by angiography with fluorescein in three cases and by optical coherence tomography (OCT) in one case. Progression showed the persistence of low vision in all four cases and the appearance of a neovascular membrane in one case. DISCUSSION: Combined hamartoma of the retina and retinal pigment epithelium is probably a congenital tumor whose pathogenesis has not yet been elucidated. The diagnosis is clinical and the patient can be thoroughly examined by retinal angiography and optical coherence tomography (OCT). In this disorder, it is important to eliminate retinoblastoma and malignant melanoma of the choroid, showing the advantage of radiological exploration. Progression is stationary; nevertheless a reduction in visual acuity can be related to an epiretinal membrane or a neovascular membrane. CONCLUSION: Knowledge of the clinical aspect is essential to differentiate this condition from the malignant retinal processes. This tumor can progress in spite of its benign character. Regular follow-up is essential and can improve the visual prognosis.

Oral fluconazole in the treatment of tinea versicolor.

This study was designed to assess the efficacy, tolerability, and safety of oral fluconazole given at 300 mg once weekly for two weeks in the treatment of tinea versicolor. Enrolled into the study were 44 subjects with tinea versicolor, provisionally confirmed by the detection of fungal hyphae in KOH wet mounts and Wood's lamp examination. Four subjects were classified as dropouts because no information was obtained from them after the baseline visit. Subjects were treated for two weeks orally with fluconazole 300 mg weekly and followed at the 1st, 2nd, 4th and 12th weeks of treatment. The study included 40 subjects (26 males and 14 females, mean age 29 years, range 19-48 years). At the week 4 visit, 30 (75%) patients showed a complete cure and 31 (77.5%) patients showed mycologic cure. Ten (25%) patients had no significant response to therapy. At the final follow-up visit (week 12), none of the patients showing complete or mycologic cures exhibited a recurrence. No adverse effects were observed in any of the patients treated. We believe that, due to the low incidence of side effects, shorter treatment duration, and increased adaptation of the patients, fluconazole can be used in the treatment of tinea versicolor with confidence.

Clinical features, epidemiology, and efficacy and safety of intralesional antimony treatment of cutaneous leishmaniasis: recent experience in Turkey.

A total of 1,030 patients, 40.2% men and 59.8% women, identified during the period of October 1998 to November 2002 as having cutaneous leishmaniasis (CL), were studied; 1,431 lesions were identified in the 1,030 patients. One lesion was present in 80.7% of the patients. The size of the lesions (longest axis) was 13.6 mm (standard, 12.1 mm; range 3-150 mm). Most of the lesions were of the papular type (51.2%), although several atypical clinical presentations of CL were observed. The duration of the disease ranged between 1 and 72 mo (mean duration, 10.8 mo). The clinical suspicion of CL was confirmed by the observation of amastigotes on lesion tissue samples stained by Giemsa. The test was positive in 851 of 1,030 patients (82.6%). Intralesional meglumine antimonate solution (85 mg Sb/ml, 0.2-1 ml, depending on the size of the lesion) weekly until complete cure or up to 20 wk was used for first-line therapy of 890 patients (86.4%). We found that this regimen of intralesional Sb has an efficacy of 97.2% with a low relapse rate of 3.9% and no serious adverse side effects.

A sensitive new microculture method for diagnosis of cutaneous leishmaniasis.

A sensitive microcapillary culture method (MCM) was developed for rapid diagnosis of cutaneous leishmaniasis (CL). The MCM is superior to the traditional culture method (TCM) as determined by the smaller inoculum size, the higher sensitivity for detection of promastigotes, and the more rapid time for emergence of promastigotes. With lesion amastigote loads from grade III to 0, the positive rates and the periods for promastigote emergence were 3-4-fold higher and faster with the MCM than with the TCM, e.g., 83-97% positive in 4-7 days versus 20-40% positive in 15-30 days (P = 0.0001). The higher Pco(2) and lower Po(2) and pH presumably encourage a rapid amastigote-to-promastigote differentiation and/or the survival or growth of the latter. This MCM has the advantage of simplicity, and may be suitable for diagnostic use and for parasite retrieval in many other endemic sites where parasites are known to be difficult to grow.

Antiphospholipid syndrome and retinal vein occlusion in adults.

Antiphospholipid antibodies may play and important role in the pathogenesis of retinal vascular occlusions; investigated the prevalence among 33 patients with retinal vein and artery occlusions and 80 controls. Prevalence was 33% and 5% respectively. Ophthalmic examination and fluorescein angiography showed that occlusions were due to ischaemic events. The 11 patients were diagnosed with antiphospholipid syndrome: 9 patients were treated successfully with laser photocoagulation and anticoagulant and anti-aggregant therapy. Two patients with antiphospholipid antibodies associated with resistance to activated protein C had unfavourable outcomes. Our results suggest a correlation between antiphospholipid syndrome and retinal vein occlusions; we recommend a systematic search for antiphospholipid antibodies in occlusions of unexplained origin and laser photocoagulation treatment and long-term oral anticoagulant and anti-aggregant therapy.

Antiphospholipid syndrome and retinal vein occlusion in adults

Antiphospholipid antibodies may play and important role in the pathogenesis of retinal vascular occlusions; investigated the prevalence among 33 patients with retinal vein and artery occlusions and 80 controls. Prevalence was 33% and 5% respectively. Ophthalmic examination and fluorescein angiography showed that occlusions were due to ischaemic events. The 11 patients were diagnosed with antiphospholipid syndrome: 9 patients were treated successfully with laser photocoagulation and anticoagulant and anti-aggregant therapy. Two patients with antiphospholipid antibodies associated with resistance to activated protein C had unfavourable outcomes. Our results suggest a correlation between antiphospholipid syndrome and retinal vein occlusions; we recommend a systematic search for antiphospholipid antibodies in occlusions of unexplained origin and laser photocoagulation treatment and long-term oral anticoagulant and anti-aggregant therapy

[Compressive optic neuropathy caused by fibrous dysplasia]. / Neuropathie optique compressive secondaire à une dysplasie fibreuse.

We report a case of compressive optic neuropathy caused by fibrous dysplasia in a 28-year-old woman. The patient had no significant medical history. Her best-corrected visual acuity was 20/20 in the right eye and 20/400 in the left eye. There was an afferent pupillary defect in the left eye. Slit-lamp examination was unremarkable. Funduscopy showed a normal optic disc bilaterally and congenital hypertrophy of the retinal pigment epithelium in the right eye. Systemic evaluation disclosed facial asymmetry and mucocutaneous lentiginosis involving the face and the limbs. Goldmann visual field testing showed a cecocentral scotoma in the left eye. Imaging studies demonstrated extensive changes of craniofacial fibrous dysplasia involving the sphenoid bone, with compression of the left optic nerve by a cystic structure. Results of gastrointestinal fibroscopy were unremarkable. The patient was given systemic steroids. After 4 days of treatment, her visual acuity had improved to 20/40, with resolution of the afferent pupillary defect and visual field improvement. Debulking of the tumor was recommended, but the patient declined the procedure. She has remained stable over 13 months of follow-up. Compressive optic neuropathy should be considered as a leading cause of visual loss in patients with craniofacial fibrous dysplasia. Early diagnosis, close follow-up, and appropriate management are mandatory to improve or maintain the visual function in such patients.

An epidemicity of Paederus species in Cukurova region.

Two hundred four patients (117 females, 87 males; age range: 3-80 y) were admitted to our facility between May 1995 and June 1997 and studied to determine the endemicity of the Paederus species, which has been increasing for the last 6 years (especially in May and June) in the Cukurova region of southern Turkey. Clinically, infection with the Paederus species mimics contact dermatitis, herpes zoster, bullous impetigo, and phytophotodermatitis. Definitive diagnosis is made by historical and clinical findings. To determine the main histopathologic features of this infestation, biopsy specimens were obtained from 9 patients and stained with hematoxylin and eosin (H&E). In most patients, the skin lesions were located on the exposed parts of the body. Clinically, these lesions were linear, vesicular, bullous, and/or pustular on erythematous bases and resembled either phytophotodermatitis, herpes zoster, or impetigo rather than classic insect bites. Pederin, which is released from the Paederus species, may cause these lesions. The number of cases has increased markedly during the last 5 years. In the coming years, we expect this number to increase significantly.

[Submandibular lithiasis. Report of 48 cases]. / Les sous-mandibulites lithiasiques. A propos de 48 cas.

This retrospective study concerned 48 patients treated surgically for sub mandibular lithiasis. Results of medical imaging (plain films, sialography, ultrasonography) are confronted with operative findings. The surgical indications are analysed according to lithiasis localisation.

The current state of the radiological diagnosis of acoustic neuroma.

Thin, overlapping section, contrast-enhanced, axial and coronal CT, with additional high-resolution (HR) treatment of the sections through the internal auditory canal, was performed on 31 patients clinically suspected of acoustic neuroma. With this technique 13 acoustic neuromas protruding more than 10 mm and eight acoustic neuromas protruding between 2 and 10 mm outside the internal auditory canal were unequivocally diagnosed. O2CT cisternography was performed on ten patients. An intracanalicular neuroma was diagnosed in three cases with this technique, also a small extracanalicular neuroma in one case, and an acoustic neuroma was definitely excluded in six cases. It is concluded that O2CT cisternograhy is the diagnostic procedure of choice for the detection of purely intracanalicular neuromas and the definite exclusion of acoustic neuroma. HR CT proved superior to polytomography for the evaluation of the internal auditory canal and should be performed in every case suspected of acoustic neuroma. A protocol for the radiological investigation of patients suspected of acoustic neuroma is given.