Giant Cell Dermatosis in FeLV-positive Cats

Abstract— Giant cell dermatosisis is reported in six cats with evidence of concurrent feline leukemia virus (FeLV) infection. Scaling, crusting and alopecia, accompanied by pruritus, affected the head and/or face predominantly in most cats; generalized skin disease developed in one cat. Histologically, giant keratinocytes resembling syncytial cells were found in the epidermis and superficial hair follicles, and were accompanied by dyskeratosis, pustules and ulcers. Immunohistochemical staining revealed FeLV antigen in the giant cells and adjacent keratinocytes. FeLV infection may have led to neoplastic alteration of the keratinocytes through recombination with host oncogenes
Resumen  Este artículo se basa en seis gatos con dermatosis de las células gigantes infectados con el virus FeLV. Éstos animales presentaban escamas y costras, así como pérdida de pelo y picor en las regiones de la cabera y cara, predominantemente. Tan solo uno de los gatos desarrolló una dermatosis generalizada. En el exámen histológico se demostró la presencia de keratinocitos gigantes con semejonza a las células sinticiales localizados en la epidermis y folículos pilosos superficiales, acompañados de disqueratosis, pústulas y ülceras. Las finturas histo-inmunológicas demostraron el antígeno FeLV en las células gigantes y keratinocitos adyacentes. La injeccion con el virus FeLV pudo haber conducido a la alteración neoplástica de los keratinocitos a través de la recombinación con los oncogenes del hospedador.     

Proximal femoral epiphyseal separation in the dog

Twenty-two cases of displaced upper femoral epiphysis in the dog have been reviewed with regard to the incidence, aetiology, radiographic and histological changes. The majority of the cases followed a severe traumatic episode but a significant number were associated with relatively trivial injuries. On histological examination necrosis of the epiphysis was common but the majority showed a rapid revascularization unassociated with collapse and deformity. The prevalence of the Labrador Retriever in the cases presented is noted.     

光与溫度对小麦品种抗条銹病性的影响

 試驗証明温度和光对小麦品种抗条銹病性的影响极大。由于小麦品种对条銹菌不稳定反应所造成生理鑑定小种的困难,基本上可通过严格控制温度和光获得解决。条锈菌生理小种的鑑定最好在15℃恆温和恆光的設备下进行。用日光灯为光源,光強度保持4,000 Lux,每日照射16小时即已足够使小麦品种正常发病。     

梨树黑星病的发病及防治研究

 梨树黑星病是我国北方梨树最主要的病害。分布于我国东北、华北、西北与华东各梨产区;在东北地区自辽宁省至黑龙江省都有发生,但重点发生地区則有辽宁省的綏中、兴城、錦西、北鎮、义县和吉林省的延边自治区等。     

小麦条绣病研究Ⅰ.小麦条锈菌的专化性研究

 禾谷类作物锈菌的专化性研究,首先在小麦秆锈病方面积累了丰富的资料;其次在小麦叶锈病、条锈病和燕麦冠锈病方面,也获得了不少的成就。     

小麦銹病化学治疗的研究

 治疗剂的应用是防治小麦锈病的新方向,已引起国际上普遍重视,并有不少成功的先例。     

Characteristics of glyphosate inhibition of growth in soybean and tobacco callus cultures

Callus cultures or tobacco (Nicotiana tabacum L. cv. While Gold and N. glauca-langsdorffii, a tumour-forming amphidiploid hybrid) and soybean Glycine max L., cv. Chippewa) were used lo study the effect of glyphosate [N-(phosphonnmethyl) glycine) un growth and interactions with growth hormones. Glyphosate inhibited growth both in the dark and light but showed a greater toxicity in the dark. This was contrary to its effect on chlorophyll degradation which was accelerated by light. The inhibition of growth was not reversed by simultaneous addition of aromatic amino acids to the medium. Thus the results suggest a multiple glyphosate action. The tobacco callus tissue was more sensitive to glyphosate than the soybean callus tissue, confirming a difference in tolerance between plant species. Despite the inhibitory effect of glyphosate. the treated tissue revived after being transferred to a glyphosate-free medium. The glyphosate-induced growth inhibition in soybean and tumour-forming tobacco callus cultures also was reversible by high levels of indole-3-acetic acid (IAA), which itself was inhibitory Theglyphosate-IAA interaction in the tissues which were sensitive to IAA suggests that the inhibition of growth by glyphosate was related to auxin levels in these tissues.