Locally invasive lymphangiosarcoma in a young domestic shorthair     

Jackson DE  Berent LM  Cohn LA  Senter DA 《Journal of Feline Medicine and Surgery》2011,13(10):796-799

A 2-year-old, female spayed, domestic shorthair cat presented to the University of Missouri-Veterinary Medical Teaching Hospital (UMC-VMTH) with an approximately 11-month history of fluid-draining pockets along her ventral thorax and axillae. The skin in these regions was erythematous, and multiple areas drained a serous to serosanguinous fluid. Fluid-filled, nodules formed along the ventrum, but these nodules disappeared as fluid drained spontaneously. Histologic assessment of skin biopsies revealed areas of vascular proliferation extending along the deep margin of the section and rare instances of invasion into the superficial dermis. These vascular channels were devoid of cells, lined by variably pleomorphic endothelial cells which had a low mitotic index. Based on the mild to moderate pleomorphism, positive staining with prospero-related homeobox gene-1 (PROX-1), and the locally aggressive nature of the tumor, a final diagnosis of lymphangiosarcoma was made.  相似文献   

Trends in fluoroquinolone resistance of bacteria isolated from canine urinary tracts.     

Leah A Cohn  Anthony T Gary  William H Fales  Richard W Madsen 《Journal of veterinary diagnostic investigation》2003,15(4):338-343

Fluoroquinolone (FQ) antimicrobial agents are used extensively in human and veterinary medicine. Widespread use of any antimicrobial agent can apply selective pressure on populations of bacteria, which may result in an increase in the prevalence of antimicrobial-resistant isolates. Antimicrobial-susceptibility data on bacteria isolated from the canine urinary tract by the University of Missouri-Columbia Veterinary Medical Diagnostic Laboratory, Columbia, MO, were used to determine whether there has been an increase in the prevalence of FQ-resistant bacteria over time. Between January 1992 and December 2001, minimum inhibitory concentrations of either ciprofloxacin (1992-1998) or enrofloxacin (1998-2001) were determined for 1,478 bacterial isolates from the canine urinary tract. The predominant bacterial species isolated were Escherichia coli (547 isolates), Proteus mirabilis (156), and Staphylococcus intermedius (147). In all, there were 13 bacterial species with more than 25 isolates each. A significant increase in the overall proportion of resistant bacterial isolates was documented from 1992 to 2001 (Cochran-Armitage test for trend, P < 0.0001). The same increase in resistant isolates was documented when either ciprofloxacin or enrofloxacin was analyzed separately (P < 0.0001 and P < 0.0002, respectively). No difference was detected in rates of bacterial FQ resistance with regard to the sex of the dog from which the bacteria were isolated. The frequency with which some bacterial species were isolated differed with the sex of the infected dog. Proteus mirabilis was found more often in females (P < 0.0001), whereas beta hemolytic Streptococcus spp., were found more often in males (P = 0.0003). Although the overall efficacy of FQ antimicrobials remained high with greater than 80% of isolates being susceptible, the data demonstrated an increase in the proportion of resistant bacteria isolated from the urinary tract of the dog.  相似文献   

Acquired portosystemic shunting in two cats.     

Paige Langdon  Leah A Cohn  John M Kreeger  Nelson H Priddy 《Journal of the American Animal Hospital Association》2002,38(1):21-27

Acquired portosystemic shunts (PSS) are a clinical entity distinct from congenital PSS. Their apparent incidence in cats is low, which may reflect the rarity of predisposing hepatic parenchymal disease, such as cirrhosis, in this species. Two cats with acquired PSS associated with primary hepatobiliary disease are described. Relevant findings in acquired PSS are discussed, as are potential reasons for the apparently low incidence in the cat.  相似文献   

The effect of diflubenzuron upon larvae of the geometrid Boarmia (Ascotis) selenaria on avocado leaves     

K. R. Simon Ascher  Manes Wysoki  Nadia E. Nemny  Leah Gur-Telzak 《Pest management science》1978,9(3):219-224

Small (70 mg) Boarmia selenaria larvae fed for 4 days on avocado leaves or alfalfa dipped in aqueous diflubenzuron suspensions suffered from severe developmental disturbances. Similar results were obtained with leaves sprayed in an avocado orchard, with which, in addition, the considerable persistence of diflubenzuron under field conditions could be demonstrated. The substance was also active by topical application against large (500–600 mg) B. selenaria larvae, whereas by contact it was only moderately toxic. Some other non-conventional control agents, viz., the antifeedant AC-24055 and several juvenile hormone analogues, were of medium and negligible activity, respectively, against this insect.  相似文献   

Seed morphological characteristics,storage behavior,and germination pattern of Combretum indicum (L.) DeFilipps     

Gentallan  Renerio P.  Bartolome  Michael Cedric B.  Cejalvo  Reneliza D.  Timog  Emmanuel Bonifacio S.  Altoveros  Nestor C.  Borromeo  Teresita H.  Endonela  Leah E. 《Genetic Resources and Crop Evolution》2021,68(7):2767-2773

Genetic Resources and Crop Evolution - Combretum indicum (L.) DeFilipps seeds have anthelmintic properties and are recognized to be medicinal; however, the array of their morphological characters,...  相似文献   

The speciation of some tributyltin compounds using Mössbauer spectroscopy in different estuarine sediments     

Leopold May  Leah Berhane  Menna Berhane  Charles Counsil  Matthew Keane  Benjamin B. Reed  George Eng 《Water, air, and soil pollution》1994,75(3-4):293-306

The speciation of several tributyltin (TBT) compounds used in marine antifouling paints was studied by tin Mössbauer spectroscopy in both spiked anoxic and oxic estuarine sediments. These compounds included TBT acetate, chloride, fluoride, and oxide. To assist in the determination of the products, possible speciation products were also examined: TBT carbonate, sulfate, and sulfide. The study indicated that TBTF remains in its polymeric form after interaction with both types of sediments. TBT sulfate is unaltered in the spiked sediments. The data reported in this paper support the hypothesis that the speciation of the other TBT compounds examined in spiked sediments depends upon the nature of the sediment.  相似文献   

Effect of heat stress on the growth,root sugars,acid invertase and protein profile of pepper seedlings following transplanting     

B. Aloni  Leah Karni  Jaleh Daie 《The Journal of Horticultural Science and Biotechnology》2013,88(5):717-725

The development of pepper transplants is sensitive to the prevailing temperature in the field. High temperatures immediately after transplanting pepper seedlings delay their development in the field. During nine days of post-transplanting heat stress (30/25°C or 35/25°C, day/night temperature regimes), root and shoot growth were inhibited compared to the control transplants (25/18°C) with a significant decline in total protein and soluble acid invertase activity in the roots of the heat stressed plants. Acid invertase activity was less sensitive to the heat stress in the leaves than in the roots. A significant reduction in the root invertase activity occurred as early as two days after the beginning of the stress. Transplanting caused a 72% inhibition in the carbon allocation to the roots, compared with the non-transplanted seedlings. Exposure to heat after transplanting did not further reduce carbon allocation to the roots. The protein profile on SDS-PAGE from leaves shows that during the heat stress, some heat related proteins were synthesized concomitant with the reduction in the synthesis of constitutive proteins. In the roots, the synthesis of heat related proteins was barely detectable with no visible changes in the protein profile. The results suggest that roots are more sensitive to heat stress than leaves, possibly because they are less able to synthesize heat related proteins. The causal relationship between protein synthesis during heat stress and the performance of the transplants is not well understood.  相似文献   

The susceptibility of pepper (Capsicum annuum) to heat induced flower abscission: Possible involvement of ethylene     

B. Aloni  Leah Karni  Z. Zaidman  Y. Riov  M. Huberman  R. Goren 《The Journal of Horticultural Science and Biotechnology》2013,88(5):923-928

SUMMARY

Heat stress causes abscission of flowers in pepper plants and thus reduces yield. In the present study, we investigated the involvement of ethylene in heat-stress related flower abscission, by comparing the response of flowers of bell pepper, cv. Maor, known to be sensitive to flower abscission, and flowers of paprika, cv. Lehava, a resistant cultivar of Capsicum annuum. Their differing susceptibilities to high temperatures depend on light. Under high-temperature, high-light conditions, bell pepper was less susceptible than paprika, but, under high-temperature low-light, bell pepper was more susceptible. At high temperatures, flower explant abscission was much higher with bell pepper than paprika. Ethylene production (EP) by bell pepper explants reached a maximum at 34°C and decreased at higher temperatures (42 and 48 C), while in paprika EP rates were lower and reached the maximum at 42°C. Explants of bell pepper flowers were more susceptible to exogenous ethephon than paprika flowers. The sensitivity of a collection of pepper cul-tivars to heat induced flower abscission was more closely correlated with their flower sensitivity to ethephon than with the flower EP rate. We suggest that the differential susceptibility of bell pepper and paprika to heat stress is a result of both different ethylene production by their flowers and their differing sensitivities to ethylene produced under high-temperature stress. However, the sensitivity of the flower to ethylene may be more important in inducing their abscission.  相似文献   

The effect of root restriction on the incidence of blossom-end rot in bell pepper (Capsicum annuum L.)     

L. Karni  A. Bar-Tal  S. Moreshet  M. Keinan  C. Yao 《The Journal of Horticultural Science and Biotechnology》2013,88(3):364-369

Summary

Water and calcium uptake are important factors affecting the incidence of fruit blossom-end rot (BER) in tomato and pepper. In the present study an attempt was made to manipulate these factors by severe root pruning and to examine the effect on BER in greenhouse-grown bell pepper (Capsicum annuum L., cv. Mazurka). Pepper plants were transplanted, with the root system split into four separated compartments, each containing a single root quarter. Removal of half, or three quarters, of the root from fruit-bearing plants significantly reduced fruit BER incidence compared with plants with intact roots, especially in fruits which were at the rapid expansion stage at the beginning of the treatments. Removal of three quarters of the root reduced midday leaf water potential, stomatal conductance, and plant height. The number and weight of fruits were not affected by these treatments. Root pruning caused only a slight reduction in stem sap flow, as measured by the heat pulse technique. Calcium concentrations in the distal part of fruits from quarter-root-plants were higher than in fruits from non-pruned plants, whereas magnesium and potassium concentrations were not affected. On the other hand, in the leaves, calcium, magnesium and potassium concentrations were all reduced by root pruning. The K/Ca ratio decreased in the blossom-end of the fruits and increased in the leaves of root-pruned compared with control plants. The results suggest that root pruning did not affect the total uptake of calcium, apparently driven by transpiration, but did enhance calcium partitioning to the developing fruit. Root pruning also affected calcium distribution within the fruit and therefore attenuated BER incidence.  相似文献   

The potential of transforming simple structured pine plantations into mixed Mediterranean forests through natural regeneration along a rainfall gradient     

Yagil Osem  Ela Zangy  Eitan Bney-Moshe  Yosi Moshe  Naftali Karni  Yehuda Nisan 《Forest Ecology and Management》2009

The aim was to study the potential for using natural regeneration as a basis for transformation of simply structured conifer plantations into mixed Mediterranean forests. We studied the variation along a rainfall gradient, in the natural regeneration of tree species in the understory of planted 40- to 50-year-old Aleppo pine (Pinus halepensis) forests. The study was conducted within the Mediterranean zone of Israel, which extends from the semiarid northern Negev desert (rainfall ca. 300 mm yr⁻¹) in the south to the humid Upper Galilee in the north (ca 900 mm yr⁻¹). Cover and height, density, and species composition of regenerating trees were measured on south- and north-facing slopes in forest sites of comparable silvicultural history (site preparation methodology, planting density and thinning regime) distributed along the rainfall gradient. Altogether, 12 species of regenerating native broadleaved trees were found in the understory of the various forest sites. Surface cover, density and species richness increased linearly along the entire rainfall gradient, on both north- and south-facing slopes, ranging from zero in the driest forest sites up to 85% cover, 7980 trees ha⁻¹ and 4.5 species per 200 m², respectively, in the most humid ones. Species composition of regenerating trees was also related to rainfall amount, through changes in the relative importance of species along the rainfall gradient. The effect of topographic aspect on tree regeneration was inconsistent, i.e., the interaction Rainfall × Aspect was significant. Nevertheless, the general trend showed better regeneration on north-facing slopes. Most of the regenerating trees in the understory were small, i.e., less than 100 cm in height, with no clear effect of rainfall amount and topographic aspect on the relative abundance of height classes. Regeneration by Aleppo pine was highly variable among and within the different forest sites and ranged from 0 to 1565 trees ha⁻¹, with no clear relationships with rainfall amount and topographic aspect. In light of our results we propose that the future structure of forests should vary with respect to annual rainfall amount within possible silvicultural scenarios.  相似文献