scholarly journals Characterization of the Microanatomy and Histopathology of Placentas From Aborted, Stillborn, and Normally Delivered Alpacas (Vicugna pacos) and Llamas (Lama glama)

2011 ◽  
Vol 49 (2) ◽  
pp. 313-321 ◽  
Author(s):  
D. L. Schaefer ◽  
R. J. Bildfell ◽  
P. Long ◽  
C. V. Löhr
Keyword(s):  
Placental Insufficiency ◽  
State University ◽  
Diagnostic Laboratory ◽  
Crown Rump Length ◽  
Routine Testing ◽  
Vicugna Pacos ◽  
Microscopic Features ◽  
Lama Glama ◽  
Oregon State University

From 2002 to 2007, 101 camelid abortions and stillbirths were submitted to the Veterinary Diagnostic Laboratory at Oregon State University (84 alpacas [ Vicugna pacos], 13 llamas [ Lama glama], 4 unknown). For most cases ( n = 67), a cause was not determined by routine testing. Eighty-five submissions included placenta for microscopic examination, of which 55 were from abortions to unknown causes (idiopathic). Microscopic features of placentas from abortion/stillbirth were compared with those from 19 camelids delivered normally (6 alpacas, 12 llamas, 1 unknown) and with those from 4 alpaca fetuses of known gestational age collected during the dam’s necropsy. The most common microscopic findings in abortion/stillbirth placentas were mineralization ( n = 57) and mucinous edema ( n = 27) of the chorioallantoic stroma. One or more of these features were also observed in 22 of 23 placentas from normal pregnancies/deliveries and therefore interpreted as incidental findings. The comparison of alpaca placentas after matching for gestational parameters (crown–rump length, weight, days of gestation; n = 41) revealed hypoplasia of placental villi in 5 of 22 idiopathic abortions and in 1 abortion due to umbilical torsion; hypoplasia was further suspected in an additional 6 abortions of unknown cause and 2 abortions of known cause. The identified villous hypoplasia is assumed to have resulted in placental insufficiency. When placental insufficiency is included as cause, idiopathic abortions are reduced from 66.2 to 47.9% of alpaca cases with histopathologic examination of placenta and from 66.3 to 52.5% of alpaca and llama abortions overall. This study also permitted the generation of a linear regression curve correlating alpaca fetal crown–rump length with fetal age.

Characterization of Podosphaera macularis Derived from the Hop Cultivar ‘Strata’ and Strata’s Resistance to Powdery Mildew in Oregon

2021 ◽  
Author(s):  
Mary Block ◽  
Michele S. Wiseman ◽  
David H. Gent
Keyword(s):  
Powdery Mildew ◽  
Disease Risk ◽  
Severe Disease ◽  
Patent Application ◽  
State University ◽  
Single Chain ◽  
Differential Cultivars ◽  
Oregon State University ◽  
Podosphaera Macularis

Powdery mildew is one of the most destructive diseases of hop. Host resistance is a most efficient means of managing the disease, but resistance may not be durable. The cultivar Strata was developed by Oregon State University, and the patent application stated the plant was resistant to powdery mildew based on initial greenhouse screening and 8 years of observations at three locations in western Oregon. In 2019, powdery mildew colonies were reported in a commercial yard of Strata near Woodburn, Oregon. Two clonal isolates of Podosphaera macularis were isolated via single-chain transfers from colonies and characterized by inoculating each of seven differential cultivars. Cultivars with Rb, R3, and R5 were susceptible to the isolates. The susceptibility of Strata to powdery mildew was characterized by inoculating seven isolates of P. macularis with known virulences onto leaves of Strata. Sporulation appeared on Strata leaves with all of the differential isolates independent of their specific virulence, but only at trace levels with isolates possessing V6-virulence. Strata-derived isolates were phenotypically indistinguishable from Cascade-adapted isolates when inoculated onto the cultivars Cascade, Strata, and Symphony, as only Strata-derived and Cascade-adapted isolates could cause severe disease on Cascade and Strata. Like Cascade-adapted isolates, Strata-derived isolates also lack virulence on hop plants possessing the R-gene R6. These findings should inform both disease risk assessment in the field and future breeding tactics and strategies involving Strata. Further characterization of Strata is warranted to determine if its resistance is under the same genetic control as Cascade.

scholarly journals Measurement of IgG Concentration in Ovine Fetal Fluids: A Useful Diagnostic Test

1989 ◽  
Vol 1 (2) ◽  
pp. 128-131 ◽  
Author(s):  
Olaf Hedstrom ◽  
Robert Sonn ◽  
Peggy Dearing ◽  
Stanley P. Snyder ◽  
E. Duane Lassen
Keyword(s):  
Diagnostic Test ◽  
Routine Laboratory ◽  
State University ◽  
Laboratory Procedure ◽  
Diagnostic Laboratory ◽  
Antibody Titers ◽  
Fetal Fluid ◽  
Ovine Fetal ◽  
Oregon State University ◽  
Fetal Fluids

The Veterinary Diagnostic Laboratory at Oregon State University received 172 aborted ovine fetuses during the 1985–1987 lambing seasons; from 120 of these, body fluids were evaluated for IgG levels. Fifty-two (43%) of the fetal fluids had immunoglobulin G (IgG) levels greater than 15 mg/dl. Forty-five (87%) of the fluids with elevated IgG levels were confirmed or presumed toxoplasma or Chlamydia abortions. A mean fetal fluid IgG concentration of 111.5 ± 78 mg/dl was found for the 26 toxoplasma abortions; for the 19 Chlamydia abortions, a mean IgG concentration of 109 ± 91 mg/dl was found. Antibody titers equal to or greater than 1:40 against Toxoplasma gondii were detected in 23 fetal fluids. Fetal fluid IgG concentration less than 15 mg/dl was found to be associated with bacterial organisms (i.e., Campylobacter sp.) as the confirmed or presumed cause of abortion. These results suggest that measurement of fetal fluid IgG concentration is a useful, supportive diagnostic test in determining the cause of ovine abortion, and should be included as a routine laboratory procedure for ovine abortion diagnosis.

Ultrastructural Studies of Bovine Respiratory Disease Complex

1975 ◽  
Vol 33 ◽  
pp. 428-429
Author(s):  
James C.S. Kim
Keyword(s):  
Michigan State University ◽  
State University ◽  
Diagnostic Laboratory ◽  
Ultrastructural Studies ◽  
Bovine Respiratory Diseases ◽  
Etiologic Agents ◽  
Diagnostic Difficulties ◽  
The Subject ◽  
Capillary Walls ◽  
Alveolar Capillary

Bovine respiratory diseases cause serious economic loses and present diagnostic difficulties due to the variety of etiologic agents, predisposing conditions, parasites, viruses, bacteria and mycoplasma, and may be multiple or complicated. Several agents which have been isolated from the abnormal lungs are still the subject of controversy and uncertainty. These include adenoviruses, rhinoviruses, syncytial viruses, herpesviruses, picornaviruses, mycoplasma, chlamydiae and Haemophilus somnus.Previously, we have studied four typical cases of bovine pneumonia obtained from the Michigan State University Veterinary Diagnostic Laboratory to elucidate this complex syndrome by electron microscopy. More recently, additional cases examined reveal electron opaque immune deposits which were demonstrable on the alveolar capillary walls, laminae of alveolar capillaries, subenthothelium and interstitium in four out of 10 cases. In other tissue collected, unlike other previous studies, bacterial organisms have been found in association with acute suppurative bronchopneumonia.

scholarly journals Characterization of Chromium Compensated GaAs Sensors with the Charge-Integrating JUNGFRAU Readout Chip by Means of a Highly Collimated Pencil Beam

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1550
Author(s):  
Dominic Greiffenberg ◽  
Marie Andrä ◽  
Rebecca Barten ◽  
Anna Bergamaschi ◽  
Martin Brückner ◽  
...  
Keyword(s):  
Low Noise ◽  
State University ◽  
Noise Performance ◽  
X Ray ◽  
A Value ◽  
Resolution Capability ◽  
Sensor Properties ◽  
Pixel Pitch ◽  
Lower Noise

Chromium compensated GaAs or GaAs:Cr sensors provided by the Tomsk State University (Russia) were characterized using the low noise, charge integrating readout chip JUNGFRAU with a pixel pitch of 75 × 75 µm2 regarding its application as an X-ray detector at synchrotrons sources or FELs. Sensor properties such as dark current, resistivity, noise performance, spectral resolution capability and charge transport properties were measured and compared with results from a previous batch of GaAs:Cr sensors which were produced from wafers obtained from a different supplier. The properties of the sample from the later batch of sensors from 2017 show a resistivity of 1.69 × 109 Ω/cm, which is 47% higher compared to the previous batch from 2016. Moreover, its noise performance is 14% lower with a value of (101.65 ± 0.04) e− ENC and the resolution of a monochromatic 60 keV photo peak is significantly improved by 38% to a FWHM of 4.3%. Likely, this is due to improvements in charge collection, lower noise, and more homogeneous effective pixel size. In a previous work, a hole lifetime of 1.4 ns for GaAs:Cr sensors was determined for the sensors of the 2016 sensor batch, explaining the so-called “crater effect” which describes the occurrence of negative signals in the pixels around a pixel with a photon hit due to the missing hole contribution to the overall signal causing an incomplete signal induction. In this publication, the “crater effect” is further elaborated by measuring GaAs:Cr sensors using the sensors from 2017. The hole lifetime of these sensors was 2.5 ns. A focused photon beam was used to illuminate well defined positions along the pixels in order to corroborate the findings from the previous work and to further characterize the consequences of the “crater effect” on the detector operation.

scholarly journals Why Age Matters to Higher Education: Age-Friendly Tools and Techniques for Culture Change

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 551-551
Author(s):  
David Burdick ◽  
Karen Rose ◽  
Dana Bradley
Keyword(s):  
University Presidents ◽  
Steering Committee ◽  
State University ◽  
Community Members ◽  
University Leadership ◽  
Drexel University ◽  
College Of Nursing ◽  
Tools And Techniques ◽  
The University ◽  
Oregon State University

Abstract Momentum is growing for the Age-Friendly University Network as proponents, primarily gerontology educators, have successfully encouraged university presidents to sign nonbinding pledged to become more age-friendly in programs and policies, endorsing 10 Age-Friendly University Principles. While this trend is inspiring, more is needed to fully achieve benefits for universities, students, communities, and older adults. Four presentations discuss innovative ways of deepening university commitment, weaving the principles into the fabric of the university. The first paper describes thematic content analysis from five focus groups with admissions and career services staff at Washington University in St. Louis and the recommendations that emerged for the provision of programs and services for post-traditional students. The second paper describes efforts to utilize community-impact internships and community partnerships to build support for Age-Friendly University initiatives at Central Connecticut State University, particularly in the context of the university’s recent Carnegie Foundation Engaged Campus designation. The third paper describes how Drexel University became Philadelphia’s first Age-Friendly University and current efforts in the Drexel College of Nursing and Heatlh Care Profession’s AgeWell Collaboratory to convene university-wide leadership for an AFU Steering Committee working on four mission-driven efforts to ensure AFU sustainability. The fourth paper describes steps taken by AFU proponents at Western Oregon State University to gain endorsement from university leadership and community, including mapping the 10 AFU Principles to the university’s strategic plan, faculty senate endorsement, and survey/interview results of older community members’ use of the university, which collectively have enhanced deeper and broader campus buy-in of AFU.

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