No abstract

No abstract

Laying hens were inoculated intravaginally (IVg) once (IVg-single) or three times (IVg-triple), intracloacally (IC), or intravenously (IV) with Salmonella enteritidis (SE) phage type 4. Eggs tested were significantly (P < 0.05) fewer positive in group IC than in other groups. SE was recovered from egg contents in the groups IVg-single (9.6%), IVg-triple (4.2%), and IV (11.5%). IVg and IC inoculation resulted in colonization of the cloaca and lower portions of the oviduct but not the portion above the isthmus, whereas IV inoculation resulted in colonization of the entire oviduct. Only IV inoculation resulted in colonization of the ovary. In group IV, SE was recovered from three of six eggs found in the oviduct at necropsy, but in other groups, SE was not recovered from 53 eggs in the oviduct. The results suggested that the SE infection of vagina resulted in a frequent incidence of contaminated eggs and that SE adhered to the eggs from the contaminated vagina might pass through shells and shell membranes.

The COVID‐19 pandemic and mandatory social distancing has brought challenges to anatomy educators who generally need in‐person classes. The purpose of this study is to share the experience of a distant online lecture on a surgical procedure and related anatomy in a three‐dimensional (3D) virtual reality (VR) workspace and to compare it with reported teaching methods, that is, an in‐person class and a Zoom online class. The lecture was delivered by three authors of this article in a VR workspace that enables people to meet through VR. The lectures were about combinations of dental surgical procedures and related clinical anatomy. Physically, the attendees could have been located anywhere in the world, so lecturers joined from the United States and the attendees were all from Japan. VR environment and its flexibility enabled attendees to join the lecture actively, helping them to gain understanding of the surgical procedure and anatomy more efficiently. The use of VR technology with a live communication tool demonstrated in this study has several advantages over previous education methods, although there are still technical issues or disadvantages that need to be addressed. Development of the technology and app/software is required so that more data can be processed at higher speed. Use of VR technology with a live communication tool could be an alternative teaching method. Its overall advantages are a closer look at the slides/monitor and concurrent observation of the multiple assets in various directions by multiple attendees. These advantages cannot be achieved by any other teaching method without VR assets with the workspace provided by Spatial. Even during the mandatory social distancing due to the COVID‐19 pandemic, this could enable us to foster 3D understanding of surgery and related anatomy. Further study is now needed to evaluate the effectiveness of this newly proposed teaching method by comparing it with traditional in‐person and online classes with a live communication tool.

A series of bicyclic 1,2,4-triazol-3(2H)-one and 1,3,5-triazine-2,4(3H)-dione derivatives with a 4-[bis(4-fluoro-phenyl)methylene]piperidine or 4-(4-fluorobenzoyl)piperidine group has been prepared and tested for 5-HT2 and alpha 1 receptor antagonist activity. Among the compounds prepared, 2-[2-[4-[bis(4-fluorophenyl)methylene]-piperidin-1-yl]ethyl]- 5,6,7,8-tetrahydro-1,2,4-triazolo[4,3-a]pyridin-3(2H)-one (7b) had the most potent 5-HT2 antagonist activity, which was greater than ritanserin (2), while 7b did not show alpha 1 antagonist activity in vivo. The central 5-HT2 receptor antagonism was approximately 1/30 that of 2 when tested for the ability to block head twitches induced by 5-hydroxytryptophan. Compound 21b, 3-[2-[4-(4-fluorobenzoyl)piperidin-1-yl]ethyl]-6,7,8,9-tetrahydro- 2H- pyrido[1,2-a]-1,3,5-triazine-2,4(3H)-dione also displayed potent 5-HT2 antagonist activity. The compound had moderate alpha 1 receptor antagonism, and the potency inhibiting head twitches was about one-third that of ketanserin (1). These results indicate that 5,6,7,8-tetrahydro-1,2,4-triazolo[4,3-a]pyrimidin-3(2H)-one and 6,7,8,9-tetrahydro-2H-pyrido-[1,2-a]-1,3,5-triazine-2,4(3H)-dione ring systems are useful components of 5-HT2 antagonists.

No abstract

No abstract

The present study suggests that 5-HT released from platelets contributes to the initiation and progression of monocrotaline induced pulmonary hypertension.