Porcine epidemic diarrhea virus (PEDV) is an intestinal coronavirus that can cause porcine epidemic diarrhea, leading to diarrhea, vomiting, weight loss, and even death in piglets. Due to the diversity of PEDV strains, traditional vaccines are difficult to sustainably and effectively prevent and control PEDV. This article reviews the strategies and mechanisms of active substances in regulating intracellular signaling pathways, viral proteins, and microbial metabolites to enhance the host immune function against PEDV. It emphasizes the prevention of PEDV resistance and the potential harm of PEDV breaking through interspecies barriers to the human society, aiming to provide reliable theoretical support for the development of new antiviral drugs or vaccines.
Porcine epidemic diarrhea virus/immunology* ; Animals ; Swine ; Swine Diseases/prevention & control* ; Antiviral Agents/pharmacology* ; Coronavirus Infections/virology* ; Viral Vaccines/immunology* ; Humans ; Signal Transduction

Objective To examine the association between sleep and depressive symptoms among community-dwelling older adults and whether loneliness mediates this association.Methods Using a multistage sampling approach,we enrolled participants aged 60 years or older from two communities in Chengdu,China.A questionnaire was used to collect basic information,including age,sex,etc.,from the participants.In addition,loneliness,depressive symptoms,and sleep quality were assessed using a short-form University of California Los Angeles Loneliness Scale(ULS-8),the 10-item version of Center of Epidemiologic Studies Depression Scale(CESD-10),and the Pittsburgh Sleep Quality Index(PSQI),respectively.The Spearman rank correlation coefficient was employed to assess the correlations among social sleep,loneliness,and depression symptoms.Generalized structural equation modeling was used to assess the mediating effect of loneliness between sleep and depressive symptoms.Results Of the 1377 participants,32.03％(441)experienced loneliness and 30.57％(421)had depressive symptoms,with the median and interquartile range of their sleep quality being 6(3,9).Correlation analysis revealed statistically significant associations between sleep quality,loneliness,and depressive symptoms(P＜0.001).Generalized structural equation modeling analysis revealed that loneliness had a partial mediation effect on the association between sleep quality and depressive symptoms(b=0.075;95％CI,0.025-0.125;P＜0.05),accounting for 44.38％of the total effect(95％CI,0.258-0.630;P＜0.001).Conclusion Poor sleep quality is associated with a higher risk of depressive symptoms in community-dwelling older adults,with loneliness mediating the association.Further research on improving the sleep quality to mitigate depressive symptoms in older adults is warranted.Special attention should be given to older adults experiencing both poor sleep and loneliness.

Objective To translate the Maternal Childbirth Fatigue Perception Questionnaire(MCFQ)into Chinese and examine its reliability and validity among women undergoing vaginal deliv-ery.Methods Following the Brislin translation model,the MCFQ was translated,back-translated,culturally adapted and pre-tested to develop a Chinese version.By using the convenience sampling method,574 parturients were selected for a questionnaire survey from January to April 2024,and the reliability and validity of the Chinese questionnaire were evaluated.Results The Chinese version of MCFQ consisted of 3 dimensions and 13 items,namely physical fatigue(7 items),perceived fatigue(3 items)and emotional fatigue(3 items).The item-level content validity index ranged from0.813 to 1.000,and the scale-level content validity index was 0.938.The overall Cronbach's α coefficient of the scale was 0.870,and the split-half reliability coefficient was 0.848.Confirmatory factor analysis demonstrated that the question naire had a good fit.Conclusion The Chinese version of MCFQ has good reliability and validity and can be used as an effective tool to assess the fatigue level of parturients during the delivery process.It is helpful for clinical medical staff to optimize the management of the la-bor process,improve the quality of delivery,and ensure the safety of mothers and infants.

Objective:Using intrapartum ultrasound monitoring to observe and analyse the impact of upright sit-ting delivery on fetal head descent and maternal and infant outcomes during the second stage of labor.Methods:This study used a prospective randomized controlled study,including 110 pregnant women with full-term and com-plete opening of the cervix who were able to undergo vaginal delivery at Beijing Obstetrics and Gynecology Hospi-tal,Capital Medical University from February to September 2023.They were randomly divided into a control group(n=56)and an upright group(n=54)by simple randomization.The control group was delivered in routine supine or semi-supine positions,and the upright group was delivered in upright positions.The parturients in both groups were examined by color Doppler ultrasound at the beginning of the second stage of labor when the cervix was full-y opened to guide delivery and 30 minutes after guidance of the second stage of labor.Abdominal and perineal two-dimensional ultrasound was used to detect fetal head angle of progression(AOP),fetal head perineal dis-tance(HPD),and fetal orientation.At the same time,the time of the second stage of labor and delivery outcome were recorded.The changes in AOP,angle and position of HPD,delivery duration,and maternal and fetal out-comes between the two groups were analyzed.Results:At the beginning of the second stage of labor,there was no significant difference in AOP,HPD,and the rate of non-occipital anterior position of fetal position between the two groups(P＞0.05).After 30 minutes of guiding delivery,compared with the control group,the AOP angle in-creased,the HPD distance shortened,and the proportion of non-occipital anterior fetal position was reduced in the upright position group,and all the differences were statistically significant(P＜0.05).At the same time,compared with the control group,the spontaneous delivery rate,the duration of the second stage of labor,forceps delivery rate,lateral perineal incision rate,perineal edema rate,and oxytocin use rate were significantly decreased in the upright position group,and all the differences were statistically significant(P＜0.05).All newborns were born a-live,and the 1-minute Apgar score was 10 for all newborns in both groups.There was no significant difference in birth weight between the two groups(P＞0.05).Conclusions:When the parturient delivers in an upright sitting position in the second stage of labor,the AOP increases,the HPD shortens,and the time of the second stage of labor is accelerated to increase the natural delivery rate,reduce medical intervention,and reduce maternal and in-fant complications during delivery.

Objective:Using intrapartum ultrasound monitoring to observe and analyse the impact of upright sit-ting delivery on fetal head descent and maternal and infant outcomes during the second stage of labor.Methods:This study used a prospective randomized controlled study,including 110 pregnant women with full-term and com-plete opening of the cervix who were able to undergo vaginal delivery at Beijing Obstetrics and Gynecology Hospi-tal,Capital Medical University from February to September 2023.They were randomly divided into a control group(n=56)and an upright group(n=54)by simple randomization.The control group was delivered in routine supine or semi-supine positions,and the upright group was delivered in upright positions.The parturients in both groups were examined by color Doppler ultrasound at the beginning of the second stage of labor when the cervix was full-y opened to guide delivery and 30 minutes after guidance of the second stage of labor.Abdominal and perineal two-dimensional ultrasound was used to detect fetal head angle of progression(AOP),fetal head perineal dis-tance(HPD),and fetal orientation.At the same time,the time of the second stage of labor and delivery outcome were recorded.The changes in AOP,angle and position of HPD,delivery duration,and maternal and fetal out-comes between the two groups were analyzed.Results:At the beginning of the second stage of labor,there was no significant difference in AOP,HPD,and the rate of non-occipital anterior position of fetal position between the two groups(P＞0.05).After 30 minutes of guiding delivery,compared with the control group,the AOP angle in-creased,the HPD distance shortened,and the proportion of non-occipital anterior fetal position was reduced in the upright position group,and all the differences were statistically significant(P＜0.05).At the same time,compared with the control group,the spontaneous delivery rate,the duration of the second stage of labor,forceps delivery rate,lateral perineal incision rate,perineal edema rate,and oxytocin use rate were significantly decreased in the upright position group,and all the differences were statistically significant(P＜0.05).All newborns were born a-live,and the 1-minute Apgar score was 10 for all newborns in both groups.There was no significant difference in birth weight between the two groups(P＞0.05).Conclusions:When the parturient delivers in an upright sitting position in the second stage of labor,the AOP increases,the HPD shortens,and the time of the second stage of labor is accelerated to increase the natural delivery rate,reduce medical intervention,and reduce maternal and in-fant complications during delivery.

Objective:Using intrapartum ultrasound monitoring to observe and analyse the impact of upright sit-ting delivery on fetal head descent and maternal and infant outcomes during the second stage of labor.Methods:This study used a prospective randomized controlled study,including 110 pregnant women with full-term and com-plete opening of the cervix who were able to undergo vaginal delivery at Beijing Obstetrics and Gynecology Hospi-tal,Capital Medical University from February to September 2023.They were randomly divided into a control group(n=56)and an upright group(n=54)by simple randomization.The control group was delivered in routine supine or semi-supine positions,and the upright group was delivered in upright positions.The parturients in both groups were examined by color Doppler ultrasound at the beginning of the second stage of labor when the cervix was full-y opened to guide delivery and 30 minutes after guidance of the second stage of labor.Abdominal and perineal two-dimensional ultrasound was used to detect fetal head angle of progression(AOP),fetal head perineal dis-tance(HPD),and fetal orientation.At the same time,the time of the second stage of labor and delivery outcome were recorded.The changes in AOP,angle and position of HPD,delivery duration,and maternal and fetal out-comes between the two groups were analyzed.Results:At the beginning of the second stage of labor,there was no significant difference in AOP,HPD,and the rate of non-occipital anterior position of fetal position between the two groups(P＞0.05).After 30 minutes of guiding delivery,compared with the control group,the AOP angle in-creased,the HPD distance shortened,and the proportion of non-occipital anterior fetal position was reduced in the upright position group,and all the differences were statistically significant(P＜0.05).At the same time,compared with the control group,the spontaneous delivery rate,the duration of the second stage of labor,forceps delivery rate,lateral perineal incision rate,perineal edema rate,and oxytocin use rate were significantly decreased in the upright position group,and all the differences were statistically significant(P＜0.05).All newborns were born a-live,and the 1-minute Apgar score was 10 for all newborns in both groups.There was no significant difference in birth weight between the two groups(P＞0.05).Conclusions:When the parturient delivers in an upright sitting position in the second stage of labor,the AOP increases,the HPD shortens,and the time of the second stage of labor is accelerated to increase the natural delivery rate,reduce medical intervention,and reduce maternal and in-fant complications during delivery.

Objective:Using intrapartum ultrasound monitoring to observe and analyse the impact of upright sit-ting delivery on fetal head descent and maternal and infant outcomes during the second stage of labor.Methods:This study used a prospective randomized controlled study,including 110 pregnant women with full-term and com-plete opening of the cervix who were able to undergo vaginal delivery at Beijing Obstetrics and Gynecology Hospi-tal,Capital Medical University from February to September 2023.They were randomly divided into a control group(n=56)and an upright group(n=54)by simple randomization.The control group was delivered in routine supine or semi-supine positions,and the upright group was delivered in upright positions.The parturients in both groups were examined by color Doppler ultrasound at the beginning of the second stage of labor when the cervix was full-y opened to guide delivery and 30 minutes after guidance of the second stage of labor.Abdominal and perineal two-dimensional ultrasound was used to detect fetal head angle of progression(AOP),fetal head perineal dis-tance(HPD),and fetal orientation.At the same time,the time of the second stage of labor and delivery outcome were recorded.The changes in AOP,angle and position of HPD,delivery duration,and maternal and fetal out-comes between the two groups were analyzed.Results:At the beginning of the second stage of labor,there was no significant difference in AOP,HPD,and the rate of non-occipital anterior position of fetal position between the two groups(P＞0.05).After 30 minutes of guiding delivery,compared with the control group,the AOP angle in-creased,the HPD distance shortened,and the proportion of non-occipital anterior fetal position was reduced in the upright position group,and all the differences were statistically significant(P＜0.05).At the same time,compared with the control group,the spontaneous delivery rate,the duration of the second stage of labor,forceps delivery rate,lateral perineal incision rate,perineal edema rate,and oxytocin use rate were significantly decreased in the upright position group,and all the differences were statistically significant(P＜0.05).All newborns were born a-live,and the 1-minute Apgar score was 10 for all newborns in both groups.There was no significant difference in birth weight between the two groups(P＞0.05).Conclusions:When the parturient delivers in an upright sitting position in the second stage of labor,the AOP increases,the HPD shortens,and the time of the second stage of labor is accelerated to increase the natural delivery rate,reduce medical intervention,and reduce maternal and in-fant complications during delivery.

Objective:Using intrapartum ultrasound monitoring to observe and analyse the impact of upright sit-ting delivery on fetal head descent and maternal and infant outcomes during the second stage of labor.Methods:This study used a prospective randomized controlled study,including 110 pregnant women with full-term and com-plete opening of the cervix who were able to undergo vaginal delivery at Beijing Obstetrics and Gynecology Hospi-tal,Capital Medical University from February to September 2023.They were randomly divided into a control group(n=56)and an upright group(n=54)by simple randomization.The control group was delivered in routine supine or semi-supine positions,and the upright group was delivered in upright positions.The parturients in both groups were examined by color Doppler ultrasound at the beginning of the second stage of labor when the cervix was full-y opened to guide delivery and 30 minutes after guidance of the second stage of labor.Abdominal and perineal two-dimensional ultrasound was used to detect fetal head angle of progression(AOP),fetal head perineal dis-tance(HPD),and fetal orientation.At the same time,the time of the second stage of labor and delivery outcome were recorded.The changes in AOP,angle and position of HPD,delivery duration,and maternal and fetal out-comes between the two groups were analyzed.Results:At the beginning of the second stage of labor,there was no significant difference in AOP,HPD,and the rate of non-occipital anterior position of fetal position between the two groups(P＞0.05).After 30 minutes of guiding delivery,compared with the control group,the AOP angle in-creased,the HPD distance shortened,and the proportion of non-occipital anterior fetal position was reduced in the upright position group,and all the differences were statistically significant(P＜0.05).At the same time,compared with the control group,the spontaneous delivery rate,the duration of the second stage of labor,forceps delivery rate,lateral perineal incision rate,perineal edema rate,and oxytocin use rate were significantly decreased in the upright position group,and all the differences were statistically significant(P＜0.05).All newborns were born a-live,and the 1-minute Apgar score was 10 for all newborns in both groups.There was no significant difference in birth weight between the two groups(P＞0.05).Conclusions:When the parturient delivers in an upright sitting position in the second stage of labor,the AOP increases,the HPD shortens,and the time of the second stage of labor is accelerated to increase the natural delivery rate,reduce medical intervention,and reduce maternal and in-fant complications during delivery.

Objective:Using intrapartum ultrasound monitoring to observe and analyse the impact of upright sit-ting delivery on fetal head descent and maternal and infant outcomes during the second stage of labor.Methods:This study used a prospective randomized controlled study,including 110 pregnant women with full-term and com-plete opening of the cervix who were able to undergo vaginal delivery at Beijing Obstetrics and Gynecology Hospi-tal,Capital Medical University from February to September 2023.They were randomly divided into a control group(n=56)and an upright group(n=54)by simple randomization.The control group was delivered in routine supine or semi-supine positions,and the upright group was delivered in upright positions.The parturients in both groups were examined by color Doppler ultrasound at the beginning of the second stage of labor when the cervix was full-y opened to guide delivery and 30 minutes after guidance of the second stage of labor.Abdominal and perineal two-dimensional ultrasound was used to detect fetal head angle of progression(AOP),fetal head perineal dis-tance(HPD),and fetal orientation.At the same time,the time of the second stage of labor and delivery outcome were recorded.The changes in AOP,angle and position of HPD,delivery duration,and maternal and fetal out-comes between the two groups were analyzed.Results:At the beginning of the second stage of labor,there was no significant difference in AOP,HPD,and the rate of non-occipital anterior position of fetal position between the two groups(P＞0.05).After 30 minutes of guiding delivery,compared with the control group,the AOP angle in-creased,the HPD distance shortened,and the proportion of non-occipital anterior fetal position was reduced in the upright position group,and all the differences were statistically significant(P＜0.05).At the same time,compared with the control group,the spontaneous delivery rate,the duration of the second stage of labor,forceps delivery rate,lateral perineal incision rate,perineal edema rate,and oxytocin use rate were significantly decreased in the upright position group,and all the differences were statistically significant(P＜0.05).All newborns were born a-live,and the 1-minute Apgar score was 10 for all newborns in both groups.There was no significant difference in birth weight between the two groups(P＞0.05).Conclusions:When the parturient delivers in an upright sitting position in the second stage of labor,the AOP increases,the HPD shortens,and the time of the second stage of labor is accelerated to increase the natural delivery rate,reduce medical intervention,and reduce maternal and in-fant complications during delivery.

Objective:Using intrapartum ultrasound monitoring to observe and analyse the impact of upright sit-ting delivery on fetal head descent and maternal and infant outcomes during the second stage of labor.Methods:This study used a prospective randomized controlled study,including 110 pregnant women with full-term and com-plete opening of the cervix who were able to undergo vaginal delivery at Beijing Obstetrics and Gynecology Hospi-tal,Capital Medical University from February to September 2023.They were randomly divided into a control group(n=56)and an upright group(n=54)by simple randomization.The control group was delivered in routine supine or semi-supine positions,and the upright group was delivered in upright positions.The parturients in both groups were examined by color Doppler ultrasound at the beginning of the second stage of labor when the cervix was full-y opened to guide delivery and 30 minutes after guidance of the second stage of labor.Abdominal and perineal two-dimensional ultrasound was used to detect fetal head angle of progression(AOP),fetal head perineal dis-tance(HPD),and fetal orientation.At the same time,the time of the second stage of labor and delivery outcome were recorded.The changes in AOP,angle and position of HPD,delivery duration,and maternal and fetal out-comes between the two groups were analyzed.Results:At the beginning of the second stage of labor,there was no significant difference in AOP,HPD,and the rate of non-occipital anterior position of fetal position between the two groups(P＞0.05).After 30 minutes of guiding delivery,compared with the control group,the AOP angle in-creased,the HPD distance shortened,and the proportion of non-occipital anterior fetal position was reduced in the upright position group,and all the differences were statistically significant(P＜0.05).At the same time,compared with the control group,the spontaneous delivery rate,the duration of the second stage of labor,forceps delivery rate,lateral perineal incision rate,perineal edema rate,and oxytocin use rate were significantly decreased in the upright position group,and all the differences were statistically significant(P＜0.05).All newborns were born a-live,and the 1-minute Apgar score was 10 for all newborns in both groups.There was no significant difference in birth weight between the two groups(P＞0.05).Conclusions:When the parturient delivers in an upright sitting position in the second stage of labor,the AOP increases,the HPD shortens,and the time of the second stage of labor is accelerated to increase the natural delivery rate,reduce medical intervention,and reduce maternal and in-fant complications during delivery.