The Experts below are selected from a list of 8148 Experts worldwide ranked by ideXlab platform
Sharon Joseph - One of the best experts on this subject based on the ideXlab platform.
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endocrine patterns associated with reproduction in the nile hippopotamus hippopotamus amphibius as assessed by fecal progestagen analysis
General and Comparative Endocrinology, 2002Co-Authors: Laura H Graham, Kelly Reid, Tricia Webster, Mary Richards, Sharon JosephAbstract:Abstract The hippopotamus ( Hippopotamus amphibius ) is a popular Zoo Animal and an integral part of wetland ecosystems in its native continent of Africa. However, information about the reproductive physiology of the hippopotamus is limited compared to the other megaherbivores of Africa such as the elephant and the rhinoceros. This study is the first to report on the endocrine patterns associated with ovulation and pregnancy in the Nile hippopotamus. Fecal samples were collected 3 times per week from female hippopotami ( N =9) housed in captivity in Florida. Progesterone metabolites were extracted from the feces with 80% MeOH and quantified using a progestagen EIA. Fecal progestagen analysis indicated hippopotami had a cycle length of 35.3±1.3 days and ovulated throughout the year. Fecal progestagen concentrations during pregnancy ( N =11 pregnancies) were higher on average (833.5±115.2 ng/g; P
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Endocrine patterns associated with reproduction in the Nile hippopotamus (Hippopotamus amphibius) as assessed by fecal progestagen analysis.
General and comparative endocrinology, 2002Co-Authors: Laura H Graham, Kelly Reid, Tricia Webster, Mary Richards, Sharon JosephAbstract:The hippopotamus (Hippopotamus amphibius) is a popular Zoo Animal and an integral part of wetland ecosystems in its native continent of Africa. However, information about the reproductive physiology of the hippopotamus is limited compared to the other megaherbivores of Africa such as the elephant and the rhinoceros. This study is the first to report on the endocrine patterns associated with ovulation and pregnancy in the Nile hippopotamus. Fecal samples were collected 3 times per week from female hippopotami (N = 9) housed in captivity in Florida. Progesterone metabolites were extracted from the feces with 80% MeOH and quantified using a progestagen EIA. Fecal progestagen analysis indicated hippopotami had a cycle length of 35.3 +/- 1.3 days and ovulated throughout the year. Fecal progestagen concentrations during pregnancy (N = 11 pregnancies) were higher on average (833.5 +/- 115.2 ng/g; P < 0.05) than those observed during non-pregnant luteal phases (309.5 +/- 20.9 ng/g) and remained elevated throughout gestation. Fecal progestagen analysis revealed the onset of puberty in three females between 3 and 4 years of age and all conceived by their fourth cycle. Lactational suppression of ovulation during nursing was usually, but not always, observed and lasted for 33.9 +/- 1.8 weeks. The observed calving interval in females with lactational anovulation was 17 months. The majority of births (63.6%) occurring during the summer rainy season and the inconsistency of lactational anovulation suggested the possibility of environmental influences on reproduction.
Laura H Graham - One of the best experts on this subject based on the ideXlab platform.
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endocrine patterns associated with reproduction in the nile hippopotamus hippopotamus amphibius as assessed by fecal progestagen analysis
General and Comparative Endocrinology, 2002Co-Authors: Laura H Graham, Kelly Reid, Tricia Webster, Mary Richards, Sharon JosephAbstract:Abstract The hippopotamus ( Hippopotamus amphibius ) is a popular Zoo Animal and an integral part of wetland ecosystems in its native continent of Africa. However, information about the reproductive physiology of the hippopotamus is limited compared to the other megaherbivores of Africa such as the elephant and the rhinoceros. This study is the first to report on the endocrine patterns associated with ovulation and pregnancy in the Nile hippopotamus. Fecal samples were collected 3 times per week from female hippopotami ( N =9) housed in captivity in Florida. Progesterone metabolites were extracted from the feces with 80% MeOH and quantified using a progestagen EIA. Fecal progestagen analysis indicated hippopotami had a cycle length of 35.3±1.3 days and ovulated throughout the year. Fecal progestagen concentrations during pregnancy ( N =11 pregnancies) were higher on average (833.5±115.2 ng/g; P
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Endocrine patterns associated with reproduction in the Nile hippopotamus (Hippopotamus amphibius) as assessed by fecal progestagen analysis.
General and comparative endocrinology, 2002Co-Authors: Laura H Graham, Kelly Reid, Tricia Webster, Mary Richards, Sharon JosephAbstract:The hippopotamus (Hippopotamus amphibius) is a popular Zoo Animal and an integral part of wetland ecosystems in its native continent of Africa. However, information about the reproductive physiology of the hippopotamus is limited compared to the other megaherbivores of Africa such as the elephant and the rhinoceros. This study is the first to report on the endocrine patterns associated with ovulation and pregnancy in the Nile hippopotamus. Fecal samples were collected 3 times per week from female hippopotami (N = 9) housed in captivity in Florida. Progesterone metabolites were extracted from the feces with 80% MeOH and quantified using a progestagen EIA. Fecal progestagen analysis indicated hippopotami had a cycle length of 35.3 +/- 1.3 days and ovulated throughout the year. Fecal progestagen concentrations during pregnancy (N = 11 pregnancies) were higher on average (833.5 +/- 115.2 ng/g; P < 0.05) than those observed during non-pregnant luteal phases (309.5 +/- 20.9 ng/g) and remained elevated throughout gestation. Fecal progestagen analysis revealed the onset of puberty in three females between 3 and 4 years of age and all conceived by their fourth cycle. Lactational suppression of ovulation during nursing was usually, but not always, observed and lasted for 33.9 +/- 1.8 weeks. The observed calving interval in females with lactational anovulation was 17 months. The majority of births (63.6%) occurring during the summer rainy season and the inconsistency of lactational anovulation suggested the possibility of environmental influences on reproduction.
Valerie Allendorf - One of the best experts on this subject based on the ideXlab platform.
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assessing the occurrence of the novel Zoonotic variegated squirrel bornavirus 1 in captive squirrels in germany a prevalence study
Zoonoses and Public Health, 2021Co-Authors: Valerie Allendorf, Christina Frank, Dennis Rubbenstroth, Kore Schlottau, Donata Hoffmann, Susanne Amler, Martin Beer, Franz Josef Conraths, Timo HomeierbachmannAbstract:The newly described Zoonotic variegated squirrel bornavirus 1 (VSBV-1) in German squirrel holdings has been associated with the death of three private owners and one Zoo Animal caretaker (confirmed cases). Epidemiological investigations were severely impeded by the general lack of data on holdings of the putative reservoir hosts, the family Sciuridae. To fill this lack of data for detailed epidemiological investigations of the captive squirrel population, a register of private and Zoological squirrel holdings was established. The findings show a broad variety of kept species and their frequency distribution. By contacting the different stakeholders via Web-based social groups and societies, information passed in both directions so that disease awareness could be raised and participants could be recruited for further studies. Cross-sectional studies revealed a prevalence of VSBV-1-positive subpopulations of 0% (95% CI 0%-6.2%) among private squirrel collections and 1.9% (95% CI: 0%-9.9%) among Zoos in Germany. The approach presented here can be transferred to other populations of non-traditional pets, which may be equally difficult to monitor, in the case of an emerging Zoonotic infectious disease.
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Analysis of exotic squirrel trade and detection of human infections with variegated squirrel bornavirus 1, Germany, 2005 to 2018
Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2019Co-Authors: Dennis Tappe, Christina Frank, Timo Homeier-bachmann, Hendrik Wilking, Valerie Allendorf, César Muñoz-fontela, Monika Rottstegge, Julia R Port, Jürgen RisslandAbstract:Following the discovery in 2015 of the variegated squirrel bornavirus 1 (VSBV-1) in fatal encephalitis cases among exotic squirrel breeders and a Zoo Animal caretaker in Germany, a case definition was developed. It was employed during trace-back Animal trade investigations and sero-epidemiological studies among breeders and Zoo Animal caretakers of holdings with VSBV-1 infected squirrels. During the investigation, two possible human cases who had died of encephalitis were identified retrospectively among the squirrel breeders. Moreover, one probable human case was detected among the breeders who had a positive memory T-cell response to VSBV-1 antigen and antibodies against VSBV-1. The low rate of seropositivity found among living persons in risk groups that handle exotic squirrels privately or at Zoos may reflect rareness of exposure to VSBV-1 during Animal contact, a high lethality of infection or a combination of these factors. As a precaution against human exposure, testing of exotic squirrels for VSBV-1 infection and/or avoiding direct contact with exotic squirrels in Zoos and private holdings is strongly advised.
Timo Homeierbachmann - One of the best experts on this subject based on the ideXlab platform.
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assessing the occurrence of the novel Zoonotic variegated squirrel bornavirus 1 in captive squirrels in germany a prevalence study
Zoonoses and Public Health, 2021Co-Authors: Valerie Allendorf, Christina Frank, Dennis Rubbenstroth, Kore Schlottau, Donata Hoffmann, Susanne Amler, Martin Beer, Franz Josef Conraths, Timo HomeierbachmannAbstract:The newly described Zoonotic variegated squirrel bornavirus 1 (VSBV-1) in German squirrel holdings has been associated with the death of three private owners and one Zoo Animal caretaker (confirmed cases). Epidemiological investigations were severely impeded by the general lack of data on holdings of the putative reservoir hosts, the family Sciuridae. To fill this lack of data for detailed epidemiological investigations of the captive squirrel population, a register of private and Zoological squirrel holdings was established. The findings show a broad variety of kept species and their frequency distribution. By contacting the different stakeholders via Web-based social groups and societies, information passed in both directions so that disease awareness could be raised and participants could be recruited for further studies. Cross-sectional studies revealed a prevalence of VSBV-1-positive subpopulations of 0% (95% CI 0%-6.2%) among private squirrel collections and 1.9% (95% CI: 0%-9.9%) among Zoos in Germany. The approach presented here can be transferred to other populations of non-traditional pets, which may be equally difficult to monitor, in the case of an emerging Zoonotic infectious disease.
Kelly Reid - One of the best experts on this subject based on the ideXlab platform.
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endocrine patterns associated with reproduction in the nile hippopotamus hippopotamus amphibius as assessed by fecal progestagen analysis
General and Comparative Endocrinology, 2002Co-Authors: Laura H Graham, Kelly Reid, Tricia Webster, Mary Richards, Sharon JosephAbstract:Abstract The hippopotamus ( Hippopotamus amphibius ) is a popular Zoo Animal and an integral part of wetland ecosystems in its native continent of Africa. However, information about the reproductive physiology of the hippopotamus is limited compared to the other megaherbivores of Africa such as the elephant and the rhinoceros. This study is the first to report on the endocrine patterns associated with ovulation and pregnancy in the Nile hippopotamus. Fecal samples were collected 3 times per week from female hippopotami ( N =9) housed in captivity in Florida. Progesterone metabolites were extracted from the feces with 80% MeOH and quantified using a progestagen EIA. Fecal progestagen analysis indicated hippopotami had a cycle length of 35.3±1.3 days and ovulated throughout the year. Fecal progestagen concentrations during pregnancy ( N =11 pregnancies) were higher on average (833.5±115.2 ng/g; P
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Endocrine patterns associated with reproduction in the Nile hippopotamus (Hippopotamus amphibius) as assessed by fecal progestagen analysis.
General and comparative endocrinology, 2002Co-Authors: Laura H Graham, Kelly Reid, Tricia Webster, Mary Richards, Sharon JosephAbstract:The hippopotamus (Hippopotamus amphibius) is a popular Zoo Animal and an integral part of wetland ecosystems in its native continent of Africa. However, information about the reproductive physiology of the hippopotamus is limited compared to the other megaherbivores of Africa such as the elephant and the rhinoceros. This study is the first to report on the endocrine patterns associated with ovulation and pregnancy in the Nile hippopotamus. Fecal samples were collected 3 times per week from female hippopotami (N = 9) housed in captivity in Florida. Progesterone metabolites were extracted from the feces with 80% MeOH and quantified using a progestagen EIA. Fecal progestagen analysis indicated hippopotami had a cycle length of 35.3 +/- 1.3 days and ovulated throughout the year. Fecal progestagen concentrations during pregnancy (N = 11 pregnancies) were higher on average (833.5 +/- 115.2 ng/g; P < 0.05) than those observed during non-pregnant luteal phases (309.5 +/- 20.9 ng/g) and remained elevated throughout gestation. Fecal progestagen analysis revealed the onset of puberty in three females between 3 and 4 years of age and all conceived by their fourth cycle. Lactational suppression of ovulation during nursing was usually, but not always, observed and lasted for 33.9 +/- 1.8 weeks. The observed calving interval in females with lactational anovulation was 17 months. The majority of births (63.6%) occurring during the summer rainy season and the inconsistency of lactational anovulation suggested the possibility of environmental influences on reproduction.
