Search results for: Henk J. Bertschinger

Items from 1 to 7 out of 7 results

article

Effects of an anti‐gonadoliberin releasing hormone vaccine on testicular, epididymal and spermatogenic development in the horse

Alma E. Botha, Martin L. Schulman, John Birrell, Lizette Plessis, more

Reproduction in Domestic Animals > 57 > 8 > 919 - 927

The effects of the GnRH vaccine Improvac^® on testicular and epididymal morphometrics, histology and spermatogenesis were measured in 19 young (15–20 months) colts randomly assigned to one control (saline, castration at 57 days, n = 6) or either of two GnRH vaccine‐treatment groups, T‐57 (castration at 57 days, n = 7) or T‐100 (castration at 100 days, n = 6), respectively. All were immunized on Day...

article

Vaccination against GnRH as a prelude to surgical castration of horses

John R. Birrell, Martin L. Schulman, Alma E. Botha, André Ganswindt, more

Equine Veterinary Journal > 53 > 6 > 1141 - 1149

Background Surgical castration is one of the most frequently performed surgeries in horses and is associated with various post‐surgical complications ranging in severity. Objectives We investigated the effects of administering an anti‐GnRH vaccine to colts for reduction of testis size on the incidence of complications associated with their subsequent surgical castration. Study design Randomised...

article

Behavioral and adrenocortical responses of captive white rhino adolescents to the introduction of a new calf

María Cayetana Fàbregas, André Ganswindt, Geoffrey T. Fosgate, Henk J. Bertschinger, more

acta ethologica > 2019 > 22 > 3 > 227-231

Changes in group composition are not exclusive to zoos and conservation breeding centers. The recent increase in poaching of African rhino species has accelerated the arrival of orphan calves at rehabilitation centers. Introducing new members into an existing group is often stressful for many mammal species. However, when young animals are involved, such responses may be reduced or absent. The goal...

article

Ovarian function following immunocontraceptive vaccination of mares using native porcine and recombinant zona pellucida vaccines formulated with a non-Freund's adjuvant and anti-GnRH vaccines

Margaret B. Nolan, Henk J. Bertschinger, Robyn Roth, Michael Crampton, more

Theriogenology > 2018 > 120 > C > 111-116

An important determinant in the selection of any contraceptive agent is the impact on ovarian function, both in the short and longer term. In this study, ovarian activity was monitored in mares immunised with one of the following vaccine formulations; native porcine zona pellucida (pZP), recombinant zona pellucida proteins ZP3 and ZP4 (reZP), pZP and reZP combined or a commercially available anti-GnRH...

article

Ovarian dysfunction associated with zona pellucida–based immunocontraceptive vaccines

Carolynne J. Joonè, Martin L. Schulman, Henk J. Bertschinger

Theriogenology > 2017 > 89 > Complete > 329-337

Despite more than 40 years of research into zona pellucida (ZP)–based vaccines, relatively little is known about their mechanism of action. Early research demonstrated precipitation of ZP glycoproteins by antiovarian antiserum, rendering oocytes resistant to sperm binding in vitro. Subsequent work showed significantly decreased fertilization rates following passive immunization, sparking interest...

article

Seasonal changes in steroid hormone profiles, body weight, semen quality, and the reproductive tract in captive African wild dogs (Lycaon pictus) in South Africa

Annie E. Newell-Fugate, Johan O. Nöthling, Henk J. Bertschinger

General and Comparative Endocrinology > 2012 > 178 > 2 > 272-281

Characterization of reproductive seasonality in the African wild dog (Lycaon pictus) could assist reintroduction programs. Male wild dogs (n=14) were assessed quarterly (January, mid-summer; April, late summer; August, late winter; November, early summer) for serum testosterone, body weight, testicular and prostatic volume, preputial gland measurement, and ejaculate characteristics. Bi-monthly fecal...

article

Molecular detection of Babesia rossi and Hepatozoon sp. in African wild dogs (Lycaon pictus) in South Africa

Paul Tshepo Matjila, Andrew L. Leisewitz, Frans Jongejan, Henk J. Bertschinger, more

Veterinary Parasitology > 2008 > 157 > 1-2 > 123-127

Blood specimens from wild dogs (n=301) were obtained from De Wildt Cheetah and Wildlife Centre (Pretoria) and five game reserves (4 in the North-West Province and 1 in Limpopo Province), South Africa. Specimens were screened for Babesia, Theileria, Hepatozoon and Ehrlichia/Anaplasma species using PCR and Reverse Line Blot (RLB) assays. Positive results were obtained in 18 (6%) wild dogs. Sixteen specimens...

Filter options

Publication date

Last 3 years (1)

Close

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

From:

To:
Set your own date range

Keywords

Data set

Elsevier (4)
Wiley (2)
Springer (1)

Journal

Theriogenology (2)
Equine Veterinary Journal (1)
General and Comparative Endocrinology (1)
Reproduction in Domestic Animals (1)
Veterinary Parasitology (1)
acta ethologica (1)

INFONA - science communication portal

Search results for: Henk J. Bertschinger

Effects of an anti‐gonadoliberin releasing hormone vaccine on testicular, epididymal and spermatogenic development in the horse

Vaccination against GnRH as a prelude to surgical castration of horses

Behavioral and adrenocortical responses of captive white rhino adolescents to the introduction of a new calf

Ovarian function following immunocontraceptive vaccination of mares using native porcine and recombinant zona pellucida vaccines formulated with a non-Freund's adjuvant and anti-GnRH vaccines

Ovarian dysfunction associated with zona pellucida–based immunocontraceptive vaccines

Seasonal changes in steroid hormone profiles, body weight, semen quality, and the reproductive tract in captive African wild dogs (Lycaon pictus) in South Africa

Molecular detection of Babesia rossi and Hepatozoon sp. in African wild dogs (Lycaon pictus) in South Africa

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options