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Monitoring female reproductive function by measurement of fecal estrogen and progesterone metabolites in the white-faced saki (Pithecia pithecia)
(Wiley-Liss, 1994)
A simple method for extracting and measuring ovarian steroids in feces is
applied to the ovarian cycle, pregnancy, parturition, and period of lacta tional amenorrhea in Pithecia pithecia. Small amounts of wet, unmixed ...
Morphological features of the seminiferous and cauda Epididymides epithelia of breeding zebu bulls with normal and decreased testicular consistency
(The Society for Reproduction and Development, 1999)
The fine morphology of the testes and epididymes collected from breeding Zebu (Bos indicus) bulls with normal or decreased testicular consistency (TC) at clinical palpation was studied. The ultrastructure of testicles with ...
Event-time analysis of reproductive traits of dairy heifers
(Elsevier, 1998-11)
Data on the reproductive traits of dairy heifers
were analyzed using event-time techniques. Traits
analyzed were age at first calving (n = 4631), days to
first breeding, and days open (n = 1992) during the
first ...
Analysis of test day yield data of Costa Rican dairy cattle
(Elsevier, 1998)
Estimates of variance components for test day
records in an animal model that considered multiple
traits over multiple lactations were calculated using
REML methodology. Test day records were classified
into 11 periods ...
Tail stump sperm defect as a cause of sterility in an indobrasil (Bus indicus) bull
(Blackwell Wissenschafts-Verlag, Berlin, 1998)
The first known case of an Indobrasil (BOA indicus) bull, with a
frequency of 100% of the specific sperm abnormality, known
as ‘tail stump sperm defect’ is reported. A 5-year old bull was
located as a breeding sire in ...
Genome evolution within the alpha Proteobacteria: why do some bacteria not possess plasmids and others exhibit more than one diferent chromosome?
(Elsevier, 1998)
Animal intracellular Proteobacteria of the alpha subclass without plasmids and containing one or more chromosomes are
phylogenetically entwined with opportunistic, plant-associated, chemoautotrophic and photosynthetic ...
Zymodeme and serodeme characterization of Leishmania Isolates obtained from Costa Rican patients
(Instituto Oswaldo Cruz, 1998-05)
Human leishmaniasis is widespread through-
out Central America and constitutes an important
public health problem. Annual incidence is esti-
mated to be about 20,000 cases (Carreira et al.
1995), of which 4,000 to ...
Prevalence and risk factors for Trichomonas foetus infection in cattle in northeastern Costa Rica
(Elsevier, 1992-05-27)
Two studies (one pilot and one cross-sectional) were conducted in the two main livestock-rearing
areas of Costa Rica using an improved method (In-Pouch TF) for the detection of Trichomonas
foetus infection in bulls. Herd ...
Rotavirus and coronavirus outbreak: etiology of annual diarrhea in Costa Rican children
(Universidad de Costa Rica, 1997)
In Costa Rica, an annual outbreak of infant diarrheal disease (December and January) was reported since
1976, and rotavirus was incriminated 1ater as the main etiological agent (1976-1981). Apparently the disease has not ...
Determinación de la presencia del virus de la mixomatosis en conejos domésticos de Costa Rica
(Universidad Nacional, Costa Rica, 1994)
Se hizo un estudio retrospectivo en los archivos del Laboratorio de Patología de la Escuela de Medicina Veterinaria de la Universidad Nacional abarcando el período de 1976 a 1992, en el cual demostró evidencia histopatológica ...