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A viable calf with trisomy 22.

B Mayr, H Krutzler, H Auer

    Cytogenetics and Cell Genetics
    |January 1, 1985
    PubMed
    Summary
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    Trisomy 22 was identified in one malformed calf exhibiting umbilical hernia, urachus fistula, and brachygnathia inferior. This chromosomal abnormality did not prove lethal in the affected calf.

    Area of Science:

    • Veterinary Genetics
    • Animal Cytogenetics
    • Congenital Malformations in Cattle

    Background:

    • Congenital malformations in calves can arise from various genetic and environmental factors.
    • Karyotyping is a crucial diagnostic tool for identifying chromosomal abnormalities in animals.
    • Understanding the genetic basis of birth defects is vital for animal health and breeding programs.

    Purpose of the Study:

    • To investigate the chromosomal makeup of malformed calves.
    • To identify specific genetic anomalies, such as trisomy, associated with congenital defects in cattle.
    • To determine if detected trisomies are linked to specific physical malformations and assess their viability.

    Main Methods:

    • Karyotyping was performed on eight malformed calves to analyze their chromosomes.

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  • Detailed phenotypic examination was conducted on calves with identified chromosomal abnormalities.

    • Main Results:

    • Karyotyping revealed trisomy 22 in one of the eight examined calves.
    • The calf with trisomy 22 presented with clinical signs including umbilical hernia, urachus fistula, and mild brachygnathia inferior.
    • The identified trisomy 22 was not associated with lethality in this case.

    Conclusions:

    • Trisomy 22 is a detectable chromosomal abnormality in cattle.
    • This specific trisomy can manifest with a distinct set of congenital malformations.
    • The findings suggest that trisomy 22 may not be a lethal condition in affected calves.