Author:
Yamamoto Naoki,Nishimura Ryo,Gunji Yosuke,Hishinuma Mitsugu
Abstract
Abstract. The relationship between endometritis and cystic ovarian disease (COD)
is still unclear in Japanese Black cattle. Endometritis is classified into
clinical endometritis (CE) and subclinical endometritis (SE). The objective
of this study was to clarify the interaction between postpartum endometritis
(CE and SE) and COD in Japanese Black cattle. Twenty-six suckled cows with
COD (COD group) and 16 suckled cows with cyclical ovarian activity (CA
group) were submitted for the experiment. Uterine conditions of cows were
classified into three groups (normal, CE, and SE) with vaginal mucus test and
endometrial cytology. The combined data of CE and SE were represented as data
for total endometritis (EMT total). The prevalence of EMT total in the COD group
(42.3 %, 11∕26) was significantly higher than that of the CA group (12.5 %,
2∕16). The mean percentage of polymorphonuclear neutrophils (PMN %) in the COD
group was significantly higher than that of the CA group at 40–60 DPP (days postpartum). Compared
to 61–295 DPP, the mean PMN % at 40–60 DPP was significantly higher in the
COD group. The diameters of uterine horn and cervix did not differ among
normal uterine condition, CE and SE in the COD group, and they did not differ
between normal uterine condition and SE in the CA group. However, endometrial
thickness during both 40–60 and 61–295 DPP were greater in the COD group than in the CA
group. In conclusion, Japanese Black cattle with COD have a potential
implication on endometritis at 40–60 DPP compared to the normal ovarian cycle.
As a specific symptom was not observed by transrectal ultrasonography,
endometrial cytology is effective for diagnosis of SE in Japanese Black
cattle.
Cited by
2 articles.
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