The gestational window during which Brucella infection commonly causes abortion in dogs is?

The gestational window during which Brucella infection commonly causes abortion in dogs is?

• A. 20-35 days
• B. 35-45 days
• C. 60-75 days
• D. 45-60 days

Answer: (D)

Brucella canis tends to cause abortion in the late stages of pregnancy, when placental infection disrupts nutrient exchange and fetal growth. In dogs, pregnancy runs about 63 days on average, so the period from roughly 45 to 60 days is the late gestation window during which placental vulnerability is highest. This makes abortions most commonly occur in that 45–60 day range. Earlier gestation abortions are less typical for this organism, and near-term or post-term abortions are less common than the late-gestation window. Hence, 45–60 days best fits the typical Brucella canis abortion window.

Brucella canis tends to cause abortion in the late stages of pregnancy, when placental infection disrupts nutrient exchange and fetal growth. In dogs, pregnancy runs about 63 days on average, so the period from roughly 45 to 60 days is the late gestation window during which placental vulnerability is highest. This makes abortions most commonly occur in that 45–60 day range. Earlier gestation abortions are less typical for this organism, and near-term or post-term abortions are less common than the late-gestation window. Hence, 45–60 days best fits the typical Brucella canis abortion window.