Goats reinfected with Toxoplasma gondii: loss of viable prolificacy and gross revenue
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Data
2015
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Resumo
We determined the reproductive parameters and clinical disorders in pregnant goats infected and
reinfected with Toxoplasma gondii, and posteriorly the loss of gross revenue due to congenital
toxoplasmosis was estimated. Of the 25 non-pregnant females negative for T. gondii, 20 were orally
inoculated (ME 49 strain) and of these, 15 pregnant females chronically infected were orally reinoculated
(VEG strain) with T. gondii oocysts. Five groups were formed (n=5): GI, GII and GIII (reinoculations at
40, 80 and 120 days of gestation, respectively), GIV (inoculation) and GV (no inoculation). Clinical and
serological exams were performed on days 0 (prior to inoculation), 3, 6 9, 15 and 21 and every 7 days
post-inoculation. Exams were also performed on day 3 and every 7 days post-reinoculation. Reproductive
management was performed on all females and initiated when the females infected displayed IgG titers
IFAT<1,024. From the average prolificacy indexes of each experimental group were estimated: total
production of kilograms of live weight (total kg LW) of goats for slaughter, gross revenue and loss of
gross revenue in U.S. dollars (US$), designed for a herd of 1,000 matrices. The unviable prolificacy
indexes were 0.8 (GI), 1.2 (GII) and 0.2 (GIII). Clinical disorders affected 57.1% (GI), 75.0% (GII) and
16.7% (GIII) of the offspring of goats reinfected with T. gondii. Congenital toxoplasmosis in goats
reinfected resulted in the loss of 26.5% of gross revenues, being GI (US$ 10,577.60 or 57.1%) and GII
(US$ 12,693.12 or 60%) holders of the highest values and percentages of economic losses. It was found
that congenital toxoplasmosis reinfection cause clinical disorders in goats chronically infected with T.
gondii and their offspring with birth of unviable animals and loss of gross revenue, at different stages of
pregnancy (40, 80 and 120 days of gestation), being in the initial and intermediate stages of pregnancy the
largest estimates of these losses.
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Cabras gestantes, Distúrbios clínicos, Toxoplasmose caprina, Caprine toxoplasmosis, Clinical disorders, Pregnant does
Citação
SILVA, H. M.; PEREIRA, M. M.; OLIVEIRA, T. A.; ALMEIDA, H. M. S.; BRESCIANI, K. D. S.; SANTANA, L. F.; SOARES, V. E.; LOPES, W. D. Z.; CASTANHEIRA, T. L. L.; COSTA, A. J. Goats reinfected with Toxoplasma gondii: loss of viable prolificacy and gross revenue. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 67, n. 5, p. 1279-1286, 2015.