Avaliação de um protocolo de desmame precoce segregado medicado para a eliminação de Actinobacillus pleuropneumoniae

Tamiozzo, Pablo Jesús; Carranza, Alicia Isabel; Pelliza, Bibiana Rosa; Parada, Julián; Ambrogi, Arnaldo

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MICROBIOLOGY • Cienc. Rural 48 (7) • 2018 • https://doi.org/10.1590/0103-8478cr20170367 copiar

Avaliação de um protocolo de desmame precoce segregado medicado para a eliminação de Actinobacillus pleuropneumoniae

Autoria SCIMAGO INSTITUTIONS RANKINGS

RESUMO:

Para avaliar o sucesso de um protocolo de desmame precoce segregado medicado para a eliminação de Actinobacillus pleuropneumoniae, dez lotes consecutivos de 100 suínos por lote desmamados aos 7-9 dias de idade foram monitorados às 21-22 semanas de idade procurando a presença de tosse produtiva, presença de anticorpos contra o agente e lesões pulmonares compatíveis com pleuropneumonia no abate. Além disso, as tonsilas inteiras foram processadas para a identificação de A. pleuropneumoniae por isolamento bacteriológico e nested PCR usando um método direto. Os resultados serológicos (1,4%) e PCR (3,5%) positivos sugerem que não foi possível erradicar em todos os lotes, mesmo usando um protocolo de desmame precoce segregado medicado.

Palavras-chave:
suíno; pleuropneumonia; Actinobacillus pleuropneumoniae; eliminação; desmame precoce segregado medicado

Autoria

Pablo Jesús Tamiozzo ^*E-mail: ptamiozzo@ayv.unrc.edu.ar. *Corresponding author.

Departamento de Patología Animal, Facultad de Agronomía y Veterinaria, Universidad Nacional de Río Cuarto (UNRC), Ruta 36 Km 601, Río Cuarto, 5800, Córdoba, República Argentina. Universidad Nacional de Río Cuarto (UNRC)ArgentinaCórdoba, ArgentinaDepartamento de Patología Animal, Facultad de Agronomía y Veterinaria, Universidad Nacional de Río Cuarto (UNRC), Ruta 36 Km 601, Río Cuarto, 5800, Córdoba, República Argentina.

https://orcid.org/0000-0002-4501-9026

Alicia Isabel Carranza

https://orcid.org/0000-0003-3412-6739

Bibiana Rosa Pelliza

https://orcid.org/0000-0003-2661-6658

Julián Parada

Consejo Nacional de Investigaciones Científicas y técnicas (CONICET), República Argentina.Consejo Nacional de Investigaciones Científicas y técnicas (CONICET)República ArgentinaRepública ArgentinaConsejo Nacional de Investigaciones Científicas y técnicas (CONICET), República Argentina.

https://orcid.org/0000-0003-0223-0128

Arnaldo Ambrogi

E-mail: ptamiozzo@ayv.unrc.edu.ar. *Corresponding author.

DECLARATION OF CONFLICTS OF INTEREST

The authors declare no conflict of interest. The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish results.

SCIMAGO INSTITUTIONS RANKINGS

Figuras | Tabelas

Figuras (1)
Tabelas (1)

Thumbnail

Figure 1
Graphic representation of the segregated medicated early weaning protocol for A. pleuropneumoniae elimination. Herd A was a multi-site, 4500-sow commercial herd that supplied replacement gilts to the herd B located 500km away. In Herd A, a partial depopulation program for Mycoplasma hyopneumoniae had been carried out previously to this study. Herd B was a brand new facilities multi-site 4500-sow farm. In herd A, 10 consecutive batches of sows with a parity number of 3 (P3) or higher were treated with antibiotics during the last 25 days of gestation and throughout the entire lactation period. Then, 10 consecutive batches of 360 piglets each were early weaned, medicated and transferred weekly to herd B. At piglets’ arrival, Herd B had only one site III with two barns. Each barn was divided into four rooms. Each room had 34 pens with space for 35 animals each with capacity for 1190 pigs. So each barn had room for 4760 animals and site III had capacity for 9520 animals. Each room was filled with two batches of piglets (720 pigs by room -inoccupation of total space). One barn was filled in eight weeks (8 batches of piglets) and the remaining two batches were housed in one room of the adjacent barn of the same site III. Piglets were reared in the same pens where they had arrived. Once these animals reached sexual maturity and after phenotypic selection the discarded animals were followed until slaughter. Selected gilts were served and gestated in site III and were just transferred to site I at the moment of delivery.

Thumbnail

Table 1
Number (percentages) of ApxIV ELISA, nPCR from tonsils and lung lesions detection out of total pigs tested from ten batches of 21-22 weeks old pigs.

Figure 1 Graphic representation of the segregated medicated early weaning protocol for A. pleuropneumoniae elimination. Herd A was a multi-site, 4500-sow commercial herd that supplied replacement gilts to the herd B located 500km away. In Herd A, a partial depopulation program for Mycoplasma hyopneumoniae had been carried out previously to this study. Herd B was a brand new facilities multi-site 4500-sow farm. In herd A, 10 consecutive batches of sows with a parity number of 3 (P3) or higher were treated with antibiotics during the last 25 days of gestation and throughout the entire lactation period. Then, 10 consecutive batches of 360 piglets each were early weaned, medicated and transferred weekly to herd B. At piglets’ arrival, Herd B had only one site III with two barns. Each barn was divided into four rooms. Each room had 34 pens with space for 35 animals each with capacity for 1190 pigs. So each barn had room for 4760 animals and site III had capacity for 9520 animals. Each room was filled with two batches of piglets (720 pigs by room -inoccupation of total space). One barn was filled in eight weeks (8 batches of piglets) and the remaining two batches were housed in one room of the adjacent barn of the same site III. Piglets were reared in the same pens where they had arrived. Once these animals reached sexual maturity and after phenotypic selection the discarded animals were followed until slaughter. Selected gilts were served and gestated in site III and were just transferred to site I at the moment of delivery.

Table 1 Number (percentages) of ApxIV ELISA, nPCR from tonsils and lung lesions detection out of total pigs tested from ten batches of 21-22 weeks old pigs.

Batches	Apx IV ELISA	direct nPCR from tonsils	Pleuropneumonia - compatible lung lesions
1	0/100 (0)	3/50 (6)	12/32 (37.5)
2	0/100 (0)	0/29 (0)	1/26 (3.8)
3	4/100 (4)	0/24 (0)	N/D
4	1/100 (1)	0/30 (0)	N/D
5	1/100 (1)	1/35 (2.8)	1/28 (3.6)
6	2/100 (2)	1/18 (5.5)	0/40 (0)
7	1/100 (1)	0/26 (0)	3/45 (6.6)
8	1/100 (1)	3/41 (7.3)	2/31 (6.4)
9	2/100 (2)	2/30 (6.6)	0/15 (0)
10	2/100 (2)	1/32 (3.1)	0/25 (0)
TOTAL	14/1000 (1.4)	11/315 (3.5)	19/242 (7.8)

N/D: Not determined.

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Avaliação de um protocolo de desmame precoce segregado medicado para a eliminação de Actinobacillus pleuropneumoniae

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[1] E-mail: ptamiozzo@ayv.unrc.edu.ar. *Corresponding author.