Chemoprophylaxis of Theileria annulata and Theileria parva infections of calves with buparvaquone.
Vet Parasitol
; 78(1): 1-12, 1998 Jul 17.
Article
en En
| MEDLINE
| ID: mdl-9703615
ABSTRACT
A clinical trial testing the prophylactic effect of a 5 mg kg-1 dose of buparvaquone on either Theileria annulata or Theileria parva experimental infections of calves demonstrated its efficacy for periods of at least seven days. The drug given 1 h or seven days before 50% lethal T. annulata sporozoite infection protected all eight calves, but prophylaxis was insufficient after 14 days to protect two out of four calves from severe reaction. When immunity was challenged by a lethal second parasite dose a month after the first, all these calves were immune. In the T. parva trial, calves given drug 1 h or seven days before a 25% lethal infection underwent minimal reaction, but some were over-protected and were susceptible to a similar challenge sporozoite dose. Although drug levels remaining 14 days after prophylaxis protected these calves from the mild challenge, some parameters measured were within the range of the 'no drug' control group. These results indicated the effectiveness of a single 5 mg kg-1 dose of buparvaquone for more than seven days but also the potential risk of its use in the infection and treatment method of immunisation. It is suggested that there may be circumstances where simple field prophylactic treatment with buparvaquone may be beneficial.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Theileriosis
/
Naftoquinonas
/
Theileria parva
/
Theileria annulata
/
Antiprotozoarios
Límite:
Animals
Idioma:
En
Revista:
Vet Parasitol
Año:
1998
Tipo del documento:
Article
País de afiliación:
Reino Unido
Pais de publicación:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS