INVESTIGADORES
NAVA Santiago
congresos y reuniones científicas
Título:
Preliminary analysis of the seasonality of immature and adults stages of Amblyomma parvum (Acari: Ixodidae) in Argentina.
Autor/es:
NAVA S, MANGOLD AJ, GUGLIELMONE AA
Lugar:
Ribeirao Preto, San Pablo, Brasil.
Reunión:
Congreso; Congresso Brasileiro de Parasitologia Veterinaria & II Simposio Latino-Americano de Rickettsioses.; 2006
Resumen:
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Amblyomma parvum is
a Neotropical tick whose adults in Argentina has been found on several
mammals species, being frequently detected on cattle and goats. Recent studies
in this country show that Caviidae rodents (Galea
musteloides) are suitable hosts for the immature stages. With the aim to
depict the seasonality of A. parvum, cattle,
goats and G. musteloides were monthly
examined from January 2005 to May 2006 in Quilino, Córdoba Province, Argentina.
Larvae were found on G. musteloides from
March to July, with a peak in May (first year Prevalence (P):100% Mean (M):
74.83; second year P: 81%, M: 66.15) , and nymphs from June to August, with the
peak in July (P: 100%, M: 18.80). Adults were detected from November to April,
with the high infestation in January and February in cattle (first year P:100%,
M: 6.10; second year P: 100%, M: 6.45) and goats (first year P:100%, M: 8; second year P: 100%, M: 7.15).
These preliminary results indicate that A.
parvum has one generation per year, with larvae predominating in autumn,
nymphs in winter and adults in spring-summer. The interval between the
appearance of parasitic nymphs (June) to first adults (November) suggest that
nymphal diapause may regulate the cycle of A.
parvum. Nevertheless, additional studies are needed to confirm this
hypothesis
