Tick burden and acquisition of immunity to Theileria parva by Tarime cattle in comparison to Sukuma cattle under different tick control regimes in the Lake Zone of Tanzania
| Autor: | Anjello Joseph Mwilawa, Emmanuel Levillal Katamboi Laisser, Robinson H. Mdegela, S.W. Chenyambuga, P. S. Gwakisa, Lughano Kusiluka, Esron D. Karimuribo, G. Msalya, Maulilio John Kipanyula |
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| Rok vydání: | 2016 |
| Předmět: |
Veterinary medicine
Tick infestation biology 040301 veterinary sciences Theileria parva 0402 animal and dairy science Prevalence 04 agricultural and veterinary sciences Tick biology.organism_classification medicine.disease 040201 dairy & animal science Virology 0403 veterinary science parasitic diseases medicine East Coast fever Seroprevalence Tick Control Nested polymerase chain reaction |
| Zdroj: | Journal of Veterinary Medicine and Animal Health. 8:21-28 |
| ISSN: | 2141-2529 |
| Popis: | This study was conducted to determine tick burden and immunological parameters of resistance to East Coast fever (ECF) in Tarime and Sukuma cattle. Tick load, packed cell volume (PCV), Theileria parva (T. parva) specific antibody percent positivity (PP), and prevalence of T. parva parasites were studied in relation to dipping regime, strains, and season. A total of 50 experimental cattle were included in this study. Tick load was determined by whole body counts, antibody percent positivity was determined by the polymorphic immunodominant molecule (PIM)-based T. parva enzyme-linked immunosorbent assay (ELISA), and prevalence of T. parva parasites was detected by a nested polymerase chain reaction (PCR) based on the p104 gene. Dipping frequency on tick burden showed no statistically significant differences when cattle of either strain were dipped either once every 2 or 3 weeks in the dry and wet seasons. However, Tarime cattle had higher (p 0.05). During the study period, 20% (5/25) of Sukuma cattle contracted ECF, but none of the Tarime cattle showed clinical signs for the disease. The differences between the two strains shown in terms of PP and T. parva parasite prevalence may indicate the ability of individual cattle to resist tick infestation and ECF infection under natural challenge. Higher antibody levels but lower parasite prevalence attained by Tarime cattle, suggests inherent ability of Tarime cattle to resist clinical development of ECF infection, but to remain as T. parva carriers. Key words: Carrier state, Theileria parva, ticks, seropositivity. |
| Databáze: | OpenAIRE |
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