A study on Theileria parva bovis carrier state

In two trials, Theileria parva bovis (which causes ‘January disease’ of cattle in Zimbabwe) produced a carrier state, over the 7–12 months after infection. Very severe clinical reactions were caused by infections from small numbers (29–43) of adult Rhipicephalus appendiculatus ticks, which had engor...

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Bibliographic Details
Published inPreventive veterinary medicine Vol. 12; no. 3; pp. 197 - 203
Main Authors Koch, H.T., Norval, R.A.I., Ocama, J.G.R., Munatswa, F.C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.1992
Subjects
BOVIN
CATTLE
DISEASE TRANSMISSION
GANADO BOVINO
RHIPICEPHALUS APPENDICULATUS
THEILERIA PARVA
TRANSMISION DE ENFERMEDADES
TRANSMISSION DES MALADIES
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Summary:In two trials, Theileria parva bovis (which causes ‘January disease’ of cattle in Zimbabwe) produced a carrier state, over the 7–12 months after infection. Very severe clinical reactions were caused by infections from small numbers (29–43) of adult Rhipicephalus appendiculatus ticks, which had engorged on immunized cattle in the field. The transmission from healthy recovered cattle housed indoors was less efficient, even with high numbers of ticks (300). Two out of seven attempts were successful and disease reactions were rather severe. A non-pathogenic Theileria assumed to be Theileria taurotragi was transmitted in three out of seven attempts.
Bibliography:L72
9202430
ISSN:0167-5877
1873-1716
DOI:10.1016/0167-5877(92)90049-L