Results 191 to 200 of about 45,476 (245)

Isolate of Anaplasma marginale not transmitted by ticks

American Journal of Veterinary Research, 1986
SUMMARY The tick-borne transmissibility of 2 isolates of Anaplasma marginale was compared. Dermacentor variabilis were exposed to A marginale as nymphs by feeding on 1 of 4 splenectomized calves during periods of ascending parasitemia (maximum 49% to 81% parasitized erythrocytes) induced by injection of a stabilate.
R D, Smith, M G, Levy, M S, Kuhlenschmidt, J H, Adams, D L, Rzechula, T A, Hardt, K M, Kocan   +6 more
openaire   +2 more sources

High genetic diversity and superinfection by Anaplasma marginale strains in naturally infected Angus beef cattle during a clinical anaplasmosis outbreak in southeastern Brazil.

Ticks and Tick-borne Diseases, 2021
Anaplasma marginale is an obligate intracellular Gram-negative bacterium that is parasitic to erythrocytes and is the main agent of bovine anaplasmosis.
Amanda Barbosa Garcia, Márcia Mariza Gomes Jusi, C. Freschi, Inalda Angélica de Souza Ramos, Natália Serra Mendes, Renan Bressianini Do Amaral, L. R. Gonçalves, M. André, R. Z. Machado   +8 more
semanticscholar   +1 more source

Bovine Fetal Response to Anaplasma marginale

American Journal of Veterinary Research, 1971
SUMMARY Blood contaning 70% erythrocytes infected with Anaplasma marginale was inoculated into a 100-day-old bovine fetus in utero. At 41 days after inoculation, the fetus was removed from the cow by cesarean section. The fetal serum reacted positively (4+) to the complement-fixation test.
M S, Trueblood, B L, Swift, P D, Bear
openaire   +2 more sources

Gram-Staining Characteristics of Anaplasma marginale

American Journal of Veterinary Research, 1973
SUMMARY Purified erythrocyte-free suspensions of Anaplasma marginale were stained by Gram's method, Giemsa stain, acridine orange (ao) stain, and fluorescent antibody (fa) stain. Anaplasma marginale was observed to be gram-negative. Morphologic characteristics that were not discernible by the other methods were not detected by Gram's method.
T E, Amerault, V, Mazzola, T O, Roby
openaire   +2 more sources

Radioimmunoassay for Anaplasma marginale antibodies in cattle

American Journal of Veterinary Research, 1988
SUMMARY A radioimmunoassay is described for use in the detection of Anaplasma marginale antibodies in cattle sera. Optimal sensitivity and specificity were obtained by using 2 antigens, an A marginale antigen and a rbc antigen (obtained before infection was established) from the same calf. In addition, sera were preabsorbed with rbc from healthy cattle
C A, Schuntner, G, Leatch
openaire   +2 more sources

Anaplasma marginale in Bovine Erythrocyte Cultures

American Journal of Veterinary Research, 1980
SUMMARY Bovine erythrocytes infected with Anaplasma marginale were standardized with normal bovine erythrocytes at 1.4% and 3.5% parasitemia and cultured under low oxygen pressure at 37 C. The number of erythrocytes infected by A marginale appeared to increase 3.3-fold by day 11 and 4.5-fold by day 3, as determined by microscopic examination of Giemsa ...
V, Mazzola, K L, Kuttler
openaire   +2 more sources

Anaplasma marginale in tick cell culture

American Journal of Veterinary Research, 1989
SUMMARY Anaplasma marginale was propagated in a tick cell line derived from Dermacentor variabilis embryos. The rickettsial organism was identified and monitored in culture by transmission electron microscopy and the indirect immunofluorescence technique, using specific monoclonal antibodies.
R J, Hidalgo, E W, Jones, J E, Brown, A J, Ainsworth   +3 more
openaire   +2 more sources

Molecular epidemiology and associated risk factors of Anaplasma marginale and Theileria annulata in cattle from North-western Pakistan.

Veterinary parasitology, 2020
Ticks and tick-borne pathogens are one of the major threats to livestock production worldwide. The aim of present study is to specify the molecular epidemiology and its associated risk factors of two well-distributed tick-borne pathogens Anaplasma ...
Jehan Zeb, S. Shams, I. Ud Din, S. Ayaz, A. Khan, N. Nasreen, H. Khan, M. Khan, Haytham Senbill   +8 more
semanticscholar   +1 more source

Molecular and recombinant characterization of major surface protein 5 from Anaplasma marginale.

Acta Tropica, 2021
Anaplasmosis is a tick-borne disease caused by the intracellular rickettsia Anaplasma marginale, which affects cattle and other ruminants in both tropical and subtropical regions of the world, and also causing tremendous economic losses due to decreasing
Amaya Watthanadirek, W. Junsiri, Sutthida Minsakorn, Napassorn Poolsawat, Nitipon Srionrod, Pacharaporn Khumpim, R. Chawengkirttikul, Panat Anuracpreeda   +7 more
semanticscholar   +1 more source

Differential extraction of antigens of Anaplasma marginale

American Journal of Veterinary Research, 1988
SUMMARY Strain-, group-, and genus-specific antigens of the Florida isolate of Anaplasma marginale had different solubilities in zwitterionic, nonionic, and anionic detergents. On the basis of their solubility in nonionic detergent, antigens were grouped into 3 classes: (i) a 108-kilodalton (kD) group-specific antigen and a series of poorly defined ...
J H, Adams, R D, Smith
openaire   +2 more sources