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Browsing by UP Author "Neitz, Albert Walter Herman"
Now showing items 1-20 of 28
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Malan, Melissa; Serem, June Cheptoo; Bester, Megan Jean; Neitz, Albert Walter Herman; Gaspar, Anabella Regina Marques (Wiley, 2016-01)Antimicrobial peptides (AMPs) are small, cationic peptides that possess a large spectrum of bioactivities, including antimicrobial, anti-inflammatory and antioxidant activities. Several AMPs are known to inhibit ...
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Neitz, Albert Walter Herman; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)The isolation, characterization and kinetic properties of a toxic and non-toxic anti-protease from the eggs of A. hebraeum are compared with similar data obtained for eggs of other tick species. The biochemistry of various ...
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Neitz, Albert Walter Herman; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)The functional significance of some components of salivary glands and of their secretion and of haemolymph of Amblyomma hebraeum and other tick species is reviewed with respect to host responses at the attachment site, the ...
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Neitz, Albert Walter Herman; Viljoen, G.J.; Van Wyngaardt, S.; Gothe, R.; Visser, L.; Bezuidenhout, J. Dürr; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)One-day-old leghorn chickens were used in a laboratory assay to determine the toxicity of crude extracts of the tick Argas (Persicargas) walkerae and of fractions obtained during the isolation procedure. Extracts of unfed ...
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Neitz, Albert Walter Herman; Viljoen, G.J.; Bezuidenhout, J. Dürr; Oberem, P.T.; Vermeulen, N.M.J.; Van Wyngaardt, Wouter; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)A sensitive and reliable enzyme-linked immunosorbent assay for the detection of antibodies to Cowdria ruminantium in serum and C. ruminantium antigen in Amblyomma hebraeum nymphae is described. For the screening of antibodies, ...
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Neitz, Albert Walter Herman; Viljoen, G.J.; Oberem, P.T.; Visser, L.; Vermeulen, N.M.J.; Bezuidenhout, J. Dürr; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)An enzyme-linked immunosorbent assay was used to detect Cowdria ruminantium antibodies during the course of heartwater disease. IgM antibodies reached a maximum on the 4th day after infection and disappeared on the 7th ...
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Louw, Elizabeth M.; Van der Merwe, Nicolaas Albertus (Albie); Neitz, Albert Walter Herman; Maritz-Olivier, Christine (Elsevier, 2013-01)One of the principle mechanisms utilised by ticks to obtain a blood meal is the subversion of the host’s haemostatic response. This is achieved through the secretion of saliva containing anti-haemostatic proteins into ...
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Barnard, Annette-Christi; Nijhof, Ard M.; Gaspar, Anabella Regina Marques; Neitz, Albert Walter Herman; Jongejan, Frans; Maritz-Olivier, Christine (Elsevier, 2012-05)Tick proteins functioning in vital physiological processes such as blood meal uptake, digestion and reproduction are potential targets for anti-tick vaccines, since vaccination could inhibit these essential functions and ...
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Neitz, Albert Walter Herman; Rossouw, Mirinda; De Waal, D.T.; Du Plessis, J.L.; Van Gas, Letitia; Brett, Susan; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)Immunoblotting of Cowdria ruminantium proteins with sheep or bovine antiserum identified 2 antigenically conserved proteins, one being an immunodominant 31 kDa and the other a minor 27 kDa protein. These proteins are present ...
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Neitz, Albert Walter Herman; Gothe, R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1985)By leaving open in tum the genital orifice, coxal apertures and anus , the present study has shown that engorged female Argas walkerae release at least 1 volatile pheromone mainly, or maybe exclusively, from the genital ...
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Taute, Helena; Bester, Megan Jean; Neitz, Albert Walter Herman; Gaspar, Anabella Regina Marques (Elsevier, 2015-09)Os and Os-C are two novel antimicrobial peptides, derived from a tick defensin, which have been shown to have a larger range of antimicrobial activity than the parent peptide, OsDef2. The aim of this study was to determine ...
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Neitz, Albert Walter Herman; Gothe, R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1985)It was shown in this study that Rhipicephalus evertsi evertsi males emit pheromones in the preparasitic as well as in the parasitic phases. Conspecific unengorged male and female images exhibited a high response to ...
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Neitz, Albert Walter Herman; Vermeulen, N.M.J.; Gothe, R.; Senekal, A.C.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)Major differences were observed in hexane, ethanol and butanol extracts of eggs obtained from Rhipicephillus evertsi evertsi females in which the porose areas functioned normally (AP⁺ eggs) and from R. evertsi evertsi in ...
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Neitz, Albert Walter Herman; Gothe, R.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1984)During investigations into the volatility of female pheromones of A. walkerae in a Y -shaped olfactometer, engorged conspecific male ticks responded weakly both to female-contacted filter paper discs and to intact females ...
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Prozesky, Leon; Verschoor, J.A. (Jan Adrianus), 1953-; Neitz, Albert Walter Herman; Viljoen, Gerrit Johannes; Vermeulen, N.M.J.; Oberem, P.T.; Bezuidenhout, J. Dürr; Putterill, John Fraser; Visser, L.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1985)The isolation of Cowdria ruminantium by means of wheat germ lectin affinity chromatography as described in this paper permits the recovery of partially purified viable organisms under mild conditions in short time. These ...
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Neitz, Albert Walter Herman; Verschoor, J.A. (Jan Adrianus), 1953-; Viljoen, G.J.; Bezuidenhout, J. Dürr; Oberem, P.T.; Putterill, John Fraser; Visser, L.; Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)The isolation of Cowdria ruminantium by means of Percoll density gradient centrifugation permits the recovery of partially purified viable populations of the organism possessing distinctly different densities. These ...
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Ibrahim, Mohammed Auwal; Serem, June Cheptoo; Bester, Megan Jean; Neitz, Albert Walter Herman; Gaspar, Anabella Regina Marques (Elsevier, 2019-02)Antidiabetic agents with multiple targets have the greatest pharmaceutical potential. In this study, three α-glucosidase inhibitory peptides, PFP, YPL and YPG, were investigated for additional antidiabetic targets viz.; ...
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Ibrahim, Mohammed Auwal; Serem, June Cheptoo; Bester, Megan Jean; Neitz, Albert Walter Herman; Gaspar, Anabella Regina Marques (Springer, 2020-12)Type 2 diabetes mellitus (T2DM) is a multifactorial disease that requires multiple therapeutic strategies for its management. Bioactive peptides with multiple anti-diabetic targets are attractive therapeutic molecules. The ...
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Neitz, Albert Walter Herman; Viljoen, G.J.; Bezuidenhout, J. Dürr; Oberem, P.T.; Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1988)Investigation into the presence of C. ruminantium antigen, using an enzyme-linked immunosorbent assay (ELISA) in various tick tissues and haemolymph of adult Amblyomma hebraeum ticks revealed that the organism invades a ...
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Stopforth, Elaine; Neitz, Albert Walter Herman; Gaspar, Anabella Regina Marques (Springer, 2010-08)A proteomics approach was employed to identify proteins secreted into the hemolymph of Ornithodorus savignyi ticks 2 h after immune-challenge with the yeast, Candida albicans. Profiling of the proteins present in hemolymph ...
Now showing items 1-20 of 28