Alterations in Host Metabolism by the Specific and Anorectic Effects of the Cattle Tick (Boophilus Microplus) III. Metabolic Implication of Blood Volume Body Water and Carcass Composition Changes

1971 ◽  
Vol 24 (4) ◽  
pp. 1033 ◽  
Author(s):  
PH Springell ◽  
JC O'kelly ◽  
RM Seebeck
Keyword(s):  
Specific Effect ◽  
Carcass Composition ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Red Cell ◽  
Anorectic Effect ◽  
Quality Diet ◽  
Host Metabolism ◽  
Composition Changes ◽  
Cell Volumes

Plasma and red cell volumes were determined and the amounts of circulating metabolites deduced following heavy B. microplus infestation of Hereford steers fed a high quality diet. The experiment was designed to separate out effects of the cattle tick on host metabolism caused by reduced food intake ("anorectic effect"), and by other factors ("specific effect"). The specific effect caused a depression of the red cell volume and of the amounts of circulating haemoglobin, albumin, and total cholesterol and increases in the amount of circulating globulin. Anorectic effects were not significant.

scholarly journals Alterations in Host Metabolism by the Specific and Anorectic Effects of the Cattle Tick (Boophilus Microplus) I. Food Intake and Body Weight Growth

1971 ◽  
Vol 24 (2) ◽  
pp. 373 ◽  
Author(s):  
RM Seebeck ◽  
PH Springell ◽  
JC O'kelly
Keyword(s):  
Food Intake ◽  
Tick Infestation ◽  
Specific Effect ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Weight Growth ◽  
Hereford Cattle ◽  
Anorectic Effect ◽  
Quality Diet ◽  
Host Metabolism

This experiment was designed to measure the effects of infestation by B. microplus on cattle and to separate the effects of reduced food intake ("anorectic effect") from those due to the remaining factors of tick infestation ("specific effect"). Hereford cattle kept on a high-quality diet were studied over a treatment period of 11 weeks with the tick-infested animals being infested regularly with equal larval doses for each animal.

scholarly journals Alterations in Host Metabolism by the Specific and Anorectic Effects of the Cattle Tick (Boophilus Microplus) II. Changes in Blood Composition

1971 ◽  
Vol 24 (2) ◽  
pp. 381 ◽  
Author(s):  
JC O'kelly ◽  
RM Seebeck ◽  
PH Springell
Keyword(s):  
Feed Intake ◽  
Tick Infestation ◽  
Specific Effect ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Blood Composition ◽  
High Quality ◽  
Anorectic Effect ◽  
Quality Diet ◽  
Host Metabolism

Changes in the blood composition of Hereford steers kept on a high. quality diet and infested with B. microplus were studied. The experiment was designed so that the effects on blood composition due to reduced feed intake ("anorectic effect") and those due to the remaining factors of tick infestation ("specific effect") could be independently estimated.

Ecto- and endoparasitic effects on the growth rates of Zebu crossbred and British cattle in the field

1971 ◽  
Vol 22 (5) ◽  
pp. 839 ◽  
Author(s):  
GW Seifert
Keyword(s):  
Cell Volume ◽  
Haemoglobin Concentration ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Red Cell ◽  
Significant Treatment ◽  
Protein Levels ◽  
Internal Parasite ◽  
Internal Parasites ◽  
Breed Differences

The effect of natural infestations of internal parasites (Cooperia species, Haemonchuspbcei, Oesophagostomum radiatum, and Trichostrongylus axei) and the cattle tick Boophilus microplus on the growth rate from weaning to 21 months of age of 93 F3 Africander x Hereford and Shorthorn (AX), Brahman x Hereford and Shorthorn (BX), and Hereford x Shorthorn (British) was studied. All animals were weighed, ticks counted, faeces sampled, and the animals treated at fortnightly intervals. Faecal egg counts were used as an index of internal parasite burdens, and tick infestations assessed according to the number of females between 0.45 and 0.8 cm in length on one complete side of the animal. Breed differences for the internal parasitic burdens were small and were only significant (P<. 0.05) for O. radiatum. The BX cattle carried the highest burdens. The BX cattle were significantly more resistant to tick infestations than the AX group, which in turn were significantly more resistant than the British group. Males carried significantly more ticks than females. Parasites had little or no effect on gains while the animals were gaining weight rapidly, and it was only after a cessation of gains due to deteriorating pasture conditions that significant treatment effects became evident. Treatment had the largest effect on the British and very little effect on the BX group. Regressions of gains on parasitic burdens within treatments were all negative. The repeatabilities of a series of egg counts for the species were significant, Haemonchus egg counts having the highest repeatabilities. Correlations between egg counts of Cooperia spp and 0. radiatum, and H. placei and T. axei were significant (r = 0.82, P < 0.001; and r = 0.23, P < 0.05). Internal parasites significantly depressed packed red cell volume, haemoglobin concentration, and plasma protein levels. There were significant negative correlations of egg counts of O. radiatum with haemoglobin concentration and packed cell volume of the Zebu crossbreds (r = 0.46 and v = 0.47, P < 0.01).

scholarly journals Determinants of Erythrocyte Size in Chronic Liver Disease

Blood ◽  
1969 ◽  
Vol 34 (6) ◽  
pp. 739-746 ◽  
Author(s):  
THOMAS M. KILBRIDGE ◽  
PAUL HELLER
Keyword(s):  
Bone Marrow ◽  
Liver Disease ◽  
Chronic Liver Disease ◽  
Peripheral Blood ◽  
Hepatic Cirrhosis ◽  
Alcoholic Cirrhosis ◽  
Clinical Findings ◽  
Red Cells ◽  
Red Cell ◽  
Cell Volumes

Abstract Serial determinations of red cell volumes were made with an electronic sizing device in 30 patients with hepatic cirrhosis. Variations in red cell volumes were correlated with other hematologic and clinical findings. The results of these studies suggest that volume macrocytosis in patients with alcoholic cirrhosis is either due to megaloblastosis of the bone marrow or to an accelerated influx of young red cells into the peripheral blood.

scholarly journals Proteomics Approach to the Study of Cattle Tick Adaptation to White Tailed Deer

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Marina Popara ◽  
Margarita Villar ◽  
Lourdes Mateos-Hernández ◽  
Isabel G. Fernández de Mera ◽  
José de la Fuente
Keyword(s):  
Animal Health ◽  
Boophilus Microplus ◽  
Host Factors ◽  
Cattle Tick ◽  
Host Proteins ◽  
Tick Feeding ◽  
Blood Digestion ◽  
Cattle Ticks ◽  
Proteomics Approach ◽  
Single Host

Cattle ticks,Rhipicephalus (Boophilus) microplus, are a serious threat to animal health and production. Some ticks feed on a single host species while others such asR. microplusinfest multiple hosts. White tailed deer (WTD) play a role in the maintenance and expansion of cattle tick populations. However, cattle ticks fed on WTD show lower weight and reproductive performance when compared to ticks fed on cattle, suggesting the existence of host factors that affect tick feeding and reproduction. To elucidate these factors, a proteomics approach was used to characterize tick and host proteins inR. microplusticks fed on cattle and WTD. The results showed thatR. microplusticks fed on cattle have overrepresented tick proteins involved in blood digestion and reproduction when compared to ticks fed on WTD, while host proteins were differentially represented in ticks fed on cattle or WTD. Although a direct connection cannot be made between differentially represented tick and host proteins, these results suggested that differentially represented host proteins together with other host factors could be associated with higherR. microplustick feeding and reproduction observed in ticks fed on cattle.

Domestic dogs as hosts of the cattle tick, Boophilus microplus

1964 ◽  
Vol 15 (5) ◽  
pp. 854 ◽  
Author(s):  
HMD Hoyte
Keyword(s):  
Adult Female ◽  
Egg Production ◽  
Boophilus Microplus ◽  
Domestic Dogs ◽  
Cattle Tick

Larval B. microplus were placed on 36 domestic dogs, about half of which were adults and half were puppies. Ticks matured on the adults only. The yield of adult female ticks was very low and variable (average for all dogs, 0.01%); more time was needed to mature than on cattle, and size and egg production were reduced. Most of the resulting larvae matured successfully when placed on cattle. No ticks matured on the small number of young foxes and dingoes which were tested. It is suggested that the unconsidered presence of dogs represents some risk to the success of campaigns to eradicate this tick.

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