Resistance to BHC in the cattle tick Boophillus microplus (Can.) in India

1964 ◽  
Vol 55 (3) ◽  
pp. 405-410 ◽  
Author(s):  
R. P. Chaudhuri ◽  
R. C. Naithani
Keyword(s):  
First Record ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Indian Veterinary Research Institute ◽  
Veterinary Research ◽  
Wettable Powder ◽  
The Mean ◽  
The Difference ◽  
The Village ◽  
Village Population

Cattle kept at the Latoli kraal of the Indian Veterinary Research Institute at Mukteswar in the Kumaon foothills of the Himalayas were heavily infested with the tick Boophilus microplus (Can.). In order to reduce the infestation, the animals were treated with BHC dusts every season for a number of years. In 1960, it was noticed that the treatment was not as effective as in the previous years. A series of concentration/response tests was therefore carried out in 1961–62 to see whether or not the tick had developed any resistance to BHC. Ticks collected from cattle in a village about five miles distant, where no acaricide had ever been applied, were used as the standard for comparison. BHC as a wettable powder was used to provide six different concentrations of γ BHC for engorged females and unfed larvae, respectively. Treatment was by appropriate dipping techniques. Analysis of the results showed that the population of B. microplus infesting cattle at the Latoli kraal had developed resistance to BHC. The LC50's of γ BHC for engorged females and unfed larvae, respectively, of the Latoli population were 0.5164 and 0.0182 per cent., and of the village population 0.0834 and 0.00069 per cent. This seems to be the first record of any species of tick developing resistance to an acaricide in India.It was found that the mean number of eggs laid per tick in the control batches was higher in the village population than in the Latoli population and that the difference was highly significant.

Host resistance to cattle tick (Boophilus microplus) in Brahman (Bos indicus) cattle. I. Responses of previously unexposed cattle to four infestations with 20,000 larvae

1975 ◽  
Vol 26 (6) ◽  
pp. 1073 ◽  
Author(s):  
BM Wagland
Keyword(s):  
Host Resistance ◽  
Bos Indicus ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Brahman Cattle ◽  
The Mean

Four purebred Brahman and four beef Shorthorn cattle which had not previously been exposed to Boophilus microplus were infested four times with 20,000 B. microplus larvae. On first infestation, the yield of engorged female ticks on all animals was about 25% of the larvae applied. Aftcr three further infestations, the mean yield of engorged females on the Brahmans decreased to 7.5% whereas there was no decrease in the yield of ticks on the Shorthorns. On the Brahman cattle. development of larvae to engorged females took 1–2 days longer and the engorged females weighed less. However, there was no difference in the reproductive index of female ticks engorged on either Brahmans or Shorthorns. Increases in rectal temperatures occurred in all cattle 15–17 days after the first infestation and in some cattle on days 6–7 as well as on days 15–17 after reinfestation. It was concluded that resistance to B. microplus is an acquired phenomenon in Brahman cattle.

Resistance to the cattle tick, Boophilus microplus in a herd of Australian Illawarra Shorthorn cattle: Its assessment and heritability

1970 ◽  
Vol 21 (1) ◽  
pp. 163 ◽  
Author(s):  
RH Wharton ◽  
KBW Utech ◽  
HG Turner
Keyword(s):  
Reference Value ◽  
Mature Female ◽  
Boophilus Microplus ◽  
Supplementary Information ◽  
Cattle Tick ◽  
The Mean ◽  
Tick Counts ◽  
The Right ◽  
High Level ◽  
Tick Resistance

An Australian Illawarra Shorthorn herd of 24 cows was mated in three consecutive years with an AIS bull. The cows and their progeny were rated for tick resistance at frequent intervals from August 1959 to December 1965 by counting the numbers of semiengorged female ticks on the right side. The mean of log counts for all counts on a particular animal was adopted as the reference value for its degree of susceptibility. The ranking of cattle generally showed a high level of consistency with mean repeatability of counts (r = 0.47, P < 0.01). Discrimination between animals was more reliable (P < 0.01) in summer (r = 0.52) than in winter (r = 0.27). The repeatability of tick counts increased with mean count, from r = 0.27 when the mean count was 3 to r = 0.67 when it was 100. The reliability of counts on the cows decreased with age and with lactation. Supplementary information on a larger herd showed no effect of pregnancy on mean count or on discrimination between susceptible and resistant animals, but showed that there was a partial breakdown of resistance during lactation. In calves infested naturally, no effects of age or sex on tick counts or their repeatability were detected, though male calves yielded significantly larger numbers of ticks than females when infested artificially. The mean yield of mature female ticks on the cows following two artificial infestations with known numbers of larvae ranged from 0.2 to 27.4% of the potential. Natural and artificial assessments of susceptibility were closely correlated. The rank of the bull was similar to that of the more resistant cows. Mean estimates of the heritability of tick resistance based on single counts were 39 % from dam-calf correlations and 49 % from full-sib correlations. Estimates based on summer counts only were 42 and 64% respectively. These results provide strong encouragement for selecting for tick resistance.

The rate of loss of DDT on cattle in relation to protection from reinfestation by the cattle tick Boophilus microplus

1972 ◽  
Vol 23 (5) ◽  
pp. 735 ◽  
Author(s):  
HJ Schnitzerling ◽  
WJ Roulston ◽  
BF Stone ◽  
JT Wilson ◽  
PG Thompson
Keyword(s):  
Laboratory Tests ◽  
Boophilus Microplus ◽  
The Other ◽  
Cattle Tick ◽  
Cyclic Change ◽  
Minimum Period ◽  
The Mean

Australian Illawarra Shorthorn cattle were sprayed with 0.5% w/v DDT on 31 consecutive occasions at intervals of 4 weeks. Spraying was rotated amongst three groups of cattle. The rate of loss of DDT was determined on the barrel for all occasions and concurrently on the flank and escutcheon for the last 16 occasions. A protective period, defined as the minimum period cattle were protected against reinfestation by the cattle tick, was determined concurrently from observations made on the flank and escutcheon. A cyclic change in the rate of loss of DDT occurred on all sites. The rate was highest in summer and lowest in winter, and was in antiphase with corresponding changes in the protective period. The magnitude of the change of rate of loss of DDT was greater on the flank than on either the barrel or the escutcheon. The rate of loss from the three sites was always in the sequence flank > escutcheon > barrel. The mean deposits of DDT present on the flank and escutcheon when protection had just ceased were respectively 0.29 mg/g hair and 0.054 mg/sq. in., and the protective periods did not differ significantly. The protective period on the barrel was not measured, but it was calculated from data on the DDT deposits to be longer than on either of the other sites, even allowing for the fact that laboratory tests showed that DDT on barrel hair was relatively less effective against larvae than similar weights of DDT on flank hair.

Survival of cattle ticks in central Queensland pastures

1959 ◽  
Vol 10 (1) ◽  
pp. 129 ◽  
Author(s):  
PR Wilkinson ◽  
JT Wilson
Keyword(s):  
Laboratory Data ◽  
Free Water ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Hatching Date ◽  
Female Progeny ◽  
Large Numbers ◽  
Cattle Ticks ◽  
The Difference ◽  
The Times

Observations on the gradual distension and shrinkage of cattle tick larvae (Boophilus microplus (Canestrini)) confirmed that they can take up water from, or lose water to, the atmosphere under suitable conditions. Further evidence was obtained that partially desiccated larvae can drink when in contact with free water. Consideration of the relative humidities recorded over sward adjoining a creek, during a drought, suggested that larvae would be able to absorb moisture during the 9-hr period before dawn. Dew m-as also available to the larvae in drought time, and on most mornings when observations were made. In the laboratory, larvae in cultures supplied with water droplets lived longer than those in similar cultures not supplied with water. Larval clusters on artificial supports out of doors lived longer if protected by fabric shades. At intervals over 2 years, female ticks were placed in grassland near Rockhampton and at Yeppoon, Qld., under simulated natural conditions. The times of hatching and periods of survival of the larvae were observed. In contrast with the marked decrease in tick fertility which occurs in the winter in south Queensland, ticks put out throughout the winter at Rockhampton laid large numbers of fertile eggs. Very few larval progeny of ticks put out in summer survived 3 months after the date of placement of the parent female. Progeny of ticks put out in the winter persisted up to 54 months after the date of placement of the parent. A graph of the 'pre-hatch' (pre-oviposition plus developmental) periods against screen temperatures followed the trend expected from laboratory data, but the difference between actual and computed hatching dates was large in some cases. Actual hatching date was usually later than computed hatching date, both for ticks in the soil and for ticks in humidified containers in a meteorological screen. The comparatively short survival periods of larvae in the central Queensland summer indicated the practicability of controlling the cattle tick by temporarily destocking pastures.

Demographic characteristics and their genetic implications in a small island

1988 ◽  
Vol 20 (2) ◽  
pp. 225-234 ◽  
Author(s):  
Motofumi Masaki ◽  
Akira Koizumi
Keyword(s):  
Genetic Drift ◽  
Demographic Characteristics ◽  
Small Island ◽  
Birth Cohorts ◽  
Effective Population ◽  
The Family ◽  
The Mean ◽  
The Village ◽  
Small Effective Population Size ◽  
Village Population

SummaryThe family registration records from a village population in a small island of Japan are used to assess the effect of demographic differentiation within a population on genetic measures. When the couples studied are classified by birth cohorts and origins, wives of the couples where one spouse came from elsewhere were older at marriage and had a shorter duration of marriage or registration than wives where both spouses were natives of the village. The mean number of offspring is statistically smaller in the former except for the latest cohort, due mainly to out-migration during the reproductive ages which also resulted in low rates of marriage among the offspring within the village. This leads to a small effective population size and an increased likelihood of genetic drift in the overall population.

scholarly journals EFEKTIFITAS INFUSA DAUN KEMANGI TERHADAP PENURUNAN TEKANAN DARAH WANITA PENDERITA HIPERTENSI STADIUM SATU

2015 ◽  
Vol 1 (01) ◽  
Author(s):  
Nurhayati Siagian ◽  
Aloysia Marta Elysabeth ◽  
Untung Sudharmono
Keyword(s):  
Blood Pressure ◽  
Alternative Therapy ◽  
Adult Women ◽  
Average Value ◽  
Consecutive Sampling ◽  
Lower Blood ◽  
Before And After ◽  
The Mean ◽  
The Difference ◽  
The Village

ABSTRAK Pendahuluan: Daun kemangi (Ocimum Basilicum) merupakan tanaman obat di Indonesia yang sering digunakan sebagai obat tradisional. Daun kemangi mengandung senyawa aktif flavonoid dan magnesium yang dapat menurunkan tekanan darah. Tujuan: Penelitian ini bertujuan untuk mengetahui perbedaan rerata tekanan darah sebelum dan sesudah pemberian infusa daun kemangi pada wanita penderita Hipertensi stadium satu di desa Karyawangi Kabupaten Bandung Barat. Metode: Metode yang digunakan adalah pra eksperimen dengan one group pretest-posttest design. Subjek yang digunakan adalah wanita dewasa berusia 35-60 tahun penderita hipertensi stadium satu dengan nilai tekanan darah 140/90-159/99 mmHg. Sampel 20 orang wanita dewasa penderita hipertensi stadium satu yang dipilih secara consecutive sampling. Intervensi dilakukan selama 6 hari. Uji statistik yang digunakan adalah uji hipotesa dengan uji-t dua pihak. Hasil: Terdapat perbedaan rerata tekanan darah yang signifikan sebelum dan sesudah dilakukan intervensi 149,5/93,9 mmHg dan nilai rata-rata sesudah intervensi yaitu sebesar 136,6/86,6 mmHg. Selisih tekanan darah sistolik sebesar 12,9 mmHg dan tekanan darah diastolik sebesar 7,3 mmHg. Diskusi:. Ada pengaruh infusa daun kemangi terhadap tekanan darah. Infusa daun kemangi dapat digunakan sebagai terapi alternatif pengobatan tekanan darah tinggi.   Kata kunci: hipertensi stadium satu, infusa daun kemangi, tekanan darah     ABSTRACT Introduction: Basil leaves (Ocinum Basilicum) is a medicinal plant in Indonesia, which is often used as a traditional medicine. Basil leaves containing active compound flavonoids and magnesium which can lower blood pressure. Objective: This study aimed to determine the differences between the mean blood pressure before and after the infusion of basil leaves in women with hypertension Sadium one in Karyawangi the village of West Bandung regency.Methods: The method used was pre experiment with one group pretest-posttest design. The subjects used were adult women aged 35-60 years with a one-stage hypertensive blood pressure values ​​of 140 / 90-159 / 99 mmHg. A sample of 20 adult women with hypertension stage one chosen by consecutive sampling. Interventions performed for 6 days. The statistical test used was hypothesis testing using t-test two parties. Results: The average value of blood pressure before intervention in the amount of 149.5 / 93.9 mmHg and the average value after intervention in the amount of 136.6 / 86.6 mmHg. The difference in systolic blood pressure was 12.9 mmHg and diastolic blood pressure by 7.3 mmHg. Discussion: There was an effect of basil infuse on blood pressure. Infuse basil leaves can be used as an alternative therapy to treat high blood pressure. Keywords: stage one hypertension, basil leaves infused, blood pressure Full printable version: PDF

scholarly journals Survey of cattle tick infestation on farm herds in Ogun state, Nigeria

2021 ◽  
Vol 44 (3) ◽  
pp. 23-30
Author(s):  
F. A. Akande ◽  
I. K. Oyewusi ◽  
M. G. Ajisafe ◽  
O. A. Idowu ◽  
I. O Anifowose
Keyword(s):  
Tick Control ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Disease Vector ◽  
Ogun State ◽  
Boophilus Decoloratus ◽  
Tick Distribution ◽  
The Mean ◽  
The Tropics ◽  
On Farm

Cattle in the tropics are exposed to varying levels of challenges r from endo and ectoparasites as well as environmental stressors. Ticks have been recognized as the most notorious threat to cattle because of their hide damaging and disease vector. As a result of these, continuous study of tick distribution on cattle is necessary. Two hundred and five cattle of determined breed, sex and age, were randomly sampled from eight different locations across four local Government areas of Ogun state in 2015. Harvested ticks were identified to species level. Variation in tick distribution across age, sex and locations were subjected to statistical analysis. Among the 205 cattle sampled, 125 (61%) had ticks while 80 (39%) had no ticks, 84 (67%) female have ticks, 27 (33%) do not have, 41 (44%) males have ticks and 53 (56%) do not have. The mean age of the cattle sampled was 3.0±0.1 years, with a mean Packed Cell Volume (PCV) of 30.8±0.4%. Amblyommavariegatum was the most prevalent tick (76%), followed by Rhipicephalus (Boophilus) decoloratus (20%), Rhipicephalus (Boophilus) microplus (2%) while Rhipicephalus (Boophilus) annulatus. and Hyalommam arginatum were 1% respectively. Age and sex of cattle were discovered to be statistically significant in this study. Considering the economic importance of ticks in regards to morbidity and mortality; appropriate tick control strategy and technique need to be applied and constant tick surveillance should be encouraged in the study area

Heritability estimates from correlations in intra-sire data. Appendix I. from - Resistance to the cattle tick, Boophilus microplus in a herd of Australian Illawarra Shorthorn cattle: Its assessment and heritability

1970 ◽  
Vol 21 (1) ◽  
pp. 181
Author(s):  
HG Turner
Keyword(s):  
Reference Value ◽  
Mature Female ◽  
Boophilus Microplus ◽  
Supplementary Information ◽  
Cattle Tick ◽  
The Mean ◽  
Tick Counts ◽  
The Right ◽  
High Level ◽  
Tick Resistance

An Australian Illawarra Shorthorn herd of 24 cows was mated in three consecutive years with an AIS bull. The cows and their progeny were rated for tick resistance at frequent intervals from August 1959 to December 1965 by counting the numbers of semiengorged female ticks on the right side. The mean of log counts for all counts on a particular animal was adopted as the reference value for its degree of susceptibility. The ranking of cattle generally showed a high level of consistency with mean repeatability of counts (r = 0.47, P < 0.01). Discrimination between animals was more reliable (P < 0.01) in summer (r = 0.52) than in winter (r = 0.27). The repeatability of tick counts increased with mean count, from r = 0.27 when the mean count was 3 to r = 0.67 when it was 100. The reliability of counts on the cows decreased with age and with lactation. Supplementary information on a larger herd showed no effect of pregnancy on mean count or on discrimination between susceptible and resistant animals, but showed that there was a partial breakdown of resistance during lactation. In calves infested naturally, no effects of age or sex on tick counts or their repeatability were detected, though male calves yielded significantly larger numbers of ticks than females when infested artificially. The mean yield of mature female ticks on the cows following two artificial infestations with known numbers of larvae ranged from 0.2 to 27.4% of the potential. Natural and artificial assessments of susceptibility were closely correlated. The rank of the bull was similar to that of the more resistant cows. Mean estimates of the heritability of tick resistance based on single counts were 39 % from dam-calf correlations and 49 % from full-sib correlations. Estimates based on summer counts only were 42 and 64% respectively. These results provide strong encouragement for selecting for tick resistance.

Chemical control of the cattle tick Boophilus microplus (Can.)

1965 ◽  
Vol 55 (4) ◽  
pp. 617-635 ◽  
Author(s):  
W. J. Roulston ◽  
J. T. Wilson
Keyword(s):  
Organophosphorus Compounds ◽  
Boophilus Microplus ◽  
Reproductive Capacity ◽  
Cattle Tick ◽  
Clear Cut ◽  
Large Numbers ◽  
Hair Samples ◽  
Biological Tests ◽  
The Mean ◽  
High Level

The effectiveness of ten acaricides against Boophilus microplus (Can.) on cattle in southern Queensland, Australia, was investigated in 1960–63. Of infested cattle dipped in or sprayed with each acaricide, some were kept in stalls so that observations on ticks that survived treatment could be made, and others were grazed in tick-infested pastures in order to find the period of protection against reinvasion by larvae. Untreated cattle were also kept in the stalls to indicate the numbers of ticks occurring in the absence of treatment. The reproductive capacity, in terms of eggs and larvae produced, of ticks surviving treatment was compared with that of untreated ticks, and, for aldrin, dieldrin and the last four compounds mentioned below, the protective period in the field was compared with deposits of acaricide on the hair of the cattle as indicated by chemical and biological tests. For the last four acaricides, the effect on toxicity of artificially fouling the dip fluid was investigated, and also the relative toxicity of clean and artificially fouled fluids to ticks dipped in them under laboratory conditions.The acaricides tested, and (in brackets) the concentrations used, were aldrin (0·05 & 0·1%), dieldrin (0·1%), carbaryl (0·2%), Boots' ED 12308 (0·2%), ethion (0·1%), Ciodrin (0·1%), coumaphos (0·02%), diazinon (0·05%), carbophenothion (0·086%) and dioxathion (0·075%). All were emulsion formulations except carbaryl and diazinon, which were used in wettable-powder form.Daily collections of engorged adult ticks that fell from the stalled cattle provided clear-cut, though not quantitative, assessments of the effects of the acaricides. All the compounds tested gave a very high level of control, the only exception being the lower concentration of aldrin, and the reproductive capacity of ticks that survived treatment was negligible. With some of the acaricides, large numbers of surviving ticks fell in the first day or two after treatment, and some laid eggs; but the viability of the latter was invariably low. These observations emphasise the need to consider the reproductive capacity as well as the direct kill of parasitic ticks when assessing the value of acaricides. At the concentrations tested, nearly all the compounds allowed a few ticks to survive that were in the engorged-nymph stage at the time of treatment; these dropped off the cattle from the tenth day onwards and laid viable eggs.The mean protective periods of the chlorinated hydrocarbons and organophosphorus compounds ranged from three to six days, but on individual animals periods from three to eight days were recorded. Amongst the carbamates, a mean protective period of seven days was recorded for carbaryl in summer, whereas the mean protective period of RD12308 in winter, when such periods are longer, was 12 days. In come cases, protection appeared to continue when deposits of the original acaricide could no longer be detected on hair samples, and reasons for this are discussed.The influence of various factors, other than concentration, on the effectiveness of acaricidal fluids and on the results of tests was examined. Chemical and biological tests of hair samples showed that the acaricides persisted longer on stalled than on pastured cattle. Formulations affected the amount of toxicant deposited on the hair, and there was an indication that fouling of the dip fluid with soil and dung may, under certain circumstances, increase the amount of toxicant deposited.

Long-term population studies on the cattle tick (Boophilus microplus) on untreated cattle selected for different levels of tick resistance

1979 ◽  
Vol 30 (2) ◽  
pp. 353 ◽  
Author(s):  
RW Sutherst ◽  
RH Wharton ◽  
IM Cook ◽  
ID Sutherland ◽  
AS Bourne
Keyword(s):  
Census Data ◽  
Seasonal Pattern ◽  
Boophilus Microplus ◽  
Cattle Tick ◽  
Tick Population ◽  
Population Sizes ◽  
The Mean ◽  
Highly Correlated ◽  
Tick Counts ◽  
Tick Resistance

Census data were collected at weekly intervals on tick populations on untreated cattle over a period of 6 years in central Queensland, near Rockhampton. Hereford x Shorthorn (British; HS) heifers and two herds of Africander (Zebu) x [Hereford and Shorthorn] (AX) heifers, one with animals of high resistance (AXH) and the other of medium (AXM) tick resistance, were grazed in separate paddocks. A herd of AX steers was added to the trial when the heifers commenced calving in 1972–73. Data were collected from the heifers for three years prior to their first calving and then for a further three years whilst they were breeding. There were large differences between the numbers of ticks in different years and a consistent seasonal pattern, the numbers being lowest from July to September and highest in the April to June quarter. The AXH herd had fewest ticks for most of the experiment, but after the first year there was little difference between the infestations on the AXM and HS herds. The resistance of all herds, measured by artificial infestations with larvae, increased during the first 3 years but declined after the cattle began breeding, and fluctuated from year to year. The resistance of some heifers did not stabilize until the animals were more than a year old, and that of some animals drifted up or down over long periods. The loss of resistance of a small proportion of the cattle in the AXH herd was responsible for the advantage of that herd being substantially reduced. Both the ranking for resistance of animals and the mean resistance of the herds, assessed with artificial infestations, agreed with the rankings and tick population sizes observed from tick counts on the cattle in the field. Changes in the mean resistance of the herds in spring in different years were highly correlated with concurrent field infestations, which suggests that changes in host resistance have important effects on tick populations. Tick counts on the calves up to weaning showed no correlation with concurrent counts on their dams, but the ranking of the counts on the calves was consistent over the 6 month period.

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