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Infestation

About: Infestation is a research topic. Over the lifetime, 8308 publications have been published within this topic receiving 82305 citations.


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Journal ArticleDOI
TL;DR: It is demonstrated that most drugs used in the control of R. B. microplus in the state present low efficacy, as measured by in vitro tests, probably derived from the genetic resistance developed by the parasites due to the indiscriminated and inadequate use of these acaricides in the field.
Abstract: Infestation by ticks is responsible for significant economic losses to the cattle industry in several regions, including Rio Grande do Sul (RS) state. Losses may be derived from animal stress, weight loss and skin damage, as well as from costs with treatment. The indiscriminated use of pesticides against these parasites has resulted in high levels of genetic resistance to several drugs, representing a problem for disease control. Thus, the objective of this research was to evaluate the susceptibility of field specimens of Rhipcephalus (Boophilus) microplus to the acaricides used in the control of the parasite. Female ticks obtained from 42 farms in different counties of RS were submitted to the engorgeted female immersion test, to estimate the resistance of the parasite to the drugs. Amitraz in combination with chlorpyriphos was the most efficient drug, acting effectively in ticks from 100% of the tested farms (11/11). Associations of cypermethrin-chlorpyriphos-citronelol were efficient in ticks from 61% of the farms (25/41) and cypermethrin-ethion in 37% (10/27). Cypermethrin alone was efficient in 20,7% (6/29) and Amitraz. one of the most used products, was efficient in ticks from only 14,2% (6/42) of the farms. These results demonstrate that most drugs used in the control of R. B. microplus in the state present low efficacy, as measured by in vitro tests. The low drug efficacy is probably derived from the genetic resistance developed by the parasites due to the indiscriminated and inadequate use of these acaricides in the field.

39 citations

Journal ArticleDOI
TL;DR: Dog-specific characteristics such as length of coat and body size played significant roles in tick infestation and the characteristics of tick prophylaxis of dogs in the Berlin/Brandenburg area.

39 citations

Journal ArticleDOI
TL;DR: The incidence and severity of the pest infestation were higher in hotter and drier agroecological zones than in cooler and wetter zones, and there were direct negative relationships between altitude and L. invasa infestation on Eucalyptus species.
Abstract: Very little is known about Leptocybe invasa Fisher & LaSalle, a new fast-spreading alien pest infesting Eucalyptus in several countries. This study examined L. invasa infestation on Eucalyptus germplasms in different agroecological zones of Uganda. The incidence and severity of the pest infestation were higher in hotter and drier agroecological zones than in cooler and wetter zones. There were direct negative relationships between altitude and L. invasa infestation on Eucalyptus species. No infestation was observed on any Eucalyptus species in stands at altitudes ranging from 1938 to 2452 (the maximum encountered) m above sea level. Leptocybe invasa infestation occurred on all Eucalyptus species encountered (Eucalyptus grandis, Eucalyptus camaldulensis, Eucalyptus saligna, Eucalyptus robusta), except Eucalyptus maidenii that escaped attack because it was located outside the ecological range of the insect. The incidence and severity of L. invasa infestation was generally higher on clonal hybrids E. grandis · E. camaldulensis than on E. grandis · Eucalyptus urophylla. Research on host germplasms, L. invasa biology and ecology, impact of the pest infestation and possible control strategies are suggested to facilitate the development of sustainable management strategies.

39 citations

Journal ArticleDOI
TL;DR: HrCLM is a common parasitic skin disease in children, is associated with behavioural and environmental risk factors, and shows marked seasonality in its prevalence in an endemic area of north–eastern Brazil.
Abstract: The epidemiology of hookworm-related cutaneous larva migrans (HrCLM) in endemic communities is not well understood. To describe the prevalence of HrCLM and to identify environmental and behavioural risk factors for the infestation, two cross-sectional surveys were conducted in a small village in an endemic area of north–eastern Brazil — one in the rainy season and the other in the dry season. The members of each household were examined clinically for the presence of HrCLM, and information on possible risk factors was collected. HrCLM, which was diagnosed in 45 individuals in the rainy-season survey and in 17 in the dry-season survey, was significantly more prevalent in the rainy season (4.4% v. 1.7%; P<0.001). The age-specific prevalences peaked, at 14.9%, in infants and children aged ≤ 4 years.In a logistic regression analysis, the independent risk factors for current infestation or infestation in the preceding 6 months were identified as young age (odds ratio = 0.96; 95% confidence interval = 0....

39 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023602
20221,428
2021276
2020344
2019294