(n.) Any young insect from the time that it hatches from the egg until it becomes a pupa, or chrysalis. During this time it usually molts several times, and may change its form or color each time. The larvae of many insects are much like the adults in form and habits, but have no trace of wings, the rudimentary wings appearing only in the pupa stage. In other groups of insects the larvae are totally unlike the parents in structure and habits, and are called caterpillars, grubs, maggots, etc.
(n.) The early, immature form of any animal when more or less of a metamorphosis takes place, before the assumption of the mature shape.
Example Sentences:
(1) Larvae from fresh water eggs, cultured in fresh water and 'normal' laboratory cultures reached 50% infectivity in 3-5 days, losing potential infectivity in 11-15 days post-hatching.
(2) After treatment of larvae of instar 1 at preimago stages about 77% of the insects died.
(3) A total of 3,532 females of various engorged weights was collected from all calves, resulting in a mean female tick yield of 1.78% based on the number of larvae used for all infestations.
(4) Similar concentrations of free ecdysteroids were recorded in adults and larvae, although the two life cycle stages differed in their ratio of ecdysone: 20-hydroxyecdysone.
(5) Larvae of both mutants also excrete 3H-3-hydroxykynurenine and 3H-kynurenine rapidly, which probably accounts for the normal levels of kynurenine during larval life.
(6) Guinea pigs exposed to 200 and 400 H. truncatum larvae elicited the greatest change in feeding efficiency during the fourth infestation.
(7) In cultures of medium ML-15 containing a feeder layer of Dog Sarcoma (DS) cells larvae successfully moulted and showed a small but significant increase in length.
(8) The test is based on the ability of larvae to freely migrate through selected mesh sizes of nylon sieves and the reduced ability of larvae to migrate after preincubation with, and in the presence of, substances that inhibit or reduce larval motility.
(9) This study provides evidence for a maternal yolk factor associated with increased tolerance and resistance of larvae to copper.
(10) Human activity not only increases risk, but influences control by killing mosquito larvae, killing adult mosquitos or preventing mosquitos from feeding.
(11) Infected ticks were reared from larvae feeding on each of 11 rabbits taken from the same site.
(12) Histopathology examination from the margin of the ulcerative area confirmed the diagnosis of basal cell carcinoma, which was infested secondarily with larvae of flies.
(13) Tolypocladium tundrense and T. terricola UV-irradiated conidia exhibited acute toxicity to Aedes aegypti larvae in concentrations of 5 x 10(5) and 5 x 10(6) ml-1, respectively.
(14) These products, as well as several synthetic intermediates, were evaluated for antifilarial activity against Molinema dessetae either in vivo in its natural host, the rodent Proechimys oris, or in vitro by a new test using cultures of the infective larvae.
(15) However, mosquitoes infected with more than 4 larvae became more active than uninfected mosquitoes 8 days after infection.
(16) Metabolism of carbaryl by the fat body is affected by the age of the larva, the pH of the incubation medium, and the concentration of magnesium chloride in the incubation medium.
(17) The mutant larvae are apparently normal, but they harbor serious defects in the organs containing proliferating cells of both somatic and germ line origins.
(18) Changes in haemolymph juvenile hormone (JH) concentrations of larvae of the southwestern corn borer, Diatraea grandiosella, were used to estimate the activity of the corpora allata.
(19) Statistical analysis has shown the following: a) the growth inhibition, which is especially distinct in autumn-spring generation, takes place in the Ist instar larvae 1.76-2.20 mm long inhabiting the walls of the nasal cavity and concha (their average body length at hatching is 1.08 plus or minus 0.004 mm); the inhibition is associated with interpopulation relations and apparently does not depend on the date of its beginning and can last from 6 to 7 months; c) after the growth resumption the development continues uninterruptedly up to the moulting; the inhibition is also possible at the beginning of the 2nd instar and then the development proceeds without any intervals up to the complete maturation of larvae.
(20) It is present throughout development and is as abundant in embryos as in larvae and adult flies.
Measle
Definition:
(n.) A leper.
(n.) A tapeworm larva. See 2d Measles, 4.
Example Sentences:
(1) By 1978, the reduction in incidence of measles will exceed 90%.
(2) In an effort to identify the optimal dose and strain of measles vaccination for early immunization, Peruvian infants were randomly assigned to receive one of three measles vaccines in varying doses at 5 to 6 or 8 to 9 months of age.
(3) Five potential N-linked glycosylation sites are present in the measles H protein sequence.
(4) From our data, more than 1 X 10(6) antibody molecules must bind to each cell infected with measles virus before complement dependent lysis can occur in a homologous test system.
(5) The results showed that measles virus produced three size classes of plus-sense N-containing RNA species corresponding to monocistronic N RNA, bicistronic NP RNA, and antigenomes.
(6) The relatively high HI titres observed, particularly in adults, imply that antigenic restimulation of antibody against measles occurs and thus that coverage by immunization remains inadequate.
(7) Foremost among the predisposing factors were measles (25%), empyema thoraxis (17%), and unconsciousness (13%).
(8) A resurgence of measles, a highly infectious viral infection, has occurred in the United States.
(9) Unvaccinated children had a mortality hazard ratio of 3.0 compared with vaccinated children (P = .002), indicating a protective efficacy against death of 66% (CI 32%-83%) of measles vaccination.
(10) While measles virus caused extensive damage to nervous tissue, the SSPE strains, in general, exerted a less deleterious effect.
(11) Measles and rubella antibody titres in patients with and without HLA-Dw2 and HLA-B7 antigens were compared using a sensitive radioimmunoassay method.
(12) The reduced anti-M antibody in sera from patients with SSPE was demonstrated whether immune precipitation was performed with wild-type measles virus or SSPE virus proteins.
(13) Ninety per cent of children who had pre-vaccination measles antibodies showed a two-fold or more rise in HI antibodies.
(14) The antibody response to the measles component was marginally better in the older group, but no differences were observed in the response to the mumps and rubella components.
(15) It is suggested that malnourished children in the community or the very young can be safely and effectively vaccinated against measles.
(16) Age at measles contraction was obtained and analyzed for 44 SSPE patients identified in Karachi between 1983 and 1988.
(17) From these libraries, a measles virus specific sequence corresponding to 885 of 1600 nucleotides of the measles virus phosphoprotein gene has been cloned.
(18) Homogeneous IgG bands were separated by preparative agarose electrophoresis and were found to represent measles virus-specific antibodies.
(19) Cross-sectional surveys of the measles immunisation status of resident 6-23-month-old infants were conducted immediately before, immediately after, and approximately 2 months after the campaign in order to determine the effectiveness of a mass campaign in boosting coverage in an area with a high influx rate.
(20) Biopsies from controls did not show evidence of measles virus.