| field tests of sterile screwworm flies. cochliomyia hominivorax (diptera: calliphoridae), against natural populations in three coastal areas of mexico. | | 1979 | 522119 |
| attraction and ovipositional response of screwworms, cochliomyia hominivorax (diptera: calliphoridae), to stimulated bovine wounds. | | 1979 | 537009 |
| the reproductive physiology of the screwworm, cochliomyia hominivorax (diptera: calliphoridae). i. oogenesis. | | 1979 | 544817 |
| the reproductive physiology of the screwworm, cochliomyia hominivorax (diptera: calliphoridae). ii. effect of constant temperatures on oogenesis. | | 1979 | 544818 |
| the reproductive physiology of the screwworm, cochliomyia hominivorax (diptera: calliphoridae). iii. mating. | | 1979 | 544819 |
| the screwworm cochliomyia hominivorax (diptera: calliphoridae) reinfests the island of curaçao, netherlands antilles. | | 1978 | 633301 |
| control of insects by sexual sterilization. | the control of insect populations by restricting their birth rate offers several advantages over methods based on increasing the death rate. the sterile-male technique scored practical success in the control of the screwworm, cochliomyia hominivorax (coquerel), but more general applications of the sterility procedure may be expected in conjunction with the development of integrated procedures for pest insect management. | 1975 | 1091482 |
| longevity, oviposition, and fertility of several strains of the screwworm, cochliomyia hominivorax (diptera: calliphoridae). | | 1975 | 1223298 |
| [program fo the eradication of cochliomyia hominivorax in northern africa]. | the new world screwworm (nws, cochliomyia hominivorax) is an obligate parasite of warm-blooded animals. the female lays up to 300 eggs in any break in the skin, and the resulting larvae (screwworms) burrow into surrounding living flesh. infested animals frequently die, while the annual cost of controlling the pest in domestic animals is about us $10 per head. nws is endemic in tropical latin america. in 1988, it was detected in libya, presumable introduced with imported sheep. by 1990, the infes ... | 1992 | 1301621 |
| epidemiology of sheep myiases in são paulo state, brazil. | a survey of diptera species causing cutaneous myiases on sheep in botucatu, são paulo, brazil was made to determine seasonal incidence, predilection sites and the factors predisposing to infestation. sheep were checked daily for myiases for one year. at two week intervals larvae from wounds were collected for identification. only larvae of dermatobia hominis and cochliomyia hominivorax were found. myiases due to c. hominivorax were observed during the whole year with high incidence from january ... | 1992 | 1306916 |
| monitoring adult populations of the screwworm (diptera: calliphoridae) with feeding stations baited with liver. | populations of the screwworm, cochliomyia hominivorax (coquerel), were monitored by capturing adults with hand nets and rooted liver set on the ground. adults were marked and released. during the 61-d study conducted in a tropical dry forest in the dry season (january to march 1989), 2,640 individual females and 460 individual males were recorded at the four liver-baited stations. the total number of visits by females was 5,769 and by males 510. the mean number of unmarked adults per day was 44. ... | 1992 | 1401481 |
| calf milk replacers as substitutes for milk in the larval diet of the screwworm (diptera: calliphoridae). | the effect of calf milk replacers as substitutes for nonfat dry milk in the larval diet of the screwworm, cochliomyia hominivorax (coquerel), was determined in the laboratory. pupal weight and fecundity of females were significantly greater than the control with some of the formulations tested. larval crawl-off patterns for all diets were similar. pupal weights were significantly affected only on day 1 of the 4-d crawl-off period. among the formulations of calf milk replacer, gold label brand pr ... | 1992 | 1401483 |
| kinetic development and decline of antiscrewworm (diptera: calliphoridae) antibodies in serum of infested sheep. | sheep infested with screwworms, cochliomyia hominivorax (coquerel), produced specific serum antibodies detectable by elisa. significant antibody levels were found beginning at 1 wk after infestation and persisting for 2 mo, with peak levels at 3 wk after infestation. mean response values and corresponding larval survivorship were similar over a range of 25 to 200 larvae per individual sheep. anomalous seropositive responses in some noninfested sheep suggested the possibility of cross-reactivity ... | 1992 | 1404268 |
| myiasis: the battle continues against screwworm infestation. | the new world screwworm fly (cochliomyia hominivorax) caused myiasis extensively among livestock in mexico and the southern third of the usa until eradication was achieved by repeatedly releasing sterile males of the species on a massive scale. the pest appeared in libya in 1988, the first time it had become established outside the western hemisphere. because of the threat of myiasis in animals and people, not only in libya but also elsewhere in africa and beyond, a concerted campaign of sterile ... | 1992 | 1418323 |
| responses of female new world screwworm flies, cochliomyia hominivorax, to coloured targets in the laboratory. | the responses of unmated female new world screwworm flies, cochliomyia hominivorax coquerel, to visual targets were studied in a wind-tunnel. both activity and frequency of contacts with targets increased greatly when the screwworm attractant mixture swormlure-4 was added to the airstream. target-orientated responses depended on target colour, with red and black targets being preferred over blue, white and yellow ones; this preference was much greater in the presence of odour than in its absence ... | 1992 | 1421478 |
| responses of female new world screwworm flies, cochliomyia hominivorax, to swormlure-4 in the laboratory. | the behaviour of 4-day-old virgin female new world screwworm flies cochliomyia hominivorax coquerel was investigated in a wind tunnel using video. addition of the screwworm attractant swormlure-4 to the airstream resulted in an increase in the number of take-offs and in the duration of flight. in the presence of swormlure-4 the flight speed decreased and the rate of turning increased. take-off was significantly orientated upwind during the period when swormlure-4 was added to the airstream, and ... | 1992 | 1421495 |
| phoretic and parasitic mites infesting the new world screwworm fly, cochliomyia hominivorax, following sterile insect releases in libya. | during the screwworm eradication programme in libya in 1991, trapped specimens of cochliomyia hominivorax (coquerel) were found infested with phoretic mites, macrocheles muscaedomesticae (scopoli), or parasitic mites, trichotromidium muscarum (riley). the possible sources of infestation and potential effects of mites on screwworm flies are discussed. | 1992 | 1421506 |
| human infestation with cochliomyia hominivorax, the new world screwworm. | | 1992 | 1430370 |
| observations on the new world screwworm fly in libya and the risk of its entrance into egypt. | data on traumatic myiasis caused by cochliomyia hominivorax in libya were reported from august 1988 until february 1989. a total of 468 cases of screwworm myiasis were recorded in seven species of livestock and 229 humans, mainly children, were also found to be infested. cattle and sheep were the most common hosts in livestock. in cattle, the principal infestation site was the umbilicus of neonates; in sheep, it was mainly the fatty tail. animal myiasis reached its peak in october and november, ... | 1992 | 1496790 |
| ophthalmomyiasis: a review with special reference to cochliomyia hominivorax. | ophthalmomyiasis, infestation of the eye by dipterous fly larvae, may result in sequelae ranging from minor irritation to blindness, disfigurement, and death. infestation with cochliomyia hominivorax, a medically significant and economically important species, exemplifies the mechanisms by which larvae can cause tissue damage. although clinical history may be suggestive of ophthalmomyiasis, the definitive diagnosis requires direct observation of larvae. treatment of ophthalmomyiasis involves rem ... | 1992 | 1554829 |
| wound myiasis caused by cochliomyia hominivorax. | | 1992 | 1571457 |
| persistence of sterile screwworm (diptera: calliphoridae) flies at a release site. | studies to determine the persistence of released, sterile screwworms, cochliomyia hominivorax (coquerel), were conducted in belize, central america, in 1987-1988. a total of nine releases were made, each consisting of 4,000 females marked with a fluorescent dust. previous similar studies with baited fly traps indicated that flies died or dispersed from the release site within 3-4 d. for this study, flies were recaptured at sentinel animals. recapture rates varied greatly between releases, a resu ... | 1992 | 1593015 |
| gel extenders in larval diet of cochliomyia hominivorax (diptera: calliphoridae). | larvae of the screwworm, cochliomyia hominivorax (coquerel), were reared on meridic diets containing ground corncob material (grit) in test 1 and the cob grit or sawdust in test 2 to reduce or replace the amount of an expensive synthetic copolymer gelling agent. biological parameters for the tests included pupal yield (total number), pupal weight (size), pupal malformation, adult emergence, adult malformation, egg weight, and egg hatch to assess for any significant differences. in the first test ... | 1992 | 1593016 |
| the new world screwworm fly in libya: a review of its introduction and eradication. | the new world screwworm fly, cochliomyia hominivorax (coquerel) (diptera: calliphoridae), became established in the old world for the first time during 1988, in the socialist people's libyan arab jamahiriya. an obligate parasite of mammals in its larval stages, causing wound myiasis, it is one of the most serious insect pests of livestock in the americas. to avert a major disaster for the livestock industry and wildlife of africa and southern europe, the libyan government and the food and agricu ... | 1992 | 1600222 |
| polytene chromosomes of the old world screwworm fly (chrysomya bezziana) and its evolutionary relationships with lucilia cuprina and cochliomyia hominivorax (diptera: calliphoridae). | standard polytene chromosome maps for the old world screwsworm fly, chrysomya bezziana, are presented. good quality polytene chromosomes obtainable from pupal trichogen cells allow detailed analysis of autosomal euchromatin. the sex chromosomes are represented by irregular heterochromatic structures resembling those described previously in trichogen polytene chromosomes of the australian sheep blowfly, lucilia cuprina. a high degree of homology with the banding pattern of l. cuprina polytene chr ... | 1992 | 1618389 |
| influence of attractants on behavior of screwworms (diptera: calliphoridae) in a tropical wet forest in costa rica. | in a mark-release-recapture study, sheep wounds and rotted liver were used as attractants to study movements of the screwworm fly, cochliomyia hominivorax (coquerel), in a costa rican tropical wet forest in the wet season. when sites were monitored for less than 1 h, liver attracted between 3 and 12.2 times more flies of both sexes than did wounds, but proportionately fewer gravid and parous females. only 24.6% of females marked at liver sites were recaptured; seldom (3.1%) did they visit sheep ... | 1991 | 1744296 |
| alternative to sentinel animals for collecting egg masses from wild females of the screwworm (diptera: calliphoridae). | egg masses from wild populations of the screwworm, cochliomyia hominivorax (coquerel), were obtained by collecting females from rotted liver, holding them for 3 d until egg maturation and then placing them on heated ground beef for oviposition. nearly 50% of the females oviposited. fertility of egg masses was 66 and 95% at the two collection sites. decreased fertility was associated with collections of virgin females. average weight +/- sd of the egg masses was 13.7 +/- 1.40 mg; the number of eg ... | 1991 | 1744297 |
| reproductive compatibility and mitochondrial dna restriction site analysis of new world screwworm, cochliomyia hominivorax, from north africa and central america. | the reproductive compatibility of new world screwworms, cochliomyia hominivorax (coquerel), from north africa and a strain being mass produced for the mexican eradication programme was examined to assess the feasibility of using flies from the mexican screwworm mass production facility for a sterile insect technique eradication programme in north africa. males from the production strain mated randomly with females from north africa and from the production strain when both were present. neither s ... | 1991 | 1768908 |
| cutaneous myiasis. recent advances in biology, immunology and improvements of the control measures. | the evolution of the main topics of study related to the biology, the life-cycle and the distribution of insects causing cutaneous myiasis during the last century is presented. these subjects are still of interest and a synopsis of new data concerning hypoderma tarandi, h. diana and prezhevalskiana silenus is reported as well as the changes of distribution of some species such as cochliomyia hominivorax. in the second part, an over view of what has been archived on myiasis immunology is reviewed ... | 1991 | 1805677 |
| field comparisons of attractants for the screwworm fly (diptera: calliphoridae) in a tropical dry forest in costa rica. | field trials were conducted to determine the best attractant for adults of the screwworm, cochliomyia hominivorax (coquerel), in costa rica. the five attractants were wounded sentinel sheep, decayed fruit, rotted beef liver, rotted fish, and medium used to rear larvae of this blow fly. significantly more adults came to rotted liver than any other attractant. no adults were captured in traps baited with rotted fruit. significantly more males came to beef liver than were captured at other baits; m ... | 1991 | 1842793 |
| gelled diet for screwworm (diptera: calliphoridae) mass production. | a rearing system based on a diet gelled with water-lock g-400, a synthetic superabsorbent (poly(2-propenamide-co-2-propenoic acid, sodium salt)) (wl), was compared with the standard rearing system (liquid diet suspended in acetate fibers) for the mass production of screwworms, cochliomyia hominivorax (coquerel). the wl rearing system yielded 2% heavier pupae, 32% higher egg to pupa survival, and required 54% less diet and 88% less labor than the standard rearing system. other advantages of the w ... | 1991 | 1885847 |
| the new world screw-worm fly in north africa. | the course of the north african outbreak of new world screw-worm myiasis (cochliomyia hominivorax) since its discovery in 1988 is described. chemical and biological control measures are reviewed, including the current progress of the 'sterile male' (sit) eradication programme. | 1991 | 1888213 |
| myiasis in a wounded soldier returning from panama. | an imported case of traumatic myiasis occurred in a soldier wounded during military action in panama in december 1989 and evacuated to brooke army medical center, fort sam houston, texas. at the medical center, five larvae were removed from the scalp wound, reared to the adult stage, and identified as cochliomyia hominivorax (coquerel). though this was the only reported case of wound myiasis of the 254 servicemen evacuated for medical treatment, this incident indicates a potential mechanism for ... | 1991 | 1941919 |
| studies on the screwworm fly cochliomyia hominivorax in libya: effect of temperature on pupation and eclosion. | the american screwworm fly cochliomyia hominivorax has recently been reported in libya (el-azazy 1989). fly larvae were cultured on blood agar at different temperatures (-5 degrees, 5 degrees, 18 degrees, 20 degrees, 30 degrees, 37 degrees, or 40 degrees c). larvae pupated at 18 degrees, 20 degrees, 30 degrees, or 37 degrees c, and the highest pupation (100%) occurred at 20 degrees c. adult flies emerged from pupae that were maintained at 18 degrees, 20 degrees, 30 degrees, or 37 degrees c; the ... | 1991 | 1994371 |
| oviposition by screwworm flies (diptera: calliphoridae) on contact with host fluids. | factor affecting oviposition by screwworm flies, cochliomyia hominivorax (coquerel), contacting different host fluids were examined in a laboratory bioassay. fresh bovine blood, which does not release the attractive odors involved in host finding, nevertheless stimulated as many or more females to oviposit than did the other fluids tested. these other fluids included attractive fluid from screwworm-infected wounds (a favored oviposition site in nature) and cultures of providencia rettgeri (a bac ... | 1991 | 2019681 |
| chorionic structure of the egg of the screwworm, cochliomyia hominivorax (diptera: calliphoridae). | the chorion of the cochliomyia hominivorax (coquerel) egg is described using observations from scanning and transmission electron microscopy and light microscopy. included are the gross structure and surface characteristics of the chorion, the basic architecture and internal components of the chorion proper, the location and function of the hatch lines, and the functional morphology of the plastron region as a respiratory structure. in the regular hexagonal arrangement and form of individual str ... | 1991 | 2033606 |
| age distribution of adult female screwworms (diptera: calliphoridae) captured on sentinel animals in the coastal lowlands of guatemala. | the age structure of screwworm, cochliomyia hominivorax (coquerel), populations was studied in the guatemalan lowlands with the pteridine technique of age determination. flies (95% were 4-15 d old) were captured on sentinel animals. mean age was 7.5 d. the oldest fly captured was 21 d old. most flies visiting wounds were reproductively mature females. of these, about one-half oviposited once, one-third oviposited twice, and 1 in 10 completed three ovarian cycles (assuming a 3-d interval between ... | 1990 | 2212236 |
| [importation of animal and human tropical myiasis by cochliomyia hominivorax (coquerel) in libya (diptera: calliphoridae)]. | | 1990 | 2237016 |
| a detector dog for screwworms (diptera: calliphoridae). | a male german wirehaired pointer, canis familiaris l., was trained to search for and locate screwworm, cochliomyia hominivorax (coquerel); pupae; and animals infested with screwworms. the command, "find it" led to the detection of a screwworm-infested animal and the command "search" led to the detection of screwworm pupae. after approximately 5 mo of training, the dog could detect screwworm-infested animals. after 3 mo more of training, the dog could detect screwworm pupae. through 7 august 1989 ... | 1990 | 2258514 |
| wound myiasis caused by cochliomyia hominivorax in humans in libya. | | 1990 | 2278090 |
| classification of screwworms (diptera: calliphoridae) by larval spine morphology. | the morphology of screwworm, cochliomyia hominivorax (coquerel), larval spines was affected by larval substrate and geographic effects on variation. spine morphology of individual larvae was used to determine criteria for discrimination analysis classification. classification criteria for types of wounds and host species were determined for larvae from central and southern mexico. larvae from marginal populations (united states, caribbean islands, costa rica) were classified by these criteria. c ... | 1990 | 2332873 |
| the influence of seasonal temperatures on the natural regulation of the screwworm, cochliomyia hominivorax, in the southern u.s.a. | the incidence of screwworm cases in texas during the 1962-82 sterile-male eradication campaign is analysed in relation to seasonal temperatures and screwworm density. the analysis shows that screwworm outbreaks occur in response to favourable seasonal conditions, especially warm winters and cool summers. the outbreaks collapse following cold winters and hot summers. screwworm density in autumn also influences rates of increase, possibly through a shortage of wounded hosts in the autumn-winter pe ... | 1989 | 2519660 |
| the potential geographical distribution of the old world screw-worm fly, chrysomya bezziana. | the potential geographical distribution and relative abundance of the old world screw-worm fly, chrysomya bezziana villeneuve (diptera: calliphoridae) as determined by climate, was assessed using climex, a computer program for matching climates. climex describes the relative growth and persistence of animal populations in relation to climate. the observed global distribution of c.bezziana was compared with the potential distribution predicted by climex. the differences in the two distributions i ... | 1989 | 2519672 |
| genetics of screwworm: new genetic markers and preliminary linkage map. | eight new genetic markers for cochliomyia hominivorax (diptera: calliphoridae), the screwworm, are characterized. the markers include three eye mutants, lemon-eye (le), cherry-eye (ch), and red-eye (re); one wing mutant, curly-wing (cw); and four allozyme markers, amylase (amy-1), glycerol-3-phosphate dehydrogenase (gpd), phosphoglucomutase (pgm), and octanol dehydrogenase (odh). the markers are associated into four linkage groups. radiation-induced translocations were used to correlate the link ... | 1989 | 2614059 |
| first human infestations in africa with larvae of american screw-worm, cochliomyia hominivorax coq. | | 1989 | 2619369 |
| intraspecific genetic variability in mitochondrial dna of the screwworm fly (cochliomyia hominivorax). | mitochondrial dna variability has been analyzed in the primary screwworm fly (cochliomyia hominivorax) using restriction endonuclease fragment patterns and restriction site mapping. a total of 30 different screwworm lines originating from texas to costa rica and the island of jamaica was examined using 15 restriction endonucleases. eleven of the restriction enzymes revealed polymorphism and yielded 16 mitochondrial genotypes or haplotypes. two of the haplotypes were widely distributed, haplotype ... | 1989 | 2619711 |
| age determination in the adult screwworm (diptera: calliphoridae) by pteridine levels. | fluorescence spectrophotometry was used to assess the possible use of pteridines in the compound eyes to estimate the age of adult screwworms, cochliomyia hominivorax (coquerel). factors affecting the quantities of pteridines include temperature and head size. no difference in pteridine levels was found among flies fed protein or carbohydrate. a regression model for estimating the age of female screwworms was constructed. the model uses head capsule size and relative pteridine quantities and ass ... | 1989 | 2768643 |
| a case of canine otitis due to screwworm, cochliomyia hominivorax, in france. | | 1989 | 2773209 |
| the screwworm fly in libya: a threat to the livestock industry of the old world. | the screwworm fly, cochliomyia hominivorax (coquerel), is the most serious insect pest of cattle in the new world. it has recently been recorded in libya, where it appears to have become established. this article documents these recent finds, and provides background information on the recognition of the fly, its biology, distribution and importance. | 1989 | 2815502 |
| mitochondrial dna variation among geographical populations of the screwworm fly, cochliomyia hominivorax. | | 1988 | 2895185 |
| wound myiasis caused by cochliomyia hominivorax in libya. | | 1989 | 2929078 |
| climatological correlates of screwworm (cochliomyia hominivorax) abundance in texas, u.s.a. | the causes of screwworm (cochliomyia hominivorax) outbreaks in north america are not well understood, but the literature suggests that climate was historically important. screwworm case incidence in each of seven climatological divisions of texas was examined for the years 1962-83, the period when sterile-male releases were made. weak but statistically significant correlations were found between winter and summer cases and mean winter and summer rainfall and temperature when the independent vari ... | 1987 | 2979523 |
| the larvae of some blowflies of medical and veterinary importance. | diagnostic features are described as a series of couplets that enable separation of the third instar larvae of the following pairs of closely related forms of blowflies of medical and veterinary importance: chrysomya chloropyga (wiedemann) and ch.putoria (wiedemann), chrysomya albiceps (wiedemann) and ch.rufifacies (macquart), cochliomyia hominivorax (coquerel) and co.macellaria (fabricius), lucilia sericata (mergen) and l. cuprina (wiedemann), calliphora augur (fabricius) and c. stygia (fabrici ... | 1987 | 2979525 |
| effect of trap placement on detection of cochliomyia hominivorax (diptera: calliphoridae). | | 1988 | 3351081 |
| isolation and identification of two antibacterial agents produced by a strain of proteus mirabilis isolated from larvae of the screwworm (cochliomyia hominivorax) (diptera: calliphoridae). | | 1986 | 3517334 |
| comparison of gelled and meat diets for rearing screwworm, cochliomyia hominivorax (diptera: calliphoridae), larvae. | | 1987 | 3584637 |
| incidence of the screwworm, cochliomyia hominivorax, and the secondary screwworm, c. macellaria (diptera: calliphoridae), in the central highlands of chiapas, mexico. | | 1986 | 3950930 |
| the screwworm, cochliomyia hominivorax (diptera: calliphoridae), in central america and proposed plans for its eradication south to the darien gap in panama. | | 1985 | 4045931 |
| replicating dna molecules from fertilized eggs of cochliomyia hominivorax (diptera). | | 1974 | 4214683 |
| hormones for the control of livestock arthropods. effects of 2 juvenile hormone analogues against the screwworm cochliomyia hominivorax (coquerel), in vitro and in infested bovine hosts. | | 1974 | 4422944 |
| [rare myiasis complicatin caused by cochliomyia hominivorax in a case of hemorrhoidectomy]. | | 1969 | 5346991 |
| [prymary myiasis in buffaloes--bufalos bubais l., 1758--of the state of são paulo, brazil, by cochliomyia hominivorax (coquerel, 1858), diptera calliphoridae]. | | 1970 | 5527072 |
| [carbon dioxide anesthesia of untreated and chemosterilant-treated screw-worm flies, cochliomyia hominivorax (coquerel) (diptera: calliphoridae)]. | | 1967 | 5623781 |
| longevity of screw-worm flies, cochliomyia hominivorax (coquerel) (diptera: calliphoridae): effect of sex and grouping. | | 1967 | 5623789 |
| chemosterilization of screw-worm flies, cochliomyia hominivorax (coquerel) (diptera: calliphoridae): influence of age at treatment and mating, effect on survival, and transfer of chemosterilant by contamination. | | 1968 | 5699963 |
| cytology of oögenesis in chemosterilized screw-worm flies, cochliomyia hominivorax, as related to endomitosis in nurse cells. | | 1968 | 5758057 |
| a cytological study of radiation effects in testes of the screw-worm fly, cochliomyia hominivorax (diptera: calliphoridae). | | 1967 | 6044889 |
| antibacterial activity demonstrated by culture filtrates of proteus mirabilis isolated from screwworm (cochliomyia hominivorax) (diptera: calliphoridae) larvae. | | 1984 | 6374147 |
| relationships of larval rearing variables to fly attraction and oviposition responses in the screwworm, cochliomyia hominivorax (diptera: calliphoridae). | | 1984 | 6748011 |
| autocidal control of screwworms in north america. | the larva of the blowfly cochliomyia hominivorax, also known as the screwworm, eats the living flesh of cattle and sheep and other warm-blooded animals. a program to eradicate the screwworm in the united states was initiated in the 1950's. the program was very effective until 1968, but severe screwworm outbreaks occurred in 1972 to 1976 and in 1978. although the program has again been effective since 1979, the possibility of outbreaks recurring in the future has highlighted the need for a broade ... | 1982 | 7199204 |
| efficacy of doramectin in the protection of neonatal calves and post-parturient cows against field strikes of cochliomyia hominivorax. | two studies were conducted in latin america, one in venezuela and one in argentina, using a common protocol to investigate the efficacy of a single s.c. injection of doramectin in the prevention and control of field infestations of cochliomyia hominivorax in newborn calves and post-parturient cows. in both experiments, pregnant cows were paired on the basis of their calving time. the first cow that calved was assigned to a medicated group, and both cow and calf were treated with doramectin. the ... | 1995 | 7676595 |
| [myiases of economic importance]. | a simplified list of the principal diptera capable of causing myiasis is followed by a brief presentation of the biology, lesions inflicted, and methods of treatment and control of the myiases of economic importance. cochliomyiasis caused by cochliomyia hominivorax is of greatest interest, in view of the damage and losses caused by this disease. a brief account of the outbreak of infestation in libya illustrates the danger of this parasite. other important traumatic myiases are described: that d ... | 1994 | 7711305 |
| cochliomyia hominivorax (coquerel, 1858) and phaenicia sericata (meigen, 1826) parasiting domestic animals in buenos aires and vicinities (diptera, calliphoridae). | | 1994 | 7885240 |
| identification of electrophysiologically-active compounds for new world screwworm, cochliomyia hominivorax, in larval wound fluid. | acidic and non-acidic fractions from extracts of fluid from sheep wounds infested with larvae of cochliomyia hominivorax (coquerel) were analysed by linked gas chromatography and electroantennography in order to detect electrophysiologically-active compounds that could be potential attractants. responses to twenty-six electrophysiologically-active compounds were observed and, on the basis of electron impact and chemical ionization mass spectrometry and co-chromatography with authentic compounds, ... | 1994 | 8025323 |
| prophylactic and persistent efficacy of doramectin against cochliomyia hominivorax in cattle. | two prophylactic studies and one persistent efficacy study were conducted in brazil to evaluate one injection of doramectin at a dose rate of 200 micrograms kg-1 against induced infestations of the new world screwworm, cochliomyia hominivorax. in each prophylactic study, 12 calves were allocated to two groups of six animals. six calves were treated with doramectin and six with saline. two hours after treatment, animals were anesthetized and received two incisions, one in the shoulder and one in ... | 1993 | 8236744 |
| prevention of cutaneous myiasis caused by screw worm larvae (cochliomyia hominivorax) using ivermectin. | during march of 1991 and 1992, four trials were carried out in the central area of argentina to evaluate the efficacy of ivermectin in the prevention of myiasis caused by cochliomya hominivorax larvae. in the first trial 24 steers were artificially wounded, in the second and third trial, 36 and 20 bull calves were castrated while in the fourth trial, 30 newborn calves were used. on day 0, half of the animals of each trial was treated with ivermectin (200 micrograms/kg) and the rest remained as u ... | 1993 | 8237199 |
| influence of habitat, season, and attractant on adult behavior of the screwworm (diptera: calliphoridae) in a tropical dry zone in costa rica. | influence of attractant, season, habitat, temperature, and physiological state of the screwworm, cochliomyia hominivorax (coquerel), on daily activity and oviposition were examined during a 122 d study in a tropical dry forest in costa rica. flies were marked and released. numbers of flies visiting baits increased during the wet season and decreased during the dry season; 3 times more flies were observed at baits during the wet season than were observed during the dry season. an average of 33 fe ... | 1993 | 8254134 |
| dermal myiasis in an australian traveller. | myiasis, the infestation of body tissues by the larvae of flies, occurs infrequently in australian tourists who return from areas where certain species are endemic. some of these insect species such as cochliomyia hominivorax and chrysoma bezziana (new and old world screw-worms respectively) are responsible for significant disease in livestock as well as in humans. we report a patient who travelled extensively through south america and returned to australia with a subcutaneous nodule containing ... | 1993 | 8311826 |
| nosocomial myiasis by cochliomyia hominivorax in honduras. | | 1993 | 8337729 |
| scanning electron microscopy of the larval instars of cochliomyia hominivorax. | descriptions are given of the morphological features of laboratory-reared first to third larval stages of cochliomyia hominivorax. the pseudocephalon, spines and papillae of the segments, and the anterior and posterior spiracles of all three larval stages were studied by scanning electron microscope microscope. | 1993 | 8369561 |
| attracting adult new world screwworm, cochliomyia hominivorax, to odour-baited targets in the field. | a field study in libya investigated aspects of cochliomyia hominivorax behaviour relevant to the operation of a target-based control system. flies were readily caught by electrified targets, but only when baited with the attractant 'swormlure-4'. target size (0.25-1 m2) did not affect catch, but black targets caught twice as many flies as red ones. omitting the most volatile component of swormlure-4, dimethyl disulphide, significantly reduced catches of both sexes of c.hominivorax in wind-orient ... | 1993 | 8435490 |
| breeding structure of screwworm fly populations (diptera: calliphoridae) in colima, mexico. | starch gel electrophoresis was used to resolve gene frequencies among populations of screwworm, cochliomyia hominivorax (coquerel). the loci examined coded for alpha-glycerophosphate dehydrogenase, octanol dehydrogenase, and phosphoglucomutase. flies were sampled by traps widely distributed in colima province, southwestern mexico. gene frequencies at odh differed significantly among the 11 populations. alleles segregating at pgm and alpha-gpdh were homogeneous among populations. there were signi ... | 1993 | 8459427 |
| mean life expectancy of old world screwworm fly, chrysomya bezziana, inferred from the reproductive age-structure of native females caught on swormlure-baited sticky traps. | the reproductive status of native (wild) screwworm fly, chrysomya bezziana, caught on swormlure-baited sticky traps in papua new guinea is described. a total of 1122 females and 25 males were trapped. of these females 595 were scored for insemination status and stage of ovarian development (on a scale of 2-10) of which 20% were in suitable condition for assignment to first, second and third ovarian cycles. of the nulliparous females, only 17% were inseminated at stage 3 of ovarian development, 7 ... | 1993 | 8481531 |
| efficacy of injectable doramectin in the protection of castrated cattle against field infestations of cochliomyia hominivorax. | three studies were conducted in latin america--one in venezuela, one in argentina and one in brazil--using a common protocol to investigate the efficacy of a single subcutaneous injection of doramectin in the prevention and control of cochliomyia hominivorax infestations in castrated cattle. in each study, two groups of 20-28 animals each were allocated to a treated (t1) or to a control (t2) group on the basis of body weights. animals of t1 received doramectin at 200 micrograms kg-1 (1 ml per 50 ... | 1995 | 8533272 |
| genetic variability in mitochondrial dna of the screwworm, cochliomyia hominivorax (diptera: calliphoridae), from brazil. | restriction fragment length polymorphism (rflp) analysis of mitochondrial dna (mtdna) was used to examine genetic variation and population structure of screwworm flies in four populations from são paulo state, brazil. the total dna of 405 individuals was digested with 15 restriction endonucleases and probed with five cloned hindiii fragments representing the entire mitochondrial genome of cochliomyia hominivorax. the survey revealed that four enzymes (haeiii, hindiii, mspi, and pvuii) were suita ... | 1995 | 8595051 |
| mitochondrial dna variation in screwworm. | polymerase chain reaction-restriction fragment length polymorphism (pcr-rflp) analysis was used to characterize mitochondrial dna (mtdna) variation in screwworms, cochliomyia hominivorax, and secondary screwworm, c.macellaria, from the caribbean, north america and south america. four amplicons, totaling 7.1 kb, were analysed with sixteen restriction enzymes. a total of 133 restriction sites was observed in the two species, 104 in c.hominivorax, of which nineteen were variable, and ninety-five in ... | 1996 | 8744709 |
| myiasis in humans: an overview and a report of two cases in the republic of panama. | this paper on myiasis provides varied references from documented sources as an overall review. a review of two case studies, a primary screwworm (cochliomyia hominivorax) infestation and a human botfly (dermatobia hominis) infestation, as well as information on approaches to positive intervention and remediation are presented. human myiasis found in the subtropical and tropical regions of the world is a health threat. as a result of the military's expanding role in medical support to various reg ... | 1996 | 8772307 |
| isolation and identification of bacteria associated with the screwworm fly cochliomyia hominivorax, coquerel and its myiasis. | we studied eight different myiasis of sheep caused by screwworm flies under laboratory conditions. swabs were taken from the wound, before, during, and after the myiasis. seven hundred and thirty-one samples were streaked on different bacteriological media. all samples were identified by api system (biomerieuex). we found thirty-eight different bacterial species in the exudates from the myiasis (before, during, and after the parasitic cycle). the analysis of bacterial flora of the screwworm show ... | 1996 | 8784507 |
| incidence of bovine myiasis (cochliomyia hominivorax) in the central area of argentina. | | 1996 | 8784524 |
| the role of botfly myiasis due to dermatobia hominis l.jr. (diptera:cuterebridae) as a predisposing factor to new world screwworm myiasis (cochliomyia hominivorax coquerel) (diptera:calliphoridae). | in the tropics, the botfly dermatobia hominis and the nws cochliomyia hominivorax are the most important myiasis agents in cattle. it is frequently reported that furuncular lesions due to d. hominis are a predisposing cause for screwworm myiasis. our results pointed out that only 5.2 to 7.4% of c. hominivorax gravid females oviposited in the offered furuncular lesions. of 3242 eggs layed on botfly lesions (bfl), only 82 (2.5%) developed to second instar and died. in the flies tested, the furuncu ... | 1996 | 8784525 |
| larvicidal activity of abamectin against natural cochliomyia hominivorax larva infestation. | | 1996 | 8784526 |
| identification of screwworm species by polymerase chain reaction-restriction fragment length polymorphism. | restriction fragment length polymorphisms in polymerase chain reaction amplified fragments (pcr-rflp) of mitochondrial dna were used to differentiate species of new world screwworms (diptera: calliphoridae). twenty-seven restriction enzymes were screened on five regions of mtdna. eleven restriction fragment length patterns differentiated new world screwworm, cochliomyia hominivorax (coquerel), from secondary screwworm, cochliomyia macellaria (f.). five restriction fragment length patterns were p ... | 1996 | 8834744 |
| mitochondrial dna restriction site map of cochliomyia macellaria (diptera:calliphoridae). | the mitochondrial dna of the secondary screwworm, cochliomyia macellaria (f.), was cleaved with 15 restriction endonucleases to produce 54 restriction fragments. forty-three restriction sites recognized by 12 enzymes were assigned positions on a restriction site map. both the restriction fragments and the restriction site map were compared with published data from the screwworm, cochliomyia hominivorax (coquerel). the restriction site maps were aligned using a combination of highly conserved res ... | 1996 | 8840699 |
| population genetics and gene variation in screwworms (diptera: calliphoridae) from brazil. | allozyme variation in new world screwworm, cochliomyia hominivorax (coquerel), populations from brazil was examined. variability was observed in 8 of 13 enzyme loci and the frequency of the most common allele was < 0.95 for seven loci. observed and expected heterozygosities were 0.159 and 0.165, respectively. comparisons of the brazilian populations with previously studied populations from costa rica resulted in nei's genetic distances of between 0.000 and 0.006, with the greatest distance being ... | 1996 | 8935994 |
| did the sterile insect technique or weather eradicate screwworms (diptera:calliphoridae) from libya? | the american screwworm, cochliomyia hominivorax coquerel, was detected in northwestern libya in 1988. by august 1990, a screwworm epizootic extended over 26,000 km2 but collapsed in december and disappeared in april 1991. the relative contributions of winter weather and sterile insect releases on screwworm eradication in libya were assessed by using temperature data and population demography. a screwworm overwintering threshold mean temperature of approximately 9.7 degrees c for 3 mo is supporte ... | 1996 | 8961634 |
| [presence in cuba of screw worms (cochliomyia hominivorax) in the livestock]. | screw-worms (cochliomyia hominivorax coquerel) constitute a serious plight for livestock in the new world, because they inflict high losses on animals and man. a survey was done by means of an epizootic surveillance system with geographic squares to check for the presence of the insects in cuba. screw-worms were detected in 54.8% of myiasis cases all over the island, affecting various animals species, cattle first, followed by swine, sheep and others. small injuries appeared to be the main enabl ... | 1996 | 9091994 |
| protective efficacy of doramectin and ivermectin against cochliomyia hominivorax. | two studies were conducted in brazil using induced infestations of the new world screwworm, cochliomyia hominivorax, to investigate: a) the comparative prophylactic efficacy of doramectin and ivermectin at their recommended use levels (200 micrograms kg-1 s.c.), and b) the duration of protection of a single injection of doramectin. in the comparative efficacy study, two groups of six animals each were treated with ivermectin or doramectin. two hours after treatment, four incisions were made. eac ... | 1997 | 9403981 |
| prophylactic use of ivermectin against cattle myiasis caused by cochliomyia hominivorax (coquerel, 1858). | the prophylactic efficacy of ivermectin against navel or scrotal myiasis in calves was evaluated in eight trials in argentina and brazil. in two trials, calves were injected subcutaneously with ivermectin at a dosage of at least 200 microg kg(-1) within 24 h of birth. in the other six trials, two with two-month-old calves and four with four-month-old or older calves, all calves were treated with ivermectin at a dosage of at least 200 microg kg(-1) immediately after castration. in all trials, cal ... | 1997 | 9404848 |
| efficacy of dicyclanil in the prevention of screwworm infestation (cochliomyia hominivorax) in cattle castration wounds. | a field trial was carried out during summer 1996 in a commercial beef cattle farm located in the central area of argentina (30 degrees 16's, 60 degrees 30'w) to evaluate the efficacy of a new insect growth regulator material (dicyclanil) in the prevention of myiosis caused by screwworm (cochliomyia hominivorax) larvae. forty bull calves (bos indicus x bos taurus), 5 to 6 months old were allocated by ranked paris to a control (g.1) and a treated group (g.2) of the same number of animals. on day 0 ... | 1998 | 9615956 |
| effect of management practices on screw-worm among sheep in são paulo state, brazil. | the screw-worm cochliomyia hominivorax (coquerel), whose larvae develop in wild and domestic animals as well as in man, is one of the major causes of myiasis in brazil. sheep raising is expanding in the state of são paulo, where information about the infestation of screw-worm is necessary for appropriate control measures. the present data were obtained from questionnaires sent to all sheep breeders belonging to associacão paulista de criadores de ovinos--aspaco (são paulo state association of sh ... | 1998 | 9719843 |