Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| electron microscopic anatomy of motile-phase and germinating cells of dermatophilus congolensis. | 1967 | 6064443 | |
| a phylogenetic analysis of the family dermatophilaceae. | the comparative analysis of the 16s ribosomal ribonucleic acid (rrna) of geodermatophilus obscurus dsm 43060 and dermatophilus congolensis dsm 43037 revealed that these members of the family dermatophilaceae were only remotely related. while g. obscurus represented an individual and separate line of descent within the phylogenetically defined order actinomycetales, d. congolensis was closely related to representatives of arthrobacter, micrococcus, cellulomonas, brevibacterium, promicromonospora ... | 1983 | 6195302 |
| comparison of dermatophilus congolensis precipitating antigens prepared by three methods. | 1983 | 6411286 | |
| development of an artificial infection technique for examining the susceptibility of sheep to dermatophilus congolensis. | 1984 | 6517788 | |
| porcine epidermitis and dermatitis associated with staphylococcus hyicus and dermatophilus congolensis infections. | 1983 | 6643216 | |
| infection with dermatophilus congolensis at a contact hypersensitivity site and its relevance to chronic streptothricosis lesions in the cattle of west africa. | guinea-pigs were sensitized to cdnb and infected with d. congolensis at the site of a subsequent application of this chemical. the bacterium was recovered from the skin over a longer period of time in sensitized individuals than in nonsensitized controls. animals rendered tolerant to the chemical gave lower yields of bacteria than sensitized animals. however, the lesions produced at the site of infection did not become chronic. the growth of d. congolensis at a contact hypersensitivity site may ... | 1984 | 6699227 |
| granulomatous sub-dermal lesions in sheep inoculated with dermatophilus congolensis. | dermatophilus congolensis was inoculated subcutaneously into 6 ewes and the resulting lesions were examined by light and electron microscopy. the organism was recovered from the subcutaneous lesions. the lesions were suppurative in the early stages and granulomatous in the advanced stage, but abscesses were the usual lesion observed. the granulomas were composed of several layers; central bacterial colony, neutrophil layer, layer of macrophages, epithelioid cells and langhans and foreign body ty ... | 1984 | 6699228 |
| case of dermatophilus congolensis infection in a two-day-old calf. | 1984 | 6730240 | |
| prevalence of antibodies to dermatophilus congolensis in sheep and goats in nigeria. | a serological survey on dermatophilosis was carried out amongst sheep and goats in kaduna state of nigeria. sera were obtained from slaughter animals and from sheep kept on an isolated ranch. the percentage of seropositive animals was 28.0 in slaughter sheep, 0.0 in sheep kept on the ranch, and 23.2 in slaughter goats. the high prevalence of d. congolensis antibodies among small ruminants compares well with the level of prevalence reported of cattle of cattle and calls for a concerted government ... | 1984 | 6730289 |
| the reverse single radial immunodiffusion technique for detecting antibodies to dermatophilus congolensis. | the reverse single radial immunodiffusion technique was used to detect dermatophilus congolensis antibody in sera collected from animals previously infected to varying levels with d congolensis. ammonium sulphate and trichloroacetic acid extracts of five different strains of d congolensis obtained from different geographical locations were used as antigens. all the extracts showed variations in their sensitivities in detecting d congolensis antibody in the various serum samples. multiple antibod ... | 1980 | 6776677 |
| detection of dermatophilus congolensis antibody in the milk of streptothricosis infected cows. | passive haemagglutination and agar gel diffusion tests were used to detect specific antibody to dermatophilus congolensis antigens in serum and milk of eight streptothricosis infected friesian milking cows. all the sera and milk samples showed the presence of antibody but titres were higher in sera. precipitating antibodies were detected only in three sera. a possible implication of this finding is discussed with respect to passive immunity in the young calves from infected dams. | 1981 | 6789425 |
| serodiagnosis of dermatophilus congolensis infection by counterimmunoelectrophoresis. | sixty-one sera from animals that had contact with dermatophilus congolensis were examined by comparing three serological methods; counterimmunoelectrophoresis, passive haemagglutination, and agar gel diffusion, and by using four different antigenic extracts of d congolensis. the counterimmunoelectrophoresis was the most satisfactory of the methods having been found to be specific and sensitive, easy to perform and suitable for screening large numbers of samples. it was also found to have a highe ... | 1982 | 6818646 |
| an in vivo method of assay for dermatophilus congolensis. | an in vivo method of assay for dermatophitus congolensis in rats is described. the optimal conditions for preparing skin before infection and subsequently harvesting the zoospores from infected skin were investigated. these experiments showed that clipping the skin had no effect on infection with this bacterium and that when the infected skin was soaked in water, increased amounts of dissolved co2 had no effect on the release of zoospores, which was maximal within 2.5 h of immersion. vaccination ... | 1983 | 6841688 |
| subcutaneous and lymph node granulomas due to dermatophilus congolensis in a steer. | 1983 | 6849215 | |
| staphylococcus hyicus in skin lesions of horses. | staphylococcus hyicus (subspecies hyicus) was isolated as the only pathogenic organism from two independent cases of dermatitis of the lower parts of the limbs (grease heel) in horses. the organism was recovered together with other pathogenic staphylococci from similar conditions in two other horses of different origins. these conditions were characterised by epidermolysis, alopecia and crust formation. they responded quickly to antibiotic treatment. the organism was also isolated from a long st ... | 1983 | 6884317 |
| the association between body strike and dermatophilosis of sheep under controlled conditions. | the association of dermatophilosis with body strike of sheep caused by lucilia cuprina was studied in a controlled environment. when sheep with areas of wet normal fleece and areas of wet fleece containing scabs induced by infection of the skin with dermatophilus congolensis were exposed to gravid l. cuprina the files oviposited only on dermatophilosis-affected areas. in wet dermatophilosis-affected fleece, naturally oviposited l. cuprina eggs hatched and the larvae developed to the second insta ... | 1981 | 6895592 |
| pathogenicity and transmission of dermatophilus congolensis isolated from cattle in puerto rico. | 1980 | 6947286 | |
| dermatophilus congolensis as a model pathogen in mice for the investigation of factors influencing skin infection. | 1982 | 7059783 | |
| numerical classification of sporoactinomycetes containing meso-diaminopimelic acid in the cell wall. | one hundred and thirty actinomycetes representing 19 genera and 50 species were compared in a numerical phenetic survey using 108 unit characters. data were examined using the simple matching (ssm), jaccard (sj) and pattern (dp) coefficients and clustering was achieved using both the single and unweighted pair group average algorithms. cluster composition was barely affected by the statistics used or by test error, estimated at 2.1%. over 80% of the strains were assigned to 2 clusters containing ... | 1982 | 7077300 |
| a case report of dermatophilus congolensis in a dog at the freetown veterinary clinic. | 1982 | 7171368 | |
| fungal growth in aphakic soft contact lenses. | fungal growth was detected in two aphakic hydrophilic contact lenses. aspergillus species was cultured from the extended-wear contact lens and dermatophilus congolensis was identified by specific antibody staining of the daily-wear contact lens. as in the 16 previously described cases of fungal contact lens growth, our patients had no evidence of ocular infection but did experience irritation which cleared up when contact lens wear was discontinued. although only a small percentage of contact le ... | 1981 | 7234946 |
| resistance of dermatophilus congolensis and the effect of vitamin supplementation on the growth of the organism. | 1981 | 7260568 | |
| preliminary investigation on the ecology of dermatophilus congolensis. | 1981 | 7278873 | |
| primary and secondary humoral immune responses in cattle experimentally infected with dermatophilus congolensis. | 1981 | 7296020 | |
| the pattern of sensitivity of a dermatophilus congolensis (d. congolensis) strain to various antibiotics in vitro, in nigeria. | 1981 | 7313224 | |
| the inoculation of rabbits with dermatophilus congolensis and the simultaneous infection of sheep with d. congolensis and orf virus. | 1981 | 7320237 | |
| serum and skin surface antibody responses to intradermal vaccination of cattle with dermatophilus congolensis. | 1981 | 7326559 | |
| dermatophilus congolensis infections in wildlife in new york state. | dermatophilus congolensis infection is described for the first time in a woodchuck (marmota monax) and a striped skunk (mephitis mephitis). this actinomycete was also recovered from a raccoon (procyon lotor) carcass which had been frozen for a year. encrusted lesions or denuded patches or both were seen during necropsy on the head, thorax, abdomen, and legs of each carcass. d. congolensis was demonstrated in strained smears or paraffin sections or both from the three animals and was recovered fr ... | 1981 | 7334073 |
| measurement of antibody to dermatophilus congolensis in sera from cattle in the west of scotland by enzyme-linked immunosorbent assay. | serum antibody titres to dermatophilus congolensis demonstrated by an enzyme-linked immunosorbent assay (elisa) in young steers and in adult cows from an ayrshire herd showed a bimodal distribution and provided evidence of subclinical infection. very high titres detected in sera from crossbred galloway steers were indicative of recent or existing infection which may have been masked by concurrent ringworm. the elisa is a sensitive and technically simple method which enables sera to be screened f ... | 1981 | 7340080 |
| occurrence of bovine dermatophilosis in the southernmost islands of japan. | such cutaneous symptoms as characteristic incrustation and alopecia were noticed in 25 calves of the indigenous japanese black breed grazing on subtropical islands in japan over a period of april, 1978 to february, 1980. these islands were ishigaki, kuro, yonaguni and tarama belonging to the sakishima islands. microbiological and pathological examination on three of these calves revealed that the calves were affected with dermatophilosis caused by dermatophilus congolensis. the disease in these ... | 1981 | 7341992 |
| the effect of climate on experimental infection of bovine skin with dermatophilus congolensis. | 1980 | 7397466 | |
| pathologic changes in lizards (agama agama) experimentally infected with dermatophilus congolensis. | captive laboratory-held lizards (agama agama) experimentally inoculated with dermatophilus congolensis by subcutaneous, intramuscular and intraperitoneal routes developed pyogranulomatous and necrotic lesions at and around the sites of inoculation. d. congolensis was consistently cultured from the lesions even at 75 days post inoculation. histopathologic examination of selected organs and tissues showed granulomatous caseous abscesses in the dermis, subcutaneous tissue and liver, edema of the de ... | 1980 | 7411747 |
| the epizootiology of dermatophilus congolensis infection. | 1980 | 7455278 | |
| inhibition of dermatophilus congolensis infection in a mouse model by antibiotic-producing staphylococci. | in an acute model of skin infection with dermatophilus congolensis in the mouse, lesions can be prevented by simultaneous application of staphylococci which produce antibiotics; non-producer staphylococci fail to inhibit lesion formation. | 1980 | 7459258 |
| culture filtrate proteins of dermatophilus congolensis. | in previous studies on the antigens of dermatophilus congolensis very little attention has been given to the hyphae and to excreted-secreted products (esp) of actively growing bacteria. in this study we have grown four isolates of d. congolensis in a serum free synthetic liquid culture medium based on rpmi 1640. diafiltration and ultrafiltration were used to prepare esp from infected culture fluid. these methods produced sufficient quantities of esp that the polypeptide profiles of the four isol ... | 1993 | 7510898 |
| [dermatophilus congolensis infection in brandenburg]. | at first time dermatophilus (d.) congolensis-infection was diagnosed in brandenburg in 3 sheep herds and in one horse, which had contact to diseased sheep. the causative agent was introduced from west-germany probably. cause of the disease was influenced by a longer rain period and by secondary infections through staph. aureus var. ovis. the morbidity came up to 90%, the mortality of lambs was 10%. clinical picture, diagnostic and control of the disease are described. economical losses are cause ... | 1995 | 7600948 |
| the effect of inflammatory and hypersensitive reactions, in response to the feeding of the tick amblyomma variegatum, on the progression of experimental dermatophilosis infections. | initial infestations of amblyomma variegatum larvae and nymphs, on rabbits and sheep respectively, produced inflammatory reactions in the host's skin; repeated infestations resulted in an increase in development of delayed type hypersensitive reactions. dermatophilus congolensis cocci were applied in titrated doses to hosts at sites of inflammatory or hypersensitive reactions to ticks, and to control hosts with no exposure to ticks. we assessed the resulting infections for three weeks and found ... | 1993 | 7628231 |
| the local effect of hypersensitive or inflammatory reactions to nymphal amblyomma variegatum on simultaneous infections with dermatophilus congolensis. | amblyomma variegatum nymphs were applied to sites infected with dermatophilus congolensis on eight rabbits. four rabbits were previously sensitized to the feeding of nymphal a. variegatum to produce hypersensitive reactions to the tick feeding; the remaining four rabbits had no previous exposure to nymphal a. variegatum and produced inflammatory reactions to the tick feeding. the resulting dermatophilosis infections were assessed for three weeks and there was a correlation between the position o ... | 1993 | 7628235 |
| genetic analysis of dermatophilus spp. using multilocus enzyme electrophoresis. | multilocus enzyme electrophoresis was used to examine a collection of 41 mainly australian isolates of dermatophilus congolensis that had been cultured from sheep, cattle, horses, a goat, a marsupial and chelonids. allelic variation was examined at 16 enzyme loci. the isolates were divided into eight distinct electrophoretic types (ets) with a mean genetic diversity per locus of 0.41. the three isolates from chelonids represented a distinct clone in et 1 which was separated from the remaining cl ... | 1995 | 7734826 |
| dermatophilosis (cutaneous streptothricosis) in kafue lechwe (kobus leche kafuensis). | extensive dermatitis caused by dermatophilus congolensis was identified in two kafue lechwe (kobus leche kafuensis) in lochinvar national park of zambia. the lesions were characterized by thickening of the skin, crusts, and nodfule formation. almost all parts of the body were affected. histologically there was an exudative dermatitis with acanthosis, parakeratosis, hyperkeratosis, and an exudate rich in neutrophils. this is the first known report of dermatophilosis in lechwe. | 1994 | 7760496 |
| isolation of dermatophilus congolensis phage from the 'lumpy wool' of sheep in western australia. | a lytic phage with species-specific activity was isolated from wool samples infected with the actinomycete dermatophilus congolensis, the agent of 'lumpy wool', collected from properties in western australia. the physiochemical properties, plaque morphology, host range and particle morphology of the phage isolated were characterized. the isolated phage reduced the cell numbers of dermatophilus congolensis on infected wool samples in vitro. it may therefore have potential as a biocontrol agent of ... | 1995 | 7766113 |
| dermatophilus chelonae sp. nov., isolated from chelonids in australia. | three isolates of a previously undescribed dermatophilus sp. obtained from chelonids (two strains obtained from turtles and one strain obtained from a tortoise) were compared with 30 dermatophilus congolensis isolates obtained from australian mammals. the microscopic appearance, the colony morphology, and most biochemical test results for the chelonid isolates were characteristic of the genus dermatophilus. our isolates differed from the mammalian d. congolensis isolates in a number of cultural ... | 1995 | 7857807 |
| heterogeneity among dermatophilus congolensis isolates demonstrated by restriction fragment length polymorphisms. | there is evidence of antigenic diversity and of differences in virulence in dermatophilus congolensis. for the understanding of the epidemiology of dermatophilosis it is important to distinguish between strains of the organism. twenty field isolates from cattle in chad and cameroon, and an american reference strain, have been examined on restriction fragment length polymorphisms. after restriction enzyme digestion of dna by bamhi and southern blotting, a rdna probe consisting of plasmid pmc5 car ... | 1993 | 7907804 |
| an indirect fluorescent antibody technique for detection of anti-dermatophilus congolensis antibodies in sheep. | an indirect fluorescent antibody (ifa) technique has been developed for detection of anti-dermatophilus antibodies in sheep. sera from 25 bacteriologically confirmed clinically affected sheep and from 10 negative non affected lambs were used. whole cell antigen from brain heart infusion cultures of d. congolensis was used and all sera were tested in the same way for cross-reactivity against antigens obtained from cultures of actinomyces viscosus, micrococcus luteus, nocardia asteroides, and cory ... | 1994 | 7941032 |
| dermatophilosis in sheep: first report in italy, experimental reproduction and evaluation of immune response. | a severe exudative-crustous and proliferous dermatitis in a 2 year old sheep caused by dermatophilus congolensis (observed for the first time in italy), is reported. the disease was reproduced experimentally in sheep, goats, rabbits and guinea pigs, whose skin was treated in different ways before infection. e.l.i.s.a. and immunoblotting tests carried out in experimentally infected sheep, showed the antigenic complexity of the pathogen and the existence of cross-immunity to the protein components ... | 1993 | 8003293 |
| in vitro studies of dermatophilus congolensis antimicrobial susceptibility by determining minimal inhibitory and bacteriocidal concentrations. | the minimal inhibitory concentration (mic) and minimal bacteriocidal concentration (mbc) of 19 antimicrobials on 16 isolates of d. congolensis were determined. the potential field efficacy of the agents was evaluated by comparing the results with serum levels of drug unbound to proteins and the in vitro and in vivo findings of other authors. a modified standard microtechnique was used for serial dilution-antimicrobial sensitivity and found to be easy and reproducible. erythromycin, spiramycin, p ... | 1994 | 8025850 |
| variation in cultural, morphological, biochemical properties and infectivity of australian isolates of dermatophilus congolensis. | recent vaccination studies with dermatophilus congolensis showed that variation of challenge strains had a considerable influence on protection afforded by the vaccines. in this study cultural, morphological and biochemical properties of 30 d. congolensis isolates from throughout australian were investigated. the infective dose required to produce lesions of equivalent severity by these isolates for sheep, rabbits and guinea pigs was also examined and the isolates were grouped into four clusters ... | 1993 | 8128605 |
| experimental dermatophilosis in murine models of immunodeficiency. | gnotobiotic mice with congenital immune deficiencies were infected with the skin pathogen dermatophilus congolensis. athymic (nude) mice with t cell deficiency were less susceptible than nude mice which also carried the beige mutation (beige-nude) with nk cell and granulocyte defects, as part of the murine equivalent of chediak-higashi syndrome. the additional presence of the x-linked immunodeficiency gene in other beige mutant mice, giving reduced b cell responsiveness, did not increase their s ... | 1993 | 8134640 |
| cellular responses in experimental chronic and acute dermatophilosis infections of sheep. | the cellular infiltrate into the dermis in dermatophilosis lesions is composed of a range of cell types. the aim of this study was to establish if the composition of the cellular infiltrate in chronic lesions was different from that in healing lesions. experimental dermatophilus congolensis infections of sheep were used to study the sequential changes in cell types during the course of chronic and acute infections. infestations of adult amblyomma variegatum ticks were used to produce chronic les ... | 1993 | 8134642 |
| study of efficacy of lamstreptocide a & b on cases of dermatophilosis within the caribbean. | the efficacy of lamstreptocide a & b was studied on 9 natural cases of bovine and caprine dermatophilosis in 8 different farms in st. kitts, employing standard histopathologic and bacteriological methods. the lesions of 5 of the treated cases were dried-up, and there was marked peeling-off of scabs of a severely affected case exposing erythematous underlying tissue, at 3 weeks post-application of the product. apart from 3 mild cases which were not available for follow-up studies and which were r ... | 1993 | 8134646 |
| the systemic effect of adult and immature amblyomma variegatum ticks on the pathogenesis of dermatophilosis. | the systemic effect of adult and nymphal amblyomma variegatum on the pathogenesis of experimental infections of dermatophilus congolensis was investigated. three groups of four sheep were used with all 12 sheep being infected with identical titrated doses of d. congolensis one group of sheep was simultaneously infested with adult a. variegatum the second with nymphal a. variegatum and the third group were the controls, with no exposure to ticks. assessment of the resulting infections indicate th ... | 1993 | 8134648 |
| epidemiological studies on dermatophilosis in the caribbean. | dermatophilosis is one of the most important diseases of domestic ruminants in the caribbean islands where the clinical disease has been shown to be associated with the presence of the tick amblyomma variegatum. seroepidemiological studies were conducted to clarify the epidemiology of the disease in the region with a particular attention paid to the role of a. variegatum. a bank of 1300 cattle sera from the lesser antilles was screened by elisa for the presence of antibodies to dermatophilus con ... | 1993 | 8161379 |
| temporal changes in the granulocytic responses to experimental infection of the skin of mice and sheep with dermatophilus congolensis. | the patterns of dermal inflammatory cell response to infection with dermatophilosis congolensis were determined in mice and sheep from histological samples taken before and at intervals after topical application of infective zoospores to ether-swabbed skin. neutrophils, eosinophils, basophils and mast cells were identified by histochemical staining. temporal changes in the b cell, t cell, and mhc class ii+ dendritic cell populations form part of a separate report. the filamentous stages of the b ... | 1993 | 8166871 |
| enzymatic activities of dermatophilus congolensis measured by api zym. | api zym kit was used to test enzymatic activities on eighteen strains of dermatophilus congolensis. all strains produced lipase and acid phosphatase, which act on lipids, and leucine arylamidase which act on proteins. another 10 exoenzymes were present in at least one of the strains. | 1993 | 8296446 |
| dermatophilus congolensis human infection. | four cases of human dermatophilosis observed in rio de janeiro, brazil, are reported. data that suggest nail infection by dermatophilus congolensis are presented. the clinical spectrum of the disease ranged from an asymptomatic infection to a pustular eruption. our findings suggest that epidermal langerhans cells play a role in the pathogenesis of the infection. | 1993 | 8340513 |
| antigenicity of dermatophilus congolensis hemolysin. | the separated cell-free form of hemolytic exosubstance was obtained from five strains of dermatophilus congolensis. three strains produced exosubstance with high activity, two strains produced exosubstance with lower intensity of activity. the separated forms exhibited the same hemolytic interactions as the native forms produced by growing strains, namely the antagonism with staphylococcal beta hemolysin and the synergism with staphylococcal delta hemolysin, streptococcal camp factor and rhodoco ... | 1993 | 8342370 |
| an enzyme-linked immunosorbent assay for the epidemiological survey of dermatophilus congolensis infection in camels (camelus dromedarius). | the breeding of camels (camelus dromedarius) is especially important in arid and semi-arid areas of africa, where drought and famine frequently occur. a number of diseases which impair camel production have recently been described, including dermatophilosis (caused by dermatophilus congolensis). however, it is not possible to determine the prevalence of infection from clinical cases alone. an enzyme-linked immunosorbent assay has therefore been developed to determine the epidemiological prevalen ... | 1993 | 8400399 |
| dermatophilus congolensis infection (dermatophilosis) in animals and man! an update. | dermatophilus congolensis infection (dermatophilosis) is an acute, subacute or chronic skin disease affecting a wide range of species of animals and man. it is world widely distributed but more prevalent in the humid, tropics and subtropics. the disease is now being reviewed in detail. in the present review, the geographical distribution, history and nomenclature, animal hosts affected, aetiological agent and clinical signs of the disease are discussed extensively. emphasis is also given on the ... | 1993 | 8403836 |
| development of a single dilution elisa to detect antibody to dermatophilus congolensis in goat and cattle sera. | a solid phase immunosorbent assay to detect antibodies to dermatophilus congolensis in ruminant sera was developed to be used as a single dilution elisa in large epidemiological surveys. optimal conditions for the test are described. the use of blocking proteins to reduce non specific binding was necessary. non fat dry cow milk and fetal calf serum were the only two efficient blocking agents out of six tested. comparison of 4 antigenic fractions obtained after sonication and differential centrif ... | 1993 | 8447078 |
| prevalence in india of dermatophilus congolensis infection in clinical specimens from animals and humans. | a total of 257 samples (from 51 cattle, 43 buffalo, 32 goats, 25 dogs, 23 horses, 14 fowl, 9 camels, 7 rabbits, 5 donkeys, 4 antelopes, 3 pigs, 2 monkeys, 1 bear and 38 humans, all with cutaneous disorders) were examined for the presence of dermatophilus congolensis using standard microbiological techniques. dermatophilus was identified in 14 specimens (5.45%) both by direct microscopy and by cultural isolation of the pathogen from cutaneous specimens. the infection was recorded in 2 humans, 6 c ... | 1995 | 8593415 |
| an amino acid sequence coded by the exon 2 of the bola drb3 gene associated with a bola class i specificity constitutes a likely genetic marker of resistance to dermatophilosis in brahman zebu cattle of martinique (fwi). | one hundred and twenty-seven brahman cattle from several locations in martinique (fwi), reared under different environmental conditions, were followed over three years and checked for clinical signs of dermatophilosis. to confirm that these animals had been in contact with the pathogen dermatophilus congolensis, their sera were tested by elisa. on the basis of this epidemiological study, 12 animals were classified as resistant (seropositive without clinical signs), belonging to herds in which th ... | 1996 | 8784500 |
| the pathogenesis of dermatophilosis. | pathogen, host and environmental factors must be considered in order to understand the pathogenesis of dermatophilosis. a frequently cited sequence of events involves physical damage to the skin, bacterial multiplication in the epidermis, repeated cycles of invasion by hyphae, infiltration by neutrophils and exudate, regeneration of epidermis and reinvasion. this paper is concerned with pathogen driven mechanisms involved in the origin and development of dermatophilus congolensis infections. pri ... | 1996 | 8809989 |
| the responses of lucilia cuprina to odours from sheep, offal and bacterial cultures. | the responses of gravid female lucilia cuprina to odours from sheep urine, faeces and gut mucus, and to odours from liver/sodium sulphide mixtures was tested using a bioassay which measured the movement and probing response of walking flies. the same bioassay was used to test the response to odours from cultures of bacteria isolated from liver/sodium sulphide and liver/water mixtures. a significant movement towards odours from faeces, gut mucus and urine was observed. odours from cultures of the ... | 1997 | 9061678 |
| dermatophilus congolensis: strain differences in expression of phospholipase activities. | interactions between dermatophilus congolensis strains and with other bacteria of known haemolytic activities were used to elucidate the complex nature of haemolytic activities present in various d. congolensis strains. this was further analysed by measuring their specific phospholipase activities against defined substrates by thin layer chromatography. d. congolensis strains demonstrated haemolytic interactions (synergistic or antagonistic) with other d. congolensis strains and also other speci ... | 1997 | 9355255 |
| suspected dermatophilosis in an adult orangutan (pongo pygmaeus pygmaeus). | an adult female bornean orangutan (pongo pygmaeus pygmaeus) had a pruritic, vesicular skin disease, particularly of the extremities, trunk, and face. over a 2-yr course, symptoms resolved only transiently after corticosteroid treatment. antibiotic treatment and withdrawal of all corticosteroids resulted in complete recovery of the animal and return to normal activity patterns. on the basis of the dermal histopathologic lesions, dermatophilus congolensis was suspected as the causative organism, a ... | 1997 | 9365949 |
| use of degenerate primers and heat-soaked polymerase chain reaction (pcr) to clone a serine protease antigen from dermatophilus congolensis. | serine proteases are thought to be involved in the initial attack on sheep skin by dermatophilus congolensis and are obvious antigens for inclusion in a vaccine to prevent lumpy wool disease (dermatophilosis). degenerate primers were designed after alignment of seven bacterial serine proteases. inosine was incorporated into the primers at positions of three- and four-base redundancy, and this reduced the complexity of the primer mixtures from several thousand to sixteen different sequences for e ... | 1997 | 9429897 |
| electrophoretic and antigenic characterisation of dermatophilus congolensis extracellular products. | dermatophilus congolensis is the causative agent of bovine dermatophilosis and lumpy wool in sheep. two field isolates of d. congolensis, one each from a cow in ghana and a sheep in scotland, were cultured for 24-72 h in a synthetic medium based on rpmi-1640. culture filtrates were examined by sds-page and considered to contain extracellular products released by growing hyphae and filaments. electrophoretic profiles of culture filtrates of the two isolates contained common bands and bands that w ... | 1997 | 9460195 |
| [hemolysis and hemolytic interactions of bacteria]. | the review contains data on haemolytically active bacteria important in medical microbiology, human or veterinary. attention is paid to haemolytically active bacterial metabolites, especially those which produce synergistic or antagonistic haemolytic reactions above all with staphylococcal haemolysins alpha, beta and delta, with corynebacterial phospholipase d, with rhodococcal equi factor and with the haemolysin of dermatophilus congolensis. the general usage of the term "camp factor" for all m ... | 1997 | 9471300 |
| bacteriological study of ethiopian isolates of dermatophilus congolensis. | 1998 | 9719842 | |
| preliminary characterisation of extracellular serine proteases of dermatophilus congolensis isolates from cattle, sheep and horses. | dermatophilus congolensis is a filamentous branching actinomycete that causes dermatophilosis, an exudative dermatitis in ruminants. the pathogenesis of this disease is poorly understood and virulence factors of d. congolensis have not been characterised. culture filtrate (cf) of 14 d. congolensis isolates from cattle, 15 from sheep and four from horses were examined for proteolytic activity using azocasein as a non-specific substrate. the isolates were from a variety of geographical locations. ... | 1998 | 9791878 |
| [phenotypic characterization of equine dermatophilus congolensis field isolates]. | in 1993 and 1994 a highly increased occurrence of equine dermatophilosis was observed, and a study was initiated to determine phenotypic heterogeneity among 120 clinical isolates using biochemistry, antibiotic resistance profiles, membrane protein profiles and western blotting. the biochemical examinations contained 1% equine serum in medium. moreover, the api zym-test from biomérieux was used. the biochemical reactions were suited to identify dermatophilus congolensis but did not allow a differ ... | 1998 | 9818459 |
| outbreaks of dermatophilus congolensis infection in camels (camelus dromedarius) from the butana region in eastern sudan. | natural dermatophilus congolensis infection of camels has been reported in kenya in semi-arid areas. research is being conducted to discover how widespread the condition is in neighbouring countries with similar eco-climatic conditions. severe skin infections of camels from the butana region of eastern sudan were examined. the infections were first found in two herds of adult camels, of which 50%-75% of the animals were affected. in the other thirteen herds examined, camel calves were more likel ... | 1998 | 9850545 |
| an outbreak of a mixed infection of dermatophilus congolensis and microsporum gypseum in camels (camelus dromedarius) in saudi arabia. | although both dermatophilus congolensis and microsporum gypseum infections have been reported separately in camels, mixed infection involving both agents has not been reported to date. the authors describe a mixed infection of d. congolensis and m. gypseum in camels reared on a dairy farm in saudi arabia. a total of 131 out of 559 camels (23.4%) were affected. forty-eight camels less than one year of age had discrete, circumscribed, crusty, hairless lesions, found in particular on the neck and f ... | 1998 | 9850546 |
| immune responses to dermatophilus congolensis infections. | complex mechanisms underly the establishment of dermatophilosis, an exudative and proliferative skin disease of ruminants. this multicomponent system involves the bacterium dermatophilus congolensis, transmission by various routes including flies, host genetic factors and immunosuppression by amblyomma variegatum ticks. here, nick ambrose and colleagues summarize recent evidence for an association between a. variegatum and severe chronic dermatophilosis in cattle. breed-based differences in resi ... | 1999 | 10377534 |
| a comparison of extracted proteins of isolates of dermatophilus congolensis by sodium dodecyl sulphate-polyacrylamide gel electrophoresis and western blotting. | antigenic diversity within a collection of 18 isolates of dermatophilus congolensis from different continents was examined by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (sds-page) and by western blotting with sera from cattle with clinical dermatophilosis using whole cell extracts obtained by three methods and one extract of extracellular products of d. congolensis. one of the methods involving the release of a lysostaphin-solubilized protein (lsp) of whole cells of d. congolensi ... | 1999 | 10466501 |
| isolation of dermatophilus congolensis from a cat. | dermatophilus congolensis was isolated from a cat with dermatitis. the isolate was sensitive to oxytetracyclin, streptomycin and penicillin but resistant to ampicillin, amoxicillin, gentamycin and cefoperazone. | 2000 | 10763386 |
| [a diagnostic medium for arcanobacterium haemolyticum and other bacterial species reacting with hemolytic synergism to the equi-factor of rhodococcus equi]. | colonies of arcanobacterium haemolyticum on common blood agar can be easily overlooked. therefore a diagnostic medium was developed, on which a. haemolyticum colonies produce a conspicuous zone of complete hemolysis. the medium under question is blood agar prepared from the columbia blood agar base and 5% washed sheep erythrocytes sensitised with equi factor (ef) of rhodococcus equi. optimally, 10 activity units (au) of ef per 1 ml were used. ef was titrated on a non-nutrient medium consisting o ... | 2000 | 11040494 |
| survival of dermatophilus congolensis under laboratory conditions in nigeria. | 2001 | 11517986 | |
| dermatophilus congolensis infection in goats in tanzania. | when goats in eastern tanzania were screened for skin diseases, dermatophilus congolensis was isolated from the skin lesions in 8 of 484 animals examined. in one severely affected case, the disease was also characterized by histological studies (gram stain, giemsa stain and routine he studies) and electron microscopy. the histological picture was characterized by hyperkeratosis, parakeratosis, acanthosis, folliculitis and an inflammatory cellular reaction involving the epidermis. gram stain and ... | 2001 | 11556616 |
| dermatophilosis of alpine chamois (rupicapra rupicapra) in italy. | a proliferative dermatitis similar to the condition generally referred to as strawberry footrot was observed in two alpine chamois (rupicapra rupicapra) from eastern alps, italy. branching septated filaments and packets of pas-positive coccoid organisms were observed in histological sections of the affected skin. the actinomycete, dermatophilus congolensis, was isolated from crusted lesions in one chamois. as wild ruminants are presumed to be a reservoir of infection in the alpine area, the auth ... | 2002 | 11980380 |
| a simple random amplified polymorphic dna genotyping method for field isolates of dermatophilus congolensis. | dermatophilus congolensis is the pathogenic actinomycete that causes dermatophilosis in cattle, lumpy wool in sheep and rain scald in horses. phenotypic variation between isolates has previously been described, but its genetic basis, extent and importance have not been investigated. standard dna extraction methods are not always successful for d. congolensis due to its complex life cycle, one stage of which is encapsulated. here we describe the development of rapid and reliable dna extraction an ... | 2002 | 12019944 |
| kineosphaera limosa gen. nov., sp. nov., a novel gram-positive polyhydroxyalkanoate-accumulating coccus isolated from activated sludge. | a high-g+c gram-positive, motile, non-spore-forming coccus capable of accumulating significant amounts of polyhydroxyalkanoate (pha) was isolated from an inefficient biological phosphorus removal activated sludge reactor. the cell wall of strain lpha5t was characterized by the presence of meso-diaminopimelic acid, menaquinone mk-8(h4) and a complex fatty-acid pattern consisting of c16:0 and at least five other major straight-chain saturated and unsaturated fatty acids. strain lpha5t also had a h ... | 2002 | 12361296 |
| study on skin diseases in sheep from northern ethiopia. | a study was conducted to determine the cause and prevalence of skin diseases in local sheep from northern ethiopia. of 520 sheep examined 174 (33%) had skin diseases of different causes. the identified causes were lice infestation due to damalina ovis and linognatus africanus (21%), sheep pox (8%), sarcoptic mange (sarcoptic scab. var. ovis) (4%), dermatophilosis due to dermatophilus congolensis (3%), and orf (contagious ecthyma) (3%). there was no statistically significant (p > 0.05) associatio ... | 2003 | 12596667 |
| selection assisted by a bola-dr/dq haplotype against susceptibility to bovine dermatophilosis. | bovine dermatophilosis is a severe skin infection of tropical ruminants inducing a severe loss in productivity and a 15% mortality rate. this disease is caused by the actinomycete bacterium dermatophilus congolensis associated with the tick amblyomma variegatum. currently there are no prospects for a vaccine, and acaricide or antibiotic control is hampered by the development of chemoresistance. animal breeders have observed that dermatophilosis susceptibility seems to be determined genetically, ... | 2003 | 12927091 |
| the life cycle of dermatophilus dermatonomus, the causal agent of ovine mycotic dermatitis. | 1961 | 14037524 | |
| micromorphology of dermatophilus congolensis. | gordon, morris a. (division of laboratories and research, new york state department of health, albany), and mercedes r. edwards. micromorphology of dermatophilus congolensis. j. bacteriol. 86:1101-1115. 1963.-as seen in electron micrographs of thin sections, dermatophilus congolensis is a holocarpic actinomycete that fragments, after formation of septa in several planes, into sarcina-like packets and then into individual cocci. release of coccal forms from the filaments and packets is by dissolu ... | 1963 | 14080778 |
| synergistic effects of salts and carbon dioxide on dermatophilus dermatonomus. | 1964 | 14250803 | |
| characterisation of an extracellular serine protease gene (nasp gene) from dermatophilus congolensis. | a partial amino acid sequence of a serine protease from dermatophilus congolensis allowed the design of oligonucleotide primers that were complemented with additional ones from previously published partial sequences of the gene encoding the enzyme. the polymerase chain reaction (pcr), using combinations of specific and degenerate oligonucleotide primers, allowed the amplification of a 1738-bp internal fragment of the gene, which was finally characterised by inverse pcr as the first full-length s ... | 2004 | 14769466 |
| identification of an alkaline ceramidase gene from dermatophilus congolensis. | a random amplified polymorphic dna (rapd) procedure was used to identify a specific 0.6 kb dna fragment unique to dermatophilus congolensis. this 0.6 kb fragment was evaluated as a specific dna probe and used to design oligonucleotide primers for polymerase chain reaction (pcr) amplification. the nucleotide sequences adjacent to this dna fragment were determined by inverse pcr allowing the identification of a 4.1 kb sequence. analysis of this revealed a complete open reading frame (orf) with a h ... | 2004 | 15019113 |
| evaluation of randomly amplified polymorphic dna and pulsed field gel electrophoresis techniques for molecular typing of dermatophilus congolensis. | this study aimed to evaluate molecular typing methods useful for standardization of strains in experimental work on dermatophilosis. fifty dermatophilus congolensis isolates, collected from sheep, cattle, horse and a deer, were analyzed by randomly amplified polymorphic dna (rapd) method using twenty-one different primers, and the results were compared with those obtained by typing with a pulsed field gel electrophoresis (pfge) method using the restriction digest enzyme sse8387i. the typeability ... | 2004 | 15500984 |
| hplc quantification of two isomeric triterpenic acids isolated from mitracarpus scaber and antimicrobial activity on dermatophilus congolensis. | oleanolic (oa) and ursolic acids (ua) were isolated for the first time from the alcoholic extract of mitracarpus scaber possessing antimicrobial effects on dermatophilus congolensis. these two triterpenic acids were also active (mic 15 microg/ml) on this causative agent of dermatophilosis in african animals. to quantify oa and ua in m. scaber, a new, simple and rapid high-performance liquid chromatography (hplc) method compatible with ms detection was developed and validated. the mobile phase ac ... | 2005 | 16043321 |
| effects of severe chronic scrotal dermatophilus congolensis (kirchi) infection on semen characteristics in zebu/friesian crossbred bulls and effect of long-acting terramycin chemotherapy. | the semen characteristics of 12 zebu/friesian crossbred bulls, aged 2 to 3 years, were studied during a 21-month period. at the 12th month of the study, the commencement of the rainy season, the bulls were infected naturally with dermatophilus congolensis . lesions were scattered over the body and limbs, but were particularly pronounced on the scrotum. monthly treatments with injection of terramycin were begun as soon as lesions were detected and continued until the end of the study. the lesions ... | 1993 | 16727308 |
| renitelo cattle dermatophilosis and pcr-rflp analysis of mhc gene. | renitelo breed is a cattle breed created at kianjasoa station (madagascar) by a triple crossing malagasy zebu x limousine x afrikander. this breed besides many valuable advantages, such as rapid growth and drought power, presents a huge disadvantage which is sensitivity to skin disease, dermatophilosis, previously known as streptotrichosis. this disease caused by dermatophilus congolensis is one of the major threats for the population of renitelo cattle. an allele of mhc gene has been shown to b ... | 2006 | 17135556 |
| pustular dermatitis caused by dermatophilus congolensis. | we describe a case of pustular dermatitis in a 15-year-old girl who had just returned from horseback riding camp. based on gram staining, colony characteristics, biochemical reactions, and whole-cell fatty acid analysis, the causative agent was identified as dermatophilus congolensis. the literature contains few reports of human infection with this organism. | 2007 | 17376877 |
| fleece rot and dermatophilosis in sheep. | fleece rot and dermatophilosis reduce health and production of sheep and predispose them to blow fly strike. this paper reviews aetiology, prevalence, pathogenesis, resistance, attempts to develop vaccines and prospects for new control strategies to these important skin diseases. although the severity of fleece rot is associated with the abundance of pseudomonas aeruginosa on skin, microbial ecology studies are providing new insights into the contribution of other bacteria to the disease. wool t ... | 2008 | 18055136 |
| atypical dermatophilosis of sheep in kenya. | an outbreak of an atypical form of ovine dermatophilosis affecting the lips and muzzle with a very high morbidity in weaners and hoggets in kenya is reported. clinical diagnosis of ovine dermatophilosis was made and confirmed by direct microscopic examination as well as isolation and identification of dermatophilus congolensis from scab material from the affected sheep. the morbidity rate within the flock was 31.8% (237/745) with 98.3% (233/237) of the affected sheep being weaners and hoggets. n ... | 2007 | 18237045 |
| dermatophilus congolensis-associated placentitis, funisitis and abortion in a horse. | placentitis, funisitis and fetal bronchopneumonia were diagnosed in an aborted full-term thoroughbred fetus and its placenta by histopathological examination. dermatophilus congolensis organisms were isolated from placenta, lung and stomach content. the genotypic identification of aerobic culture was confirmed by sequential analysis of the entire 16s rdna gene. this is the first report of dermatophilus congolensis-associated abortion in any species. | 2008 | 18405341 |
| new approaches to detection and identification of rickettsia africae and ehrlichia ruminantium in amblyomma variegatum (acari: ixodidae) ticks from the caribbean. | imported from africa in the 1700s and despite frequent modern eradication efforts, amblyomma variegatum (f.) spread through the caribbean by cattle transport, small ruminants, and migrating birds. a. variegatum is a vector for rickettsia africae, the causative agent of african tick bite fever, and ehrlichia ruminantium, the causative agent of heartwater. we examined 95 a. variegatum and six rhipicephalus (boophilus) microplus (canestrini) collected from cattle at an abattoir in antigua. engorged ... | 2009 | 19645301 |
| atypical dermatophilus congolensis infection in a three-year-old pony. | dermatophilosis caused by dermatophilus congolensis causes exudative dermatitis in a variety of species. the infection is generally limited to the cutaneous tissues, where infection is acquired from the environment and bacteria penetrate into keratinized epithelium through epithelial disruption. a 3-year-old pony filly was examined for enlarging mandibular lymph nodes during the preceding 10 months. biopsy of the node revealed mixed and granulomatous inflammation and thick, filamentous gram-posi ... | 2010 | 20093705 |
| the treatment of bovine dermatophilosis and its effect on some haematological and blood chemical parameters. | in this study, the authors evaluated parenteral treatment of zebu cattle, with naturally and experimentally induced bovine dermatophilosis, in western sudan, using four different antibiotic treatments. in terms of recovery rate, weight gain, avoiding relapse and preventing death, gentamycin was found to be the most effective treatment, followed by a combination of penicillin and streptomycin and, finally, long-acting oxytetracycline. however, enrofloxacin was not successful. a significant improv ... | 2009 | 20462170 |