| toxoplasma gondii and coxiella burneti antibodies among brazilian slaughterhouse employees. | previous studies have indicated toxoplasmosis and q fever are potential hazards to persons who handle raw meat or who work in slaughterhouses. the prevalence of antibodies to t. gondii and c. burneti was studied among 144 employees of an abattoir in belo horizonte, brazil, to determine what environmental factors may be associated with the occurrence of these agents among persons who handle meat but who have not reported having toxoplasmosis or q fever. seventy-two per cent of the 144 employees w ... | 1975 | 1200023 |
| [geographic distribution of cysticercosis in cattle slaughtered in uberlandia, minas gerais]. | | 1986 | 3509350 |
| nematophagous fungi in fresh feces of cattle in the mata region of minas gerais state, brazil. | the capacity to survive gut passage is one of the desirable characteristics for nematophagous fungi to be considered potential biological control agents of gastrointestinal nematodes of livestock. from april 1995 to april 1996, a pool of 10 cow fecal samples and 10 individual samples of feces from heifers, which were raised under partial (cows) or total (heifers) confinement in the mata region of minas gerais state, brazil, were examined monthly for the presence of nematophagous fungi. a total o ... | 1999 | 10348101 |
| strategic control of gastrointestinal nematodes in dairy calves in florestal, minas gerais, brazil. | following epidemiological studies of gastrointestinal helminthiasis in dairy cattle in florestal county, minas gerais, 80 swiss and crossbred zebu x holstein calves, 8-10-months old, were selected to test the efficacy of three treatment protocols using ivermectin for helminth control. the calves were treated in brachiaria grass paddocks, naturally infected with haemonchus, cooperia, oesophagostomum and trichostrongylus species, and then divided into four groups of 20 animals each: group 1 was tr ... | 2000 | 10703752 |
| factors associated with the prevalence of malassezia species in the external ears of cattle from the state of minas gerais, brazil. | swabs collected from the external ears of 942 cattle, including both european and zebu breeds, were used to evaluate the epidemiology of malassezia species. high numbers of malassezia isolates were significantly associated with maturity of the animals and with diagnosed otitis. in healthy animals, a particularly low prevalence of the genus was found in holstein cows, especially in the summer months, a finding perhaps correlating with the open, air-exposed ears of this breed. pendutlous-eared zeb ... | 2003 | 12964846 |
| infection by neospora caninum associated with bovine herpesvirus 1 and bovine viral diarrhea virus in cattle from minas gerais state, brazil. | neospora caninum is a canine parasite which is considered a significant cause of bovine abortion. two cattle herd groups were serologically studied with the objective of studying the prevalence of infection by n. caninum associated with bhv1 and bvdv infections. in group i, 15 dairy herds (476 samples) naturally infected by the three infectious agents were analyzed,. in group ii, three dairy herds (100 samples) of cows vaccinated for two viruses were analyzed, in order to determine the infection ... | 2004 | 14746970 |
| genetic diversity and molecular phylogeny of anaplasma marginale isolates from minas gerais, brazil. | anaplasma marginale (rickettsiales: anaplasmataceae), a tick-borne pathogen of cattle, is endemic in tropical and subtropical regions of the world, and many isolates of a. marginale may occur in a given geographic area. phylogenetic relationships have been reported for a. marginale isolates from the us using gene and protein sequences of msp1a and msp4. these studies demonstrated that msp4 sequences, but not msp1a dna or protein sequences, provide phylogeographic information and also that msp1a ... | 2004 | 15135871 |
| detection of rickettsia rickettsii in the tick amblyomma cajennense in a new brazilian spotted fever-endemic area in the state of minas gerais. | the present study evaluated rickettsial infection in amblyomma spp. ticks collected in a farm in coronel pacheco, a brazilian spotted fever (bsf) endemic area. a total of 78 a. cajennense and 78 a. dubitatum free-living adult ticks were collected and tested by polymerase chain reaction (pcr) targeting a fragment of the rickettsial gene glta. only one pool of three a. cajennense ticks showed the expected product by pcr. this pool was further tested by pcr using sets of primers targeting the ricke ... | 2006 | 16444414 |
| distribution of antibodies against neospora caninum, bvdv and bhv-1 among cows in brazilian dairy herds with reproductive disorders. | neospora caninum, bovine viral diarrhea virus (bvdv) and bovine herpes virus 1 (bhv-1) are worldwide spread pathogens associated with reproductive problems in cattle. the present work aimed to observe the infection pattern of these three pathogens in two dairy herds with distinct reproductive managements from triângulo mineiro, minas gerais state, brazil. the herds were not vaccinated against either n. caninum, bvdv or bhv-1. blood samples were collected and analyzed for presence of specific ant ... | 2006 | 17196123 |
| infection rate of babesia spp. sporokinetes in engorged boophilus microplus from an area of enzootic stability in the state of minas gerais, brazil. | the infection rates of babesia sporokinetes in engorged boophilus microplus were evaluated during a 2-year period in a dairy farm located in an area of enzootic stability. every 14 days engorged females were collected from calves and from adult animals. ticks were incubated at 27 +/- 0.5 degree c and 80-90% relative humidity and babesia infection rates were determined by microscopic examination of giemsa-stained hemolymph smears. after 52 collections, 2105 ticks were obtained, from which 982 wer ... | 2004 | 15049079 |
| brazilian vaccinia virus strains are genetically divergent and differ from the lister vaccine strain. | vaccinia virus is responsible for an important zoonotic disease affecting dairy cattle and humans in brazil, but little is known about the origin, epidemiology and evolution of these brazilian vaccinia virus strains. in this work, seven brazilian vaccinia virus strains and the lister-derived brazilian vaccine strain, named lister-butantan, were compared based on the sequences of ten host range and virulence related genes. comparison of brazilian vaccinia virus strains with lister-butantan reveal ... | 2008 | 18248758 |
| diversity of virulence profiles of shiga toxin-producing escherichia coli serotypes in food-producing animals in brazil. | the prevalence, serotypes and virulence profiles of shiga toxin-producing escherichia coli (stec) were investigated in 205 healthy beef and dairy cattle, and 106 goats reared in the southeastern region of minas gerais state, brazil. the prevalence of stec was 57.5% (61/106) in goats, 39.2%, (40/102) in beef cattle and 17.5% (18/103) in dairy cattle. among the 514 stec isolates, 40 different serotypes were found and some of them were identified in a specific host. stec isolates harboring stx1 cor ... | 2008 | 18678426 |
| [frequency of anti-neospora caninum antibodies in cows and fetuses from municipalities of southern minas gerais]. | the objective of this study was to determine the frequency of antibodies anti-neospora caninum in cows and fetuses from municipalities of southern minas gerais. a total of 559 serum samples of cows of the a bank of sera formed from of serum samples collected at 18 dairy farms, distributed for seven municipalities of the lavras micro region, southern minas gerais, and 575 serum samples of cows and 503 serum samples of fetuses were collected at slaughter house of campo belo, mg. serum samples were ... | 2008 | 19265576 |
| occurrence of fasciola hepatica (linnaeus, 1758) infection in brazilian cattle of minas gerais, brazil. | fasciolosis is a parasitic disease which is caused by digenetic trematodes, such as fasciola hepatica, and which occurs worldwide. the disease causes significant economic losses in cattle because of the reduction in milk and meat production and because the parasitized livers have no economic value. also, abortion and mortality rates increase. to determine the occurrence and dispersal of f. hepatica in the state of minas gerais, fecal samples were collected from bovines aged 12 months and older b ... | 2009 | 19602313 |
| [cattle helminthiasis: farmers perception in minas gerais, brazil]. | this study aimed to characterize the cattle endoparasites control in minas gerais state. questionnaires were applied in 1,304 farms and 1,289 were validated and used in this study. the farms were located at 555 municipalities inserted in 66 minas gerais micro-regions and were selected by random sampling. the interviewees were asked about socioeconomic profile, production characteristics and cattle sanitary management of each farm, and attitudes to control the endoparasites. results showed that t ... | 2009 | 19772773 |
| short communication: detection of mycobacterium avium subspecies paratuberculosis by polymerase chain reaction in bovine milk in brazil. | mycobacterium avium ssp. paratuberculosis (map) is the causative agent of paratuberculosis, or johne's disease, a chronic granulomatous enteritis that affects all ruminants worldwide. since the isolation of map from intestinal tissue of human patients bearing crohn's disease, there has been a debate on the possibility of this agent playing a role in the etiology of crohn's disease. milk could be the potential vehicle for transmission to humans. mycobacterium avium ssp. paratuberculosis has alrea ... | 2009 | 19841202 |
| study of essential elements in cattle tissues from a tropical country using instrumental neutron activation analysis. | there has been increasing interest in the elemental composition of animal tissues to support health and nutritional studies. determining the elemental concentration in cattle tissues is especially important because these materials are used for multipurpose objectives such as the assessment of animal health, the quality of human foods consumed, and as a potential environmental biomonitor. chromium, copper, sodium, potassium, iron, and zinc levels were determined in bovine tissues--kidney, liver a ... | 2002 | 12362803 |
| genetic characterization of rabies virus isolated from bovines and equines between 2007 and 2008, in the states of são paulo and minas gerais. | rabies is an acute disease of the central nervous system and is responsible for the deaths of thousands of humans, wild animals and livestock, particularly cattle, as well as causing major economic losses. this study describes the genetic characterization of rabies virus variants that circulate in desmodus rotundus populations and are transmitted to herbivores. | 2010 | 20464137 |
| prevalence of neospora caninum antibodies in sheep flocks of uberlândia county, mg. | neosporosis is a parasitic disease that occurs in sheep and is associated with reproductive failure. the aim of this study was to verify seroprevalence of neospora caninum antibodies in 12 sheep flocks in uberlândia county, minas gerais, brazil, using indirect immunofluorescence assay (ifa). a total of 334 sheep blood samples were analyzed and an epidemiologic questionnaire was applied for each farm in order to correlate with risk factors of neosporosis: gender, age, breed, abortion problems, co ... | 2010 | 20943017 |
| ticks on birds in a forest fragment of brazilian cerrado (savanna) in the municipality of uberlândia, state of minas gerais, brazil. | this is a report of tick species, parasite prevalence and infestation intensity of birds in a forest fragment (18° 56' 57'' s and 48° 12' 14'' w) within the brazilian cerrado (savanna), in the municipality of uberlândia, state of minas gerais, brazil. a total of 162 birds from 26 species were captured. one adult tick, 296 larvae and 67 nymphs were found on passerine birds. of these, it was identified 31 larvae and 27 nymphs of amblyomma longirostre, 17 nymphs of a. nodosum, one a. cajennense lar ... | 2010 | 21184702 |
| aspects of the maintenance of the life cycle of fasciola hepatica in lymnaea columella in minas gerais, brazil. | fascioliasis is a parasitic disease of domestic ruminants that occurs worldwide. the lymnaeid intermediate hosts of fasciola hepatica include lymnaea columella, which is widely distributed in brazil. a colony of l. columella from belo horizonte, mg, was reared in our laboratory to be used in studies of the f. hepatica life cycle, the intermediate host-parasite relationship and development of an anti-helminthic vaccine. in the first experiment 1,180 snails were exposed to miracidia of f. hepatica ... | 2002 | 12048573 |
| feeding behavior of triatoma vitticeps (reduviidae: triatominae) in the state of minas gerais, brazil. | the objective of this study was to evaluate the feeding behavior of triatoma vitticeps through the identification of its food sources and the characterization of the blood ingestion process. in addition, we aimed to verify if the saliva of this vector interferes with the perception of the host during the feedings by creating a nervous impulse. here, we demonstrated that the t. vitticeps saliva reduces, gradually and irreversibly, the amplitude of the compound action potential of the nervous fibr ... | 2011 | 21340350 |
| prevalence of yeasts and mycelial fungi in bovine parasitic otitis in the state of minas gerais, brazil. | infestations by rhabditiform nematodes and acarids of the genus raillietia are considered the primary causes of external otitis in cattle in tropical regions. recently, yeasts of the genus malassezia have been associated with a relatively high percentage of otitis cases, but the occurrence of other yeasts and mycelial fungi has not yet been reported in the literature. this work studied the presence of fungi in the ear canal of 45 cattle with external parasitic otitis. the results were positive f ... | 2001 | 11708682 |
| epidemiological aspects of bovine parasitic otitis caused by rhabditis spp. and/or raillietia spp. in the state of minas gerais, brazil. | the occurrence of bovine external otitis in tropical regions is predominantly assigned to parasitic infections by rhabditiform nematodes and infestations by mites of the genus raillietia. this research had the purpose of investigating the prevalence of parasitic otitis in the dry and rainy seasons of minas gerais and correlating it with variables age, breed and the presence of horns. the secretion or cerumen of 981 cattle was collected with sterile swabs, placed in test tubes and exposed to sunl ... | 2001 | 11587832 |
| natural and human impacts on invertebrate communities in brazilian caves. | species richness, abundance, distribution and similarity between cave invertebrate communities were compared among seven caves located in the peruaçu river valley, north of minas gerais state, brazil. such comparisons aimed to determinate the degree of biological complexity in the sampled caves, calculated by the "index of biological complexity in caves", presented in this manuscript. the presence of potential or real impacts on the cave fauna was also investigated. a total of 1,468 individuals ... | 2001 | 11340457 |
| seasonal variation of boophilus microplus (canestrini, 1887) (acari: ixodidae) in cattle in minas gerais state, brazil. | the seasonal variation of the tick boophilus microplus in the 'região metalúrgica' region of minas gerais state was studied using 26 bos taurus (holstein) x bos indicus (gir) calves, of which 16 animals were 3/4 holstein x 1/4 gir and 10 were 3/4 gir x 1/4 holstein. monthly tick counts were made between march 1996 and march 1998 and, although b. microplus infestations occurred throughout the year, they were greater during the rainy season. rainfall was the climatic factor that most affected the ... | 2000 | 11147277 |
| neospora caninum in bovine fetuses of minas gerais, brazil: genetic characteristics of rdna. | neosporosis is an important cause of abortion in cattle and information on their genetics and host parasite relationships are desirable. neospora caninum samples obtained from 24 bovine fetuses from minas gerais, were genetically analyzed in part of the rdna region, coding for rrnas. previously, brain, heart, liver, skeletal muscle, lung, kidney, spleen, thymus, lymph nodes, ovary or testis, uterus and skin of the ear were analyzed by conventional histopathology and immunohistochemistry. of thes ... | 2011 | 22166381 |
| production of enterotoxins and toxic shock syndrome toxin by staphylococcus aureus isolated from bovine mastitis in brazil. | the production of toxic shock syndrome toxin 1 (tsst-1) and enterotoxins (se) a, b, c and d by bovine mastitis isolates of staphylococcus aureus was evaluated by immunodiffusion using the optimum-sensitivity plate method. s. aureus strains were isolated from bovine mastitis in 23 dairy herds in the state of minas gerais, brazil, during 1994-9. of 127 isolates, 83 (65.04%) produced one or several toxins, and among them production of se was found in 54 (43.0%) isolates, of which 1138 (29.09%) secr ... | 1999 | 10664976 |
| factors associated with seroprevalence of neospora caninum in dairy cattle in southeastern brazil. | neosporosis is an infectious disease caused by neospora caninum, an obligate intracellular cyst-forming protozoan considered a major cause of miscarriage in dairy cattle in many parts of the world. this cross-sectional study evaluated the relationship between reproductive abnormalities and seropositivity to n. caninum in 1,204 dairy cows from 40 farms located in the state of minas gerais, southeastern brazil. producers were interviewed, and blood samples were collected to perform indirect immuno ... | 2013 | 23212838 |
| quantification of vertical transmission of neospora caninum in dairy cows in minas gerais, brazil. | the objective of this cross-sectional study was to estimate the rate of vertical transmission and to investigate horizontal transmission of neospora caninum and occurrences of reproductive abnormalities in seropositive dairy cows on two farms in the state of minas gerais, brazil. the frequency of cows seropositive for n.caninum according to the indirect fluorescent antibody test (ifat) was 39.4% (93/236) for farm a and 31.4% (32/102) for the farm b (p > 0.05). the mean vertical transmission rate ... | 2012 | 23070443 |
| geographic variations in the composition of myotoxins from bothrops neuwiedi snake venoms: biochemical characterization and biological activity. | (1) venom pools from bothrops neuwiedi (bn) and from two subspecies, namely bothrops neuwiedi pauloensis (bnp) and bothrops neuwiedi urutu (bnu), collected in the states of são paulo (sp) and minas gerais (mg), brazil, were electrophoretically examined. basic toxins with different isoelectric points were identified in the venom collected in são paulo (bnsp). these toxins were absent in the corresponding pools from minas gerais (bnmg, bnpmg and bnumg). (2) bnsp, but not bnmg, bnpmg or bnumg, show ... | 1998 | 9972319 |
| succession and abundance of staphylinidae in cattle dung in uberlândia, brazil. | fimicolous staphylinidae prey on rearing dipterous in cattle dung, acting as their natural controllers, including pests such as horn fly. to survey the abundance and succession of these coleopterans in cattle dung deposited in pasture, six experiments were conducted from march to october 1995 in uberlândia, state of minas gerais, brazil. cattle dung pats were exposed at a pasture for 1 hr, 8 hr, 24 hr, 2, 3, 7 and 10 days and were than taken to laboratory separate from each other, for staphylini ... | 1998 | 9698856 |
| seasonal infection pattern of gastrointestinal nematodes of beef cattle in minas gerais state--brazil. | tracer calves were used to assess the seasonality of infections of gastrointestinal parasites in beef cattle extensively raised at a farm in the state of minas gerais, brazil. tracer calves acquired infections during all months of the year, however, highest worm burdens were observed in the rainy season. the following nematode species were recovered from tracer calves: cooperia punctata, c. spatulata, c. pectinata, haemonchus similis, h. placei, oesophagostomum radiatum, trichostrongylus colubri ... | 1998 | 9561708 |
| ultrastructure of anaplasma marginale with an inclusion appendage, isolated in minas gerais state, brazil. | this is the first report on the occurrence and isolation of a strain of anaplasma marginale with an inclusion appendage in brazil. the inclusion appendage presented longitudinal electron-dense striations and did not originate directly from the body of the rickettsia but from an electron-dense complex located at the junction of the inclusion membrane and inclusion appendage. the inclusion appendage remained in the host cell after the anaplasma inclusion appeared to be leaving the red blood cell. ... | 1997 | 9211652 |
| prevalence of antibodies to bluetongue, bovine herpesvirus 1 and bovine viral diarrhea/mucosal disease viruses in water buffaloes in minas gerais state, brazil. | a serological survey to detect water buffaloes with antibodies to bluetongue virus (btv), bovine herpesvirus 1 (bhv 1) and bovine viral diarrhea/mucosal disease virus (bvd/mdv) was performed in minas gerais state, brazil. precipitating antibodies against btv were detected by the agar gel immunodiffusion test (agid) in 54.4% of the serum samples tested. microplate serum-neutralization tests revealed that 14.7% and 52.7% of the water buffaloes had antibodies to bhv 1 and bvd/mdv, respectively. the ... | 1996 | 9091990 |
| rocky mountain spotted fever in an endemic area in minas gerais, brazil. | only one species of spotted fever-group rickettsiae that is pathogenic for humans has been isolated in brazil, where few physicians are familiar with this disease. in order to obtain information on tick-borne rickettsiosis, a study was performed in the county of santa cruz do escalvado, state of minas gerais, brazil, where a fatal clinical case confirmed by specific immunofluorescence had been reported. serum samples obtained from 679 humans and 96 dogs were tested by indirect immunofluorescence ... | 1994 | 8524052 |
| prevalence of cooperia punctata, c. pectinata and c. oncophora infections in dairy calves in brazil. | cooperia is the most prevalent helminth parasitizing calves in brazil. three species of this genus occur most often: c. punctata, c. pectinata and c. oncophora. six calves from dairy farms in the south of the state of minas gerais aged six to 15 months were killed and necropsied each month over a period of two years. the cooperia species were identified, counted, and the numbers related to the calves' age. the worm burdens due to the three species of cooperia were statistically different. c. pun ... | 1990 | 2283473 |
| prevalence of antibodies to selected viruses in bovine embryo donors and recipients from brazil, and its implications in international embryo trade. | the prevalence of serum antibody to enzootic bovine leukosis (ebl), blue-tongue (bt), bovine herpesvirus 1 (bhv 1) and bovine virus diarrhoea (bvd) viruses in bovine embryo donors (d) and recipients (r) from minas gerais state, brazil was investigated. of 451 sera (130 d plus 321 r) tested for antibodies against ebl virus 104 (23.1%) were positive. of 410 sera (130 d plus 280 r) tested for antibody to bt, bhv 1 and bvd viruses the respective number of positive sera were 313 (76.3%), 209 (51.0%) ... | 1992 | 1339004 |
| factors influencing the prevalence of clostridium perfringens type a in zebu beef cattle in the states of minas gerais and goias, brazil. | | 1978 | 225769 |
| [the relationship between larvae recovered of pasture and counting eggs per grams of feces (epg) of the gastrointestinal nematodes of cattle in the microrregion of viçosa, state of minas gerais]. | eight calves with one year old approximately, holstein-zebu cross-breeding, were stocked in paddock to analysis the relation between the eggs per grams of feces (epg) and larvae number recovered of pastures, from february to september 2005, at municipality of viçosa, zona da mata region, state of minas gerais, brazil. during this time, feces and pastures were collected for examination of epg and larvae recovered from pastures, respectively. the genera cooperia, haemonchus and oesophagostomum lar ... | 2007 | 17588320 |
| cloning, sequencing, expression, and antigenic characterization of rmsp4 from anaplasma marginale isolated from paraná state, brazil. | anaplasmosis is a bovine intraerythrocytic disease caused by the bacterium anaplasma marginale; it causes significant economic losses in tropical and subtropical regions, worldwide. the msp4 gene of an a. marginale strain isolated in paran , brazil, was amplified by pcr and sequenced; its cloning into the pet102/d-topo vector produced an msp4-6xhis-v5-hp thioredoxin fusion gene construct. this recombinant clone was over-expressed in escherichia coli bl21(de-3); the expressed fusion protein was f ... | 2007 | 17278086 |
| frequency of group a rotavirus in diarrhoeic calves in brazilian cattle herds, 1998-2002. | the frequency of group a bovine rotavirus (gpa brv) in calves from 1998 to 2002 was determined by the polyacrylamide gel electrophoresis technique in 2177 faecal samples, of which 1898 samples were diarrhoeic and 279 were of normal consistency (control group) that were collected from asymptomatic calves for comparative purposes. the animals were from beef and dairy cattle herds (n = 321) from 158 counties in seven states (paraná, são paulo, minas gerais, mato grosso do sul, mato grosso, goiás an ... | 2006 | 17265766 |
| environmental assessment of water-courses of the turvo limpo river basin at the minas gerais state, brazil. | a study was performed to evaluate the environmental contamination in the turvo limpo river basin which receives effluent discharges from domestic (residential and commercial) activities. the watercourses examined were the são bartolomeu stream, turvo sujo river, and turvo limpo river, located in the minas gerais state, brazil. water samples were collected at the river-side and analyzed for evaluation of pollutant inputs. the ph, temperature, electrical conductivity, redox potential (eh), dissolv ... | 2007 | 17058005 |
| metal pollution in the environment of minas gerais state - brazil. | intense mining activities in minas gerais state - brazil brings out tons of waste to the environment. considerable concentrations of toxic elements penetrate the soil, ground waters and rivers. this endangers the environment quality not only in the surrounding areas but also in ichthyofauna and in more distant areas of cattle raising and agricultural activities. after seasonal floods, veterinary clinic studies have shown that most animals raised in this region are affected by symptomatologic ner ... | 2006 | 16917705 |
| coagulase gene typing of staphylococcus aureus isolated from cows with mastitis in southeastern brazil. | a typing procedure based on polymorphism of the coagulase gene (coa) was used to discriminate staphylococcus aureus isolated from minas gerais dairy cows with mastitis. amplification of the gene from the 64 s. aureus isolates produced 27 different polymerase chain reaction (pcr) products; 60 isolates showed only 1 amplicon, and 4 showed 2 amplicons. the isolates were grouped into 49 types by analyzing the restriction fragment length polymorphism (rflp) of the coa gene; the 10 most common types a ... | 2005 | 16479723 |
| distribution and schistosoma mansoni infection of biomphalaria glabrata in different habitats in a rural area in the jequitinhonha valley, minas gerais, brazil: environmental and epidemiological aspects. | this paper examines the distribution and infection of biomphalaria glabrata with schistosoma mansoni in all aquatic snail habitats in a rural area in the state of minas gerais, brazil, in relation to physico/biotic and behavioral factors. snail and environmental surveys were carried out semi-annually between july 2001 and november 2002 at 106 sites. collected snails were examined in the laboratory for infection. b. glabrata densities were highest in overflow ponds, irrigation ponds, springs, can ... | 2004 | 15654420 |
| evaluation of the prophylactic effect and curative efficacy of fipronil 1% pour on (topline) on post-castration scrotal myiasis caused by cochliomyia hominivorax in cattle. | a field trial was carried out during a summer-fall period on a commercial beef cattle farm in minas gerais state, located in the southeast of brazil. in order to evaluate the prophylactic effect and the curative efficacy of fipronil in a 1% solution, 200 zebu crossbred bulls, with ages varying from 20 to 30 months and weights from 233 to 362 kg, were selected. the bulls were assigned by ranked pair to an untreated control group (a) or to a treated group (b), resulting in 100 animals per group. a ... | 2004 | 15482893 |
| epidemiologic aspects of an outbreak of trypanosoma vivax in a dairy cattle herd in minas gerais state, brazil. | the aim of this study was to assess the epidemiological situation of bovine trypanosomiasis caused by trypanosoma vivax in a dairy cattle herd from igarapé, minas gerais state, brazil. the herd was monitored from september 2007 to february 2009 by sampling blood for determination of packed cell volume (pcv), microhaematocrit centrifugation test of parasitaemia (mhct), serology (ifa), morphological identification of t. vivax and molecular diagnosis by polymerase chain reaction (pcr). during all t ... | 2010 | 20138431 |
| toxigenic status of staphylococcus aureus isolated from bovine raw milk and minas frescal cheese in brazil. | a group of 291 staphylococcus aureus isolates from mastitic cow's milk (n = 125), bulk tank milk (n = 96), and minas frescal cheese (n = 70) were screened for staphylococcal enterotoxin (se) genes (sea, seb, sec, sed, see, seg, seh, sei, selj, and sell) and for the tst-1 gene encoding staphylococcal toxic shock syndrome toxin 1 by pcr assay. a total of 109 (37.5%) of the isolates were positive for at least one of these 11 genes, and 23 distinct genotypes of toxin genes were observed. of the s. a ... | 2010 | 21219740 |
| strategic control of cattle ticks: milk producers' perceptions. | in order to evaluate milk producers' knowledge about tests on tick sensitivity to acaricides, efficiency tests and strategic control, questionnaires were delivered to 670 producers. from these, 163 responses were received. these producers had sent ingurgitated female ticks to be subjected to tests on tick sensitivity to acaricides at embrapa between 2001 and 2005. most of the completed questionnaires came from the state of minas gerais, brazil. after descriptive analysis and correlation of varia ... | 2011 | 21722490 |
| anthelmintic resistance in a dairy cattle farm in the state of minas gerais. | eighty-four half-blood gir +ù holstein (f1) calves aged six months who were naturally infected by gastrointestinal helminths and maintained in rotational grazing received different anthelmintic treatments. group a received anthelmintics according to the usual management in the property (eight treatments, seven including a macrocyclic lactone agent). group b received strategic treatment (ivermectin 3.15%) at the beginning and at the end of the rainy period. eggs per gram of feces (epg) counts and ... | 2011 | 21722485 |
| Perceptions of milk producers from Divinópolis, Minas Gerais, regarding Rhipicephalus (Boophilus) microplus control. | Semi-systematized interviews were conducted with 100 dairy cattle producers in the municipality of Divinópolis, Minas Gerais, with the aim of ascertaining their perceptions regarding the importance of Rhipicephalus (Boophilus) microplus and of combating it. Content analysis was performed and the frequency distribution of each of the variables was used to construct profiles of the producers interviewed. The production losses caused by ticks were perceived incompletely by the producers, who were u ... | 2011 | 22166383 |
| Perceptions and attitudes among milk producers in Minas Gerais regarding cattle tick biology and control. | This study evaluates milk producers' knowledge regarding cattle ticks and practices for controlling them. Ninety-three dairymen in Minas Gerais were interviewed. These producers had no information regarding acaricide efficiency tests. To analyze the information, open responses were categorized through "content analysis", and descriptive analysis consisting of extracting the profile highlighted by the highest frequencies. The association between schooling level and knowledge was tested by means o ... | 2011 | 21961747 |
| Frequency of species of Eimeria in females of the holstein-friesian breed at the post-weaning stage during autumn and winter. | The frequency of species of the genus Eimeria in a dairy herd in the municipality of Boa Esperança, Southern region of the State of Minas Gerais was assessed. From 37 females of the Friesian breed aged three to seven months, 259 feces samples were analyzed between May and September 2008. The examinations to quantify oocysts per gram of feces (OPG) and identify Eimeria species were conducted at the Veterinary Parasitology Laboratory of the Federal University of Lavras. Eleven species of Eimeria w ... | 2011 | 22166384 |
| estimates of genetic parameters for stayability and their associations with traits of economic interest in gir dairy cows. | the objective of the present study was to estimate genetic parameters for stayability at 60 months of age (stay60) and its association with first lactation cumulative milk yield (p305), age at first calving (afc), and first calving interval (fci), in order to adopt these traits as selection criteria for longevity in gir dairy cattle. records for 2770 cows born between 1982 and 2008 from six herds in the brazilian states of minas gerais, são paulo, and paraíba were analyzed. the (co)variance comp ... | 2016 | 26909978 |
| concentration of mycotoxins and chemical composition of corn silage: a farm survey using infrared thermography. | this work evaluated the chemical composition and mycotoxin incidence in corn silage from 5 brazilian dairy-producing regions: castro, in central-eastern paraná state (n=32); toledo, in southwestern paraná (n=20); southeastern goiás (n=14); southern minas gerais (n=23); and western santa catarina (n=20). on each dairy farm, an infrared thermography camera was used to identify 3 sampling sites that exhibited the highest temperature, a moderate temperature, and the lowest temperature on the silo fa ... | 2015 | 26162792 |
| technical note: validation of a system for monitoring individual feeding behavior and individual feed intake in dairy cattle. | the objective of this study was to validate an electronic system for monitoring individual feeding behavior and feed intake (intergado ltd., contagem, minas gerais, brazil) in freestall-housed dairy cattle. no data have been published that validate either the behavioral measurement or the feed intake of this system. feeding behavior data were recorded for 12 holstein cows over 5d using an intergado system and time-lapse video. the cows were fitted with an ear tag containing a unique passive tran ... | 2015 | 25771061 |
| antimicrobial-resistance genetic markers in potentially pathogenic gram positive cocci isolated from brazilian soft cheese. | although most brazilian dairy products meet high technological standards, there are quality issues regarding milk production, which may reduce the final product quality. several microbial species may contaminate milk during manufacture and handling. if antimicrobial usage remains uncontrolled in dairy cattle, the horizontal transfer of antimicrobial resistance genes in foodstuffs may be of particular concern for both food producers and dairy industry. this study focused on the evaluation of puta ... | 2018 | 29337343 |