| bovine mastitis in ontario due to mycoplasma agalactiae subsp. bovis. | bovine mastitis caused by mycoplasma agalactiae subsp. bovis was first diagnosed in 16 of 55 cows in an ontario herd in feburary 1972. a total of 182 of 598 (30.4%) cows from 33 of 64 (51.5%) farms in widely separated areas of the province were culturally positive. herd incidence varied from 15 to 40% with one closed herd having an incidence of 61%. four herds were investigated culturally and serologically by the growth inhibition test for 15 months. in the acute phase the organism was present i ... | 1976 | 1000385 |
| the recovery of mycoplasmas from the genital tracts of bulls in artificial breeding units in ontarïo. | one hundred and thirty-two penial-preputial swabbings, 140 raw and 42 processed semen samples were cultured for mycoplasmas. mycoplasma or acholeplasma were recovered from 87, 32 and one respectively, while ureaplasmas were recovered from 46, 34 and six respectively. | 1975 | 1175080 |
| the frequency, distribution and effects of antibodies, to seven putative respiratory pathogens, on respiratory disease and weight gain in feedlot calves in ontario. | during 1983-85, 279 calves requiring treatment for bovine respiratory disease and 290 comparison (control) animals from 15 different groups of feedlot calves were bled on arrival and again at 28 days postarrival. their sera were then analyzed for antibodies to seven putative respiratory pathogens. on arrival, the prevalences of indirect agglutination titers to pasteurella haemolytica, p. haemolytica cytotoxin, mycoplasma bovis and m. dispar were greater than 50%, the prevalence of titers to bovi ... | 1989 | 2766158 |
| experimental studies on the pathogenicity of mycoplasma ovipneumoniae and mycoplasma arginini for the respiratory tract of goats. | mycoplasma ovipneumoniae and mycoplasma arginini were the species of mollicutes most commonly isolated from 175 goats with respiratory disease in ontario. the pathogenicity of m. ovipneumoniae, strain b321b and m. arginini, strain d53e, was assessed in goats following endobronchial inoculation. one out of three two year old goats developed fever after inoculation with a pure culture of strain b321b, and it had extensive subacute fibrinous pleuritis when necropsied three weeks later. neither of t ... | 1986 | 3742358 |
| virology in a general hospital. | | 1968 | 4297376 |
| a new subtype of type a influenzavirus isolated from turkeys. | a new subtype of avian influenzavirus a was isolated in january 1967 from an epizootic in a turkey hatchery in ontario, canada. the disease was fatal in 65 of 2 500 hens involved. virus was isolated from lung and trachea tissue of three dead turkeys. sera from convalescent birds contained antibody against the viruses isolated from the outbreak but not against other known type a avian influenzaviruses, newcastle disease virus, myxovirus yucaipa, or mycoplasma gallisepticum.the strain designated a ... | 1972 | 4541004 |
| acute cerebellar ataxia and concomitant infection with mycoplasma pneumoniae. | | 1972 | 5060461 |
| susceptibility of goats and calves after experimental inoculation or contact exposure to a canadian strain of mycoplasma mycoides subsp. mycoides isolated from a goat. | transmissibility of mycoplasma mycoides subsp. mycoides infection from experimentally inoculated goats to other goats and calves was studied. eight goats and six calves were housed in an 18 m2 room. six of the goats were inoculated endobronchially with strain d44 isolated from a natural case of polyarthritis in ontario. these six goats died within a week of mycoplasma septicemia. the two contact goats or the six calves never showed signs of disease and m. mycoides subsp. mycoides was not recover ... | 1983 | 6365296 |
| a new legionella species, legionella feeleii species nova, causes pontiac fever in an automobile plant. | from 15 to 21 august 1981, pontiac fever affected 317 automobile assembly plant workers. results of serologic tests were negative for mycoplasma, chlamydia, respiratory tract viruses, and previously described legionellae. a gram-negative, rod-shaped organism (wo-44c) that did not grow on blood agar, required l-cysteine for growth, and contained large amounts of branched-chain fatty acids was isolated from a water-based coolant. the organism did not react with antisera against other legionellae, ... | 1984 | 6696354 |
| epidemiology of haemophilus pleuropneumoniae infection in pigs: a survey of ontario pork producers, 1981. | information about factors associated with the spread and the effect of pleuropneumonia was obtained from 418 pork producers in ontario, who returned a mailed questionnaire. the overall herd prevalence of pleuropneumonia was 23.2%. the prevalence among herds with feeder pigs only was 34.3% and 16% among sow herds. the chance of pleuropneumonia breaking out in a herd was increased with increased traffic of pigs into the herd. the source of supplementary stock had an important effect on the chance ... | 1983 | 6831302 |
| porcine haemophilus pleuropneumonia epizootic in southwestern ontario: clinical, microbiological, pathological and some epidemiological findings. | a fibrinous necrotizing pleuropneumonia with a predominant mononuclear cell infiltrate commenced january 1978. the pneumonia, caused by haemophilus pleuropneumoniae assumed epizootic proportions and affected mainly feeder pigs in the intensive pig rearing area of southwestern ontario. a few abortions occurred. winter storms, recent transportation and other potentially stressful situations were associated with herd outbreaks. broad spectrum antibiotics were usually effective in stopping deaths. | 1981 | 7272838 |
| the association of titers to haemophilus somnus, and other putative pathogens, with the occurrence of bovine respiratory disease and weight gain in feedlot calves. | serum samples were obtained from 602 calves (from 19 groups in four feedlots: three in ontario, and one in alberta) upon arrival at the feedlot and 28 d later. of these calves, 202 developed bovine respiratory disease (brd) and 400 did not develop brd. based on high antibody titers noted upon arrival, we infer that most calves were exposed to haemophilus somnus prior to arrival at the feedlot. within a group, calves with high titers on arrival had a reduced risk of developing brd later. most cal ... | 1998 | 9798091 |
| two nursing home outbreaks of respiratory infection with legionella sainthelensi. | to describe outbreaks of infection caused by legionella sainthelensi occurring in older residents of two nursing homes and to determine risk factors for the development of infection. | 1999 | 10323647 |
| enteroviral syndromes in toronto, 1964. | virological or serological investigations of 72 children in toronto and environs, who were hospitalized between january and october 1964 with a variety of syndromes, revealed evidence of enteroviral infection in 29 subjects. coxsackie b2 was the dominant enterovirus, being isolated from feces and/or cerebrospinal fluid (csf) of three children with aseptic meningitis, three with pleurodynia, one with myalgia and one with pericarditis; four additional patients showed rising antibody titres to this ... | 1965 | 14269435 |
| diseases and pathogens associated with mortality in ontario beef feedlots. | this study determined the prevalence of diseases and pathogens associated with mortality or severe morbidity in 72 ontario beef feedlots in calves that died or were euthanized within 60 days after arrival. routine pathologic and microbiologic investigations, as well as immunohistochemical staining for detection of bovine viral diarrhea virus (bvdv) antigen, were performed on 99 calves that died or were euthanized within 60 days after arrival. major disease conditions identified included fibrinos ... | 2006 | 16566254 |
| the prevalence of bartonella, hemoplasma, and rickettsia felis infections in domestic cats and in cat fleas in ontario. | the prevalence of persistent bacteremic bartonella spp. and hemoplasma infections was determined in healthy pet cats in ontario. blood samples from healthy cats sent to a diagnostic laboratory for routine health assessment over the course of 1 y were tested for bartonella spp. using both polymerase chain reaction (pcr) and blood culture, and for the presence of hemoplasma by pcr. the overall prevalence of bartonella spp. by pcr and by culture combined was 4.3% (28/646) [3.7% (24/646) bartonella ... | 2008 | 19086373 |
| etiology of acute childhood encephalitis at the hospital for sick children, toronto, 1994-1995. | of 145 patients admitted to our hospital because of encephalitis-like illness, 50 patients hospitalized for > or =72 hours underwent standardized microbiological investigations. a confirmed or probable etiologic agent was identified in 20 cases (40%), including mycoplasma pneumoniae (9 cases). m. pneumoniae and enterovirus (2), herpes simplex virus (4), epstein-barr virus (1), human herpes-virus 6 (hhv-6) (1), hhv-6 and influenza virus type a (1), influenza virus type a (1), and powassan virus ( ... | 1998 | 9502462 |
| eperythrozoonosis in sheep. | | 1996 | 9111697 |
| infectious agents in acute respiratory disease in horses in ontario. | a study of acute respiratory disease in horses in ontario was undertaken to determine the identity of current causative infectious agents. a nasopharyngeal swab was designed and utilized to maximize isolation of viruses, mycoplasma, and pathogenic bacteria. serum samples were collected for parallel determination of antibody titers to equine influenza virus type a subtype 1 (h7n7) and subtype 2 (h3n8), equine rhinovirus types 1 and 2, equine herpesvirus type 1, mycoplasma equirhinius, and mycopla ... | 1997 | 9087920 |
| isolation of mycoplasma pneumoniae from respiratory tract specimens in ontario. | | 1987 | 3109723 |
| mycoplasma pneumoniae infections in a rural setting in canada. | mycoplasma pneumoniae infection was monitored in patients with symptoms of acute respiratory tract infection in a village in southeastern ontario from april 1983 to april 1984. m. pneumoniae was isolated from 51 (48%) of the 106 patients. the incidence began to increase in may 1983, reached a peak in july and declined to normal by mid-august. during the epidemic period m. pneumoniae was detected in 36 of the 43 symptomatic patients. the most prominent features of the outbreak were the considerab ... | 1987 | 3107790 |