Observations on Septicemia of Cattle Caused by a <i>Haemophilus</i>-Like Organism

Panciera, Roger J.; Dahlgren, Robert R.; Rinker, Harold B.

doi:10.1177/030098586800500303

Cited by 22 publications

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“…The BE1 possesses many taxonomic characteristics in common with members of the genus Haemophilus (11, 16, 2 5 ) and, in addition, has a DNA base composition within 1% of the value obtained for H. influenzae. Because this microotganism is associated with specific (1, 6,7,12,16,20,27) disease entities of cattle and has been referred t o only in the vernacular, it would be highly desirable to propose a scientific name for it. The microorganism has been referred to as Haemophilus somnus (6,7 ) , as proposed by one of us (W. E. B., Ph.D. thesis), but this name has not been validly published.…”

Section: Identified As Pasteurella Bovisepticamentioning

confidence: 99%

“…In 1956, a previously undescribed encepha-and Oklahoma (20). The microorganism has litic condition of cattle termed "infectious been referred to as a Haemophilus-like organism embolic meningoencephalitis" was reported (20,25), Haemophilus somnus ( 6 , 7), an from Colorado ( 12).…”

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confidence: 99%

“…The microorganism has litic condition of cattle termed "infectious been referred to as a Haemophilus-like organism embolic meningoencephalitis" was reported (20,25), Haemophilus somnus ( 6 , 7), an from Colorado ( 12). The primary encephalitic Actinohacilhs actinoides-like organism ( 1 ), and lesion was cerebral infarction.…”

mentioning

confidence: 99%

“…Experimental characterized by thrombosis of blood vessels, reproduction of lesions resembling those seen in hemorrhage, necrosis of brain tissue, and field cases of the disease has been reported by subsequent septic infection of the affected area. inoculation of suspensions of the microorgaStreptococci and corynebacteria were isolated nism into susceptible calves (1,7,16,20). from several specimens and thought to be During the course of a survey designed to reliable cultures.…”

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confidence: 99%

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Deoxyribonucleic Acid Characterization of a Microorganism Isolated from Infectious Thromboembolic Meningoencephalomyelitis of Cattle

Bailie¹,

Coles²,

Weide³

1973

International Journal of Systematic Bacteriology

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Deoxyribonucleic acids (DNAs) from an unnamed species of microorganism (bovine encephalitis isolate) previously placed in the family Brucellaceae and from representative species of this family were thermally denatured t o determine mole percentages of guanine plus cytosine (mol %G+C). The results established that DNA from the bovine encephalitis isolate, had a mol %G+C of 37.3 * 0.2, which was between values for Haemophilus influenzae and Francisella tularensis. Values for mol %G+C of the other microorganisms in this family agreed with previously reported data. A heterogenous group of microorganisms composed of six different overlapping genera and the BE1 were in the range of 3 3 t o 46 mol %G+C. Because the mol %G+C of the genera in this group did not differ statistically, the proper taxonomic position of recognized members of the family Brucellaceae was questioned.

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Section: Identified As Pasteurella Bovisepticamentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Deoxyribonucleic Acid Characterization of a Microorganism Isolated from Infectious Thromboembolic Meningoencephalomyelitis of Cattle

Bailie¹,

Coles²,

Weide³

1973

International Journal of Systematic Bacteriology

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“…12, 16,* ' The lung lesions reported are fibrinous p n e~m o n i a ,~'~ fibrinous pleuritiS,4,7. 13.21 suppurative b r o n c h o p n e u m~n i a ,~?~~~,~,~* I I *…”

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confidence: 99%

Microscopic Lesions Associated with the Isolation of Haemophilus somnus from Pneumonic Bovine Lungs

et al. 1985

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Abstract. Sixty-one of 68 sets of bovine lungs from which only Haemophilus somnus was isolated had microscopic lesions of purulent bronchiolitis and bronchopneumonia. In 37 of 6 1 lungs, the bronchiolar exudates were markedly necrotic with accompanying necrosis of the adjacent bronchiolar epithelium. Bronchiolitis obliterans was prominent in 23 of 28 lungs affected with chronic lesions with abscesses present in seven. Alveolar filling with inflammatory cells (neutrophils with fewer macrophages) was limited to peribronchiolar alveoli in 25 of 6 1 lungs and was multifocal to diffuse in the other 36. Lesions in the remaining lungs (7 of 68) were classified as fibrinous pneumonia with bronchiolitis (2), fibrinous pleuritis (2), suppurative interstitial pneumonia with vasculitis (2), and diffuse congestion ( 1). 30, 1983, all submissions of bovine tissues to the Iowa State University Veterinary Diagnostic Laboratory from which Haemophilus somnus was isolated were selected for review. In addition, 25 bovine submissions from which only Pasteurella hemolytica was isolated from pneumonic lung tissue were included in the review for comparison. Whenever parafin-embedded lung tissue was available, 6 pm sections were cut, mounted on glass slides, and stained with hematoxylin and eosin (HE) by standard methods. Lung tissues for histologic examination were selected from pneumonic cranial ventral lobes, and in a few cases, additional lung tissue was selected from less affected or nonaffected caudal lobes. Each lung section was examined, and histologic changes were described and subsequently classified according to the major lesions. Lung is used throughout to mean one or both lungs from a single animal.The decision to attempt demonstration or isolation of other microbial agents was made by the diagnostician in charge of the submitted sample based on the referring veterinarian's request, the samples and their condition, and the available examination procedures. Therefore, all samples were not subjected to identical microbiologic procedures. Bacteriologic isolation attempts were the most standardized and were done on all lungs. All fresh lungs were swabbed with sterile cottontipped swabs, and these swabs were plated on unsupplemented 5% bovine blood agar and brain heart infusion agar supplemented with 10% bovine whole blood and 0.5% yeast extract. Inoculated 5% bovine blood agar plates were incubated at 37°C for 24 to 48 hours in normal atmosphere and duplicate plates were incubated in reduced oxygen environments. The inoculated brain heart infusion agar plates were incubated in moist chambers containing 10% CO, at 37°C for a minimum of 48 hours. Bacterial identification was done by standard procedures.Attempts to demonstrate the presence of viral and mycoplasma1 agents was by direct fluorescent antibody examination of sections of frozen lung or other appropriate tissues for infectious bovine rhinotracheitis and bovine virus diarrhea viruses and for Mycoplasma bovis and Mycoplasma dispar or by inoculation of susceptible cell cul...

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Histophilosis as a Natural Disease

O’Toole

Sondgeroth

2015

Current Topics in Microbiology and Immunology

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Histophilus somni is responsible for sporadic disease worldwide in cattle and, to a lesser extent, in small ruminants, bighorn sheep (Ovis canadensis), and North American bison (Bison bison). The importance of H. somni diseases can be attributed to improved clinical and laboratory recognition, combined with the growth in intensive management practices for cattle. Although outbreaks of bovine histophilosis can occur year-round, in northern and southern hemispheres, it is most frequent in late fall and early winter. Weather, stress, dietary changes, and comingling of cattle are likely to be major triggers for outbreaks. The most frequent clinical expressions of histophilosis include undifferentiated fever, fibrinosuppurative pneumonia, encephalitis-leptomeningitis, necrotizing myocarditis, and diffuse pleuritis. Neurological disease occurs either as thrombotic meningoencephalitis (TME) or as suppurative meningitis with ventriculitis. Acute myocarditis is characteristically necrotizing and generally involves one or both papillary muscles in the left ventricular myocardium. Biofilm-like aggregates of bacteria occur in capillaries and veins in myocardium, in the central nervous system, and on endocardial surfaces. H. somni is a component of bovine respiratory disease (BRD) complex. In our experience, it is most commonly diagnosed in subacute-to-chronic polymicrobial pulmonary infections in combination with Mannheimia haemolytica, Trueperella pyogenes, Pasteurella multocida, or Mycoplasma bovis. Other, less common forms of H. somni disease present as polyarthritis/tenosynovitis, abortion with placentitis and fetal septicemia, epididymitis-orchitis, and ocular infections. It is likely that H. somni is under-recognized clinically and diagnostically. Most state and provincial laboratories in North America rely on bacterial isolation to confirm infection. The use of more sensitive detection methods on field cases of histophilosis will help resolve the pathogenesis of H. somni in natural outbreaks, and whether the disease is as common elsewhere as it is in Canada.

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Observations on Septicemia of Cattle Caused by a Haemophilus-Like Organism

Cited by 22 publications

References 0 publications

Deoxyribonucleic Acid Characterization of a Microorganism Isolated from Infectious Thromboembolic Meningoencephalomyelitis of Cattle

Deoxyribonucleic Acid Characterization of a Microorganism Isolated from Infectious Thromboembolic Meningoencephalomyelitis of Cattle

Microscopic Lesions Associated with the Isolation of Haemophilus somnus from Pneumonic Bovine Lungs

Histophilosis as a Natural Disease

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