Bovine Aspergillosis Produced by the Inoculation of Conidiospores of <i>Aspergillus fumigatus</i> into a Mesenteric or Jugular Vein

Pathogenicity trials of Aspergillus f/awus (buffalo isolate) and A . fumigatus (human isolate) were carried out in buffalo calves by inoculating conidiospores intravenously and intratracheally in varying dosage. Haematological examination at weekly intervals revealed leucocytosis-(mainly due to neutrophilia) which usually reached the maximum at 3 weeks PI. Gross and microscopic lesions were mostly recorded in the kidneys, heart, 408-425.

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Fungi Associated with Bovine Abortion in the Northern Plains States (USA)

Knudtson

Kirkbride

1992

J VET Diagn Invest

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Abstract. Mycotic infection was diagnosed in 6.8% of 6,858 cases of bovine abortion and stillbirth examined during a 9-year period. Aspergilli were associated with approximately 5% of all abortion cases and 71% of 446 cases that were cultured for fungi and diagnosed as mycotic abortion. Aspergillusfumigatus was the most frequent isolate (62%), followed by A. terreus (6.7%), Emericella (Aspergillus) nidulans (3.0%), A. flaws (2.9%), and E. rugulosus (< 1.0%). Zygomycetes (Absidia, Mortierella, Rhizomucor, Rhizopus) accounted for 21% of the cases. Pseudallescheria boydii and yeasts (Candida, Torulopsis) were each identified in 2% of the cases. Fungi that uncommonly cause infection accounted for 2% of the cases and included CurvuZaria geniculata, Exophilia jeanselmei, Hendersonula toruloidea, Lecythosphora hoffmannii, Talaromyces jlavus var. flavus (Penicillium vermiculatus), T. (Penicillium) thermophilus, and WangieZZa dermatitidis. About 10% of the mycotic cases were mixed fungal infections involving A. fumigatus (87%), A. flavus (12.5%), or E. nidulans (12.5%) coexisting with Absidia corymbifera (72%), Rhizomucor pusillus (4.3%), or Rhizopus arrhizus (4.3%). In each mixed infection, both septate and nonseptate hyphae were observed in placental tissues. Twelve percent of the mycotic abortion cases were diagnosed by histologic examination alone because isolation attempts were negative or only formalinpreserved tissues were available.Mycotic placentitis is a major worldwide cause of abortion in cattle, generally occurring in the third trimester of pregnancy. 10,23,30 The disease is sporadic and rarely affects more than 1 or 2 animals in a herd. 2,12,134 In the Northern Hemisphere, the incidence of mycotic abortion is highest between November and April, which corresponds to the approximate time when gravid cows are housed indoors and fed hay and/or ensilage. 1,6,24 The disease can also occur in beef cattle confined to pens and fed hay as well as those on pasture. Furthermore, cows confined to sheds and fed in cubicals are at greater risk than those fed loose hay in an "open" barn.3,4,49 Previous reports indicated that > 60% of cases are caused by uncomplicated infection with Aspergillus fumigatus; zygomycetes (Absida, Mortierella, Rhizomucor, Rhizopus) accounted for about 20% of cases, and the remaining 20% were caused by a wide range of opportunistic filamentous fungi and yeasts.

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Bovine Aspergillosis Produced by the Inoculation of Conidiospores of Aspergillus fumigatus into a Mesenteric or Jugular Vein

Cited by 4 publications

References 6 publications

The occurrence of fungi in bovine tissues in relation to portals of entry and environmental factors

The occurrence of fungi in bovine tissues in relation to portals of entry and environmental factors

Experimental Aspergillosis in buffaloes: Histopathological, histochemical and serological studies

Fungi Associated with Bovine Abortion in the Northern Plains States (USA)

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