scholarly journals Differential house finch leukocyte profiles during experimental infection with Mycoplasma gallisepticum isolates of varying virulence

2020 ◽  
Vol 49 (4) ◽  
pp. 342-354
Author(s):  
Natalie M. Bale ◽  
Ariel E. Leon ◽  
Dana M. Hawley
Keyword(s):  
Experimental Infection ◽  
Mycoplasma Gallisepticum ◽  
House Finch ◽  
Leukocyte Profiles

scholarly journals Dynamics of Conjunctivitis and Mycoplasma Gallisepticum Infections in House Finches

The Auk ◽  
2001 ◽  
Vol 118 (2) ◽  
pp. 327-333 ◽  
Author(s):  
Barry K. Hartup ◽  
Jean M. Bickal ◽  
Andre A. Dhondt ◽  
David H. Ley ◽  
George V. Kollias
Keyword(s):  
Breeding Season ◽  
Annual Variation ◽  
Seasonal Fluctuation ◽  
Host Density ◽  
Mycoplasma Gallisepticum ◽  
Disease Prevalence ◽  
Significant Decline ◽  
Carpodacus Mexicanus ◽  
House Finch ◽  
House Finches

Abstract Conjunctivitis, an infectious disease caused by Mycoplasma gallisepticum (MG), has produced a significant decline in eastern House Finches (Carpodacus mexicanus) of North America. In this paper, we present findings from two complementary studies designed to clarify annual and seasonal trends of MG infections in House Finches from the northeastern United States. The first was a field study of House Finches common to urban and residential habitat from Mercer County, New Jersey. We documented conjunctivitis in 11% (188/1,651) of the birds examined. Conjunctivitis prevalence in House Finches ranged from 0 to 43% per month, and exhibited marked seasonal fluctuation (elevations during fall and winter months and lower disease prevalence during the breeding season). There was excellent intermethod agreement on disease prevalence when measured by either presence of physical signs (conjunctivitis) or MG infection (kappa = 0.75). During the peak of the breeding season (April through June), conjunctivitis was present in a greater proportion of males lacking a cloacal protuberance than males with a cloacal protuberance (P < 0.01), but was similar between breeding and nonbreeding females. The second study, a volunteer survey, revealed the proportion of northeastern U.S. monitoring sites with at least one diseased House Finch each month ranged from a peak of 59% (August 1995) to a minimum of 12% (July 1999). Subsequent to the epidemic peak of disease in 1995, a series of recurring cycles occurred, with elevations in those proportions noted in late fall and winter and minima during the breeding season. Mycoplasmal conjunctivitis now appears endemic among House Finches of that region and demonstrates dynamics consistent with annual variation in host density.

Comparison of Experimental Infection of Normal and Immunosuppressed Chickens with Mycoplasma gallisepticum

2020 ◽  
Vol 175 ◽  
pp. 5-12 ◽  
Author(s):  
J. Bao ◽  
Z. Wu ◽  
M. Ishfaq ◽  
Y. Miao ◽  
R. Li ◽  
...  
Keyword(s):  
Experimental Infection ◽  
Mycoplasma Gallisepticum

scholarly journals Differing House Finch Cytokine Expression Responses to Original and Evolved Isolates of Mycoplasma gallisepticum

2018 ◽  
Vol 9 ◽  
Author(s):  
Michal Vinkler ◽  
Ariel E. Leon ◽  
Laila Kirkpatrick ◽  
Rami A. Dalloul ◽  
Dana M. Hawley
Keyword(s):  
Mycoplasma Gallisepticum ◽  
Cytokine Expression ◽  
House Finch

Experimental Infection of Ducks with Mycoplasma gallisepticum

1983 ◽  
Vol 27 (2) ◽  
pp. 405 ◽  
Author(s):  
S. Yamada ◽  
K. Matsuo
Keyword(s):  
Experimental Infection ◽  
Mycoplasma Gallisepticum

scholarly journals EXPERIMENTAL INFECTION OF HOUSE FINCHES WITH MYCOPLASMA GALLISEPTICUM

2004 ◽  
Vol 40 (1) ◽  
pp. 79-86 ◽  
Author(s):  
George V. Kollias ◽  
Keila V. Sydenstricker ◽  
Heidi W. Kollias ◽  
David H. Ley ◽  
Parviez R. Hosseini ◽  
...  
Keyword(s):  
Experimental Infection ◽  
Mycoplasma Gallisepticum ◽  
House Finches

scholarly journals Mycoplasma gallisepticum infection dynamics in a house finch population: seasonal variation in survival, encounter and transmission rate

2004 ◽  
Vol 73 (4) ◽  
pp. 651-669 ◽  
Author(s):  
Cristina R. Faustino ◽  
Christopher S. Jennelle ◽  
Veronique Connolly ◽  
Andrew K. Davis ◽  
Elliott C. Swarthout ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Transmission Rate ◽  
Mycoplasma Gallisepticum ◽  
House Finch ◽  
Infection Dynamics

Effect Of Mixed Experimental Infection With Gallibacterium Anatis And Mycoplasma Gallisepticum on Performance Of Broiler Chickens

2018 ◽  
Vol 59 (1) ◽  
pp. 87 ◽  
Author(s):  
Hatem ElHamid ◽  
Hany Ellakany ◽  
Ahmed Bekhit ◽  
Ahmed Elbestawy ◽  
Mahmoud Elshafey
Keyword(s):  
Experimental Infection ◽  
Broiler Chickens ◽  
Mycoplasma Gallisepticum

scholarly journals Attenuated Phenotype of a Recent House Finch-Associated Mycoplasma gallisepticum Isolate in Domestic Poultry

2017 ◽  
Vol 85 (6) ◽  
Author(s):  
K. Pflaum ◽  
E. R. Tulman ◽  
J. Beaudet ◽  
X. Liao ◽  
K. V. Dhondt ◽  
...  
Keyword(s):  
Respiratory Tract ◽  
Mycoplasma Gallisepticum ◽  
Respiratory Pathogen ◽  
House Finch ◽  
Eastern United States ◽  
Content Type ◽  
House Finches ◽  
Domestic Poultry ◽  
Significant Difference ◽  
The Difference

ABSTRACT Mycoplasma gallisepticum, known primarily as a respiratory pathogen of domestic poultry, has emerged since 1994 as a significant pathogen of the house finch (Haemorhous mexicanus) causing severe conjunctivitis and mortality. House finch-associated M. gallisepticum (HFMG) spread rapidly and increased in virulence for the finch host in the eastern United States. In the current study, we assessed virulence in domestic poultry with two temporally distant, and yet geographically consistent, HFMG isolates which differ in virulence for house finches—Virginia 1994 (VA1994), the index isolate of the epidemic, and Virginia 2013 (VA2013), a recent isolate of increased house finch virulence. Here we report a significant difference between VA1994 and VA2013 in their levels of virulence for chickens; notably, this difference correlated inversely to the difference in their levels of virulence for house finches. VA1994, while moderately virulent in house finches, displayed significant virulence in the chicken respiratory tract. VA2013, while highly virulent in the house finch, was significantly attenuated in chickens relative to VA1994, displaying less-severe pathological lesions in, and reduced bacterial recovery from, the respiratory tract. Overall, these data indicate that a recent isolate of HFMG is greatly attenuated in the chicken host relative to the index isolate, notably demonstrating a virulence phenotype in chickens inversely related to that in the finch host.

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