Université de Fribourg

Removal of a subset of non-essential genes fully attenuates a highly virulent mycoplasma strain

Jores, Joerg ; Ma, Li ; Ssajjakambwe, Paul ; Schieck, Elise ; Liljander, Anne ; Chandran, Suchismita ; Stoffel, Michael H. ; Cippa, Valentina ; Arfi, Yonathan ; Assad-Garcia, Nacyra ; Falquet, Laurent ; Sirand-Pugnet, Pascal ; Blanchard, Alain ; Lartigue, Carole ; Posthaus, Horst ; Labroussaa, Fabien ; Vashee, Sanjay

In: Frontiers in Microbiology, 2019, vol. 10, p. -

Mycoplasmas are the smallest free-living organisms and cause a number of economically important diseases affecting humans, animals, insects, and plants. Here, we demonstrate that highly virulent Mycoplasma mycoides subspecies capri (Mmc) can be fully attenuated via targeted deletion of non-essential genes encoding, among others, potential virulence traits. Five genomic regions, representing...

Université de Fribourg

Reproduction of contagious caprine pleuropneumonia reveals the ability of convalescent sera to reduce hydrogen peroxide production in vitro

Liljander, Anne ; Sacchini, Flavio ; Stoffel, Michael H. ; Schieck, Elise ; Stokar‑Regenscheit, Nadine ; Labroussaa, Fabien ; Heller, Martin ; Salt, Jeremy ; Frey, Joachim ; Falquet, Laurent ; Goovaerts, Danny ; Jores, Joerg

In: Veterinary Research, 2019, vol. 50, no. 1, p. 10

Contagious caprine pleuropneumonia (CCPP), caused by Mycoplasma capricolum subsp. capripneumoniae is a severe disease widespread in Africa and Asia. Limited knowledge is available on the pathogenesis of this organism, mainly due to the lack of a robust in vivo challenge model and the means to do site-directed mutagenesis. This work describes the establishment of a novel caprine challenge...

Université de Fribourg

Field-applicable recombinase polymerase amplification assay for rapid detection of Mycoplasma capricolum subsp. capripneumoniae

Liljander, Anne ; Yu, Mingyan ; O'Brien, Elizabeth ; Heller, Martin ; Nepper, Julia F. ; Weibel, Douglas B. ; Gluecks, Ilona ; Younan, Mario ; Frey, Joachim ; Falquet, Laurent ; Jores, Joerg

In: Journal of Clinical Microbiology, 2016, vol. 53, no. 9, p. 2810–2815

Contagious caprine pleuropneumonia (CCPP) is a highly contagious disease caused by Mycoplasma capricolum subsp. capripneumoniae that affects goats in Africa and Asia. Current available methods for the diagnosis of Mycoplasma infection, including cultivation, serological assays, and PCR, are time-consuming and require fully equipped stationary laboratories, which make them incompatible with...

Université de Fribourg

Complete genome sequences of virulent mycoplasma capricolum subsp. capripneumoniae strains F38 and ILRI181

Falquet, Laurent ; Liljander, Anne ; Schieck, Elise ; Gluecks, Ilona ; Frey, Joachim ; Jores, Joerg

In: Genome Announcements, 2014, vol. 2, no. 5, p. e01041–14

Contagious caprine pleuropneumonia (CCPP) caused by Mycoplasma capricolum subsp. capripneumoniae is a severe epidemic affecting mainly domestic Caprinae species but also affects wild Caprinae species. M. capricolum subsp. capripneumoniae belongs to the “Mycoplasma mycoides cluster.” The disease features prominently in East Africa, in particular Kenya, Tanzania, and Ethiopia. CCPP also...