As with the series' parent show Wallace and Gromit, there are many allusions to other aspects of popular culture and movies such as Star Wars, The Lion King, E.T.: The Extra-Terrestrial, The Matrix, and Pulp Fiction. 1  These include: 2  Shirley's training in the episode Shape Up with Shaun is based on the film Rocky.
Many pathogenic bacteria exist in nature as multiple antigenic types or serotypes, meaning that they are variant strains of the same pathogenic species. For example, there are multiple serotypes of Salmonella typhimurium based on differences in cell wall (O) antigens or flagellar (H) antigens.any pathogenic bacteria exist in nature as multiple antigenic types or serotypes, meaning that they are variant strains of the same pathogenic species. For example, there are multiple serotypes of Salmonella typhimurium based on differences in cell wall (O) antigens or flagellar (H) antigens.
Antigenic variation is exhibited by a number of highly pathogenic microorganisms including human viruses, bacteria, fungi and unicellular protozoans.Antigenic variation poses challenges to vaccine development against microorganisms causing major public health problems globally.ahoon LA and Seifert S (2011) Focussing homologous recombination: pilin antigenic variation in the pathogenic Neisseria. Molecular Microbiology 81(5): 1136â1143. Citti C and Rosengarten R (1997) Mycoplasma genetic variation and its implication for pathogenesis. Wiener Klinische Wochenschrift 109(14â15): 562â568.