Housefly (Musca domestica) mouth apparatus - permanent slide plate under high magnification
Dog fleas (Ctenocephalides canis (Curtis, 1826)) in a dog's hair clump
Cat flea (Ctenocephalides felis (Bouche, 1835)) in a cat's hair clump
Colorful stars (vector pattern)
Dog fleas (Ctenocephalides canis (Curtis, 1826)) in a dog's hair clump
Warning sign saying "Warning! Do not utilize discarded face mask unproperly - vector of COVID-19 infection" against a used face mask on the street crossed by a quarantine tape