Salmonella sppSay no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”? Get the original essay The immune system is built to defeat all bacteria that may pose a threat to the body. However, salmonella knows when it enters the host's body and can change its behavior to deal with our immune system, cause infection, and spread throughout the body to cause disease. The immune system is built to detect any type of bacteria, then digest and kill it. When the bacteria enters the host body, it comes into contact with two lines of defense of our immune system. The first in line will be the innate immune system which will be immediately ready to fight the bacteria and prevent it from spreading. The second line that bacteria will encounter in our body is called the adaptive immune system, which can take a few days to develop, however, when fully developed, it sends out T cells to recognize the type of bacteria. After recognizing which bacteria it is, it allows it to memorize it for future infection, then attack it and thus kill it. Mycobacterium bovis If the mycobacterium entered the body through inhalation of infected droplets, the alveolar macrophage will be the first phagocytic. cell involved in the destruction of mycobacteria by the fusion of phagolysosomes. If the cell manages to invade and kill the bacteria, no infection will occur. However, if the cell is overcome by the mycobacteria, the animal will become infected and develop the disease. When this happens, dendritic cells and monocytes will attempt to prevent the infection from participating in the phagocytic process. In fact, the macrophage cell is one of the favorite cells of mycobacteria, but at the same time it is also responsible for the control and destruction of these pathogens.Microsporum canisWhen microsporum canis has infected the organism, the first line of defense it will encounter In our body, as a form of immune system, there is non-specific immunity which contains mechanisms that build an immediate natural barrier. It will also encounter a local defense mechanism which contains: unsaturated transferrin, phagocytosis by polymorphonuclear leukocytes and medium chain fatty acids produced in sebum. Next, the fungi will encounter T cells that help B cells kill infected cells. However, cell-mediated immune response plays a major role in combating fungi with a positive outcome. Aspergillus sppIf the host has a weakened immune system, which may be caused by immunosuppressive therapy before organ transplantation or if there is pre-existing lung dysfunction which may be caused by asthma, cystic fibrosis, etc., fungi will exploit these weaknesses, which can lead to saprophytic, allergic or invasive aspergillosis. The innate immune response should prevent conidia from growing and forming invasive hyphae that can penetrate lung tissue. However, if the innate immune response fails to prevent conidia from developing anatomical barriers such as the mucociliary elevator, professional phagocytes and neutrophils will arrest fungal development by inhibiting the growth of conidia and hyphae. Canine parvovirus When the host gets infected with canine parvovirus, the immune system recognizes the antigen of the virus and begins to produce the IgG and IgM antibodies that are specified in the antigens of the virus..