Answers
What are the key factors affecting pathogenicity? - ✔✔Virulence, infectivity, toxigenicity,
antigenicity, coinfection, and superinfection.
What distinguishes obligate pathogens from facultative pathogens? - ✔✔Obligate pathogens
must infect a host to survive, while facultative pathogens can survive without a host.
What are the main types of pathogens? - ✔✔Bacteria, viruses, rickettsiae, mycoplasmas,
Chlamydiae, fungi, protozoa, and helminths.
What is septicemia? - ✔✔The presence of bacteria in the bloodstream.
What are common systemic manifestations of infection? - ✔✔Fever, weakness, headache,
malaise, anorexia, and nausea.
What are local manifestations of infection? - ✔✔Heat, incapacitation, pain, edema, redness,
lymphadenitis, and purulent exudate.
What laboratory tests are used to diagnose infections? - ✔✔White blood cell count,
leukocytosis, leukopenia, serum antibody levels, cultures, and sensitivities.
What are the clinical manifestations of influenza? - ✔✔Fever, body aches, weakness, malaise,
cough, sore throat, nasal congestion, and chills.
How is tuberculosis transmitted? - ✔✔Through inhaled airborne droplets.