| H H H H H | letter |
| Haemophilus | chapter 9 | micro 509 | heading |
| Haemophilus influenzae | chapter 9 | micro 509 | heading |
| Haemophilus influenzae (wave) | supplement | micro 509 | wave |
| Halogens | chapter 12 | micro 509 | heading |
| Halophiles | chapter 6 | micro 509 | heading |
| Hapten | chapter 17 | micro 509 | heading |
| Heat | chapter 12 | micro 509 | heading |
| Heat fixing | chapter 3 | micro 509 | heading |
| Heat, dry | chapter 12 | micro 509 | heading |
| Heat, moist | chapter 12 | micro 509 | heading |
| Heavy metals | chapter 12 | micro 509 | heading |
| Helical, Gram-negative, aerobic, motile bacteria | chapter 9 | micro 509 | heading |
| Helicobacter | chapter 9 | micro 509 | heading |
| Helicobacter pylori | chapter 9 | micro 509 | heading |
| Helicobacter pylori (wave) | supplement | micro 509 | wave |
| Helminths | chapter 11 | micro 509 | heading |
| Helminths (introduction) | chapter 1 | micro 509 | heading |
| HEPA filters | chapter 12 | micro 509 | heading |
| Hepatitis B vaccine | chapter 17 | micro 509 | heading |
| Heredity | chapter 7 | micro 509 | heading |
| Heterotroph | chapter 5 | micro 509 | heading |
| Heterotrophic plate count | chapter 6 | micro 509 | heading |
| Histamine | chapter 18 | micro 509 | heading |
| History of microbiology | chapter 1 | micro 509 | heading |
| HIV | chapter 18 | micro 509 | heading |
| HIV antibody test | chapter 18 | micro 509 | heading |
| HIV epidemeology | chapter 18 | micro 509 | heading |
| HIV vaccination | chapter 18 | micro 509 | heading |
| Homolactic-acid fermentation | chapter 5 | micro 509 | heading |
| Homology, genetic | chapter 9 | micro 509 | heading |
| Hooke, Robert (~1665) | chapter 1 | micro 509 | heading |
| Horizontal transfer of DNA | chapter 8 | micro 509 | heading |
| Horizontal transmission | chapter 15 | micro 509 | heading |
| Host defences, non-specific | chapter 16 | micro 509 | heading |
| Host defenses | chapter 16 | micro 509 | heading |
| Host defenses, constitutive | chapter 16 | micro 509 | heading |
| Host range | chapter 10 | micro 509 | heading |
| Host specificity | chapter 11 | micro 509 | heading |
| Host, definitive | chapter 11 | micro 509 | heading |
| Host, intermediate | chapter 11 | micro 509 | heading |
| Host-Microbe Relationships and Disease Processes | chapter 14 | micro 509 | chapter title |
| Hosts, compromised | chapter 15 | micro 509 | heading |
| Hosts, reservoir | chapter 11 | micro 509 | heading |
| How microbes cause disease | chapter 14 | micro 509 | heading |
| Human immunodefeciency virus | chapter 18 | micro 509 | heading |
| Humoral immunity | chapter 17 | micro 509 | heading |
| Hybridization, DNA | chapter 9 | micro 509 | heading |
| Hybridomas | chapter 8 | micro 509 | heading |
| Hydrogen bonds | chapter 2 | micro 509 | heading |
| Hydrogen ion | chapter 2 | micro 509 | heading |
| Hydrophilic | chapter 2 | micro 509 | heading |
| Hydrophilicity | chapter 2 | micro 509 | heading |
| Hydrophobic | chapter 2 | micro 509 | heading |
| Hydrophobicity | chapter 2 | micro 509 | heading |
| Hydroxyl ion | chapter 2 | micro 509 | heading |
| Hypersensitivity | chapter 18 | micro 509 | heading |
| Hypersensitivity, cell-mediated | chapter 18 | micro 509 | heading |
| Hypersensitivity, cytotoxic | chapter 18 | micro 509 | heading |
| Hypersensitivity, delayed | chapter 18 | micro 509 | heading |
| Hypersensitivity, immediate | chapter 18 | micro 509 | heading |
| Hypersensitivity, immune complex | chapter 18 | micro 509 | heading |
| Hypersensitivity, Type I | chapter 18 | micro 509 | heading |
| Hypersensitivity, type II | chapter 18 | micro 509 | heading |
| Hypersensitivity, type III | chapter 18 | micro 509 | heading |
| Hypersensitivity, type IV | chapter 18 | micro 509 | heading |
| Hypertonic | chapter 4 | micro 509 | heading |
| Hyphae | chapter 11 | micro 509 | heading |
| Hypochlorite ion | chapter 12 | micro 509 | heading |
| Hypotonic | chapter 4 | micro 509 | heading |