microbes and water part 1

Question 1

which liquid is suitable or the safest to drink?

Answer 1

potability

Question 2

what does unpolluted water contain?

Answer 2

it contains low organic nutrients and low numbers of microbes

Question 3

what is the list of things water can be polluted with?

Answer 3

• sewage
• agricultural runoff
• industrial pollutants

Question 4

what is polluted water high in?

Answer 4

it is high in organic matter, coliform and noncoliform bacteria.

Question 5

organic matter derives from?

Answer 5

sewages,feces and industrial sources

Question 6

what happens when phosphates accumulate?

Answer 6

when they accumulate, algae reproduce rapidly and these algae blooms supply nutrients to other microorganisms, which multiplies quickly and use up oxygen

Question 7

aquatic plants and animals die and accumulate to the bottom, due to to the absence of?

Answer 7

oxygen

Question 8

what is thermocline?

Answer 8

it is the transition between surface water and deep water layers.

Question 9

what are the tree types of pollution?

Answer 9

Physical, chemical and biological

Question 10

how does chemical pollution occur?

Answer 10

when inorganic and organic waste enter water

Question 11

what is the type of pollution that occurs when microorganisms enter water through human anthropogenic sources (human activities)

Answer 11

biological pollution

Question 12

what is physical pollution?

Answer 12

when sand, soil or cyanobacterial bloom clouds water

Question 13

what is biological oxygen demand?

Answer 13

it is a measurement of the amount of dissolved oxygen content that is used by microorganisms when decomposing organic matter in water.

Question 14

Biological oxygen demand (BOD) is used to determine?

Answer 14

pollution status of water

Question 15

what happens when a water body has high biological oxygen demand?

Answer 15

a high BOD means it will support rapid growth of microbial

Question 16

what are eutrophics?

Answer 16

water overloaded with nutrients

Question 17

which diseases are spread by contaminated water?

Answer 17

• shigellosis
• typhoid fever
• cholera
• legionnaires disease

Question 18

what infection occurs when a wound infection is contaminated by a marine pathogen

Answer 18

Erysipeloid

Question 19

what is fish handler’s disease?

Answer 19

when a cut or wound becomes affected by a mycobacterium marinum

Question 20

which gram- negative bacteria causes intestinal illness if consumed in raw oysters

Answer 20

vibrio vulnifucs.

Question 21

which type of viruses can water transmit?

Answer 21

• hepatitis A
• rotavirus
• gastroenteritis
• polio virus

Question 22

what kind of eukaryotic microorganisms can water transfer?

Answer 22

• entamoeba histolytica
• cryptosporidium
• gardia lamblia

Question 23

true or false can water transmit dinoflagellates, which causes cigutera poisoning in humans?

Answer 23

true

Question 24

what is ciguatera?

Answer 24

when humans consume contaminated fish which causes neurological muscular intoxication

Question 25

which gram-negative rod shape bacteria resides in the intestines of farm cattle and pig?

Answer 25

fecal coliforms

Question 26

what is the usual indicator organisms for fecal contamination in our drinking water?

Answer 26

E.coli

Question 27

which organism group are apart of our gut flora, soils etc.?

Answer 27

coliforms

Question 28

what is the total count plate?

Answer 28

is used to count how many bacteria, mold etc. will grow in aerobic conditions.

Question 29

what is the MPN test (most probable number)

Answer 29

a test usually used for samples with a low # of organisms or that will not grow on agar media

Question 30

what is the colony-forming units?

Answer 30

it forms colonies of the bacteria that will help us count how much original number of bacteria was in the sample

Question 31

turbidity?

Answer 31

is cloudiness in a broth culture medium