A variety of
diseases can be caught from oiled wildlife, including viral, bacterial,
fungal and parasitic diseases. Additionally, individuals may develop
allergic reactions.
- NOTE: Any individual becoming ill while, or within a few
weeks
of, tending oil contaminated animals, should take care to inform their
medical practitioner about the exposure to wild animals. (B363.2.w2)
- Good personal hygiene, good animal handling techniques, appropriate
protective equipment and current tetanus vaccinations are all
important in minimising zoonotic risks. (J29.8.w1,
P24.335.w12)
- Appropriate protective clothing should be worn, including, if
necessary, masks. (D160.5.w5)
The following list indicates the common, and some rarer, disease risks
to humans handling wild animals.
BACTERIAL INFECTIONS
Salmonellosis
- This is a relatively common zoonosis (D9,
B335.14.w14) and
is the most common zoonosis in developed countries (B12.22.w13)
- Salmonella typhimurium is the commonest problem. (B363.2.w2)
- The commonest route of infection is faeco-oral. (B335.14.w14,
B363.2.w2;
D9, D183.w8), this
may occur by contamination of food or water, or via fomites.
(B12.22.w13, B23.22.w5)
- Salmonellosis causes gastroenteritis with abdominal pain and severe
diarrhoea in humans. (B12.22.w13,
B23.22.w5,
B335.14.w14)
- Gallinaceous birds, waterfowl and seagulls very commonly carry
salmonellae, but it is not uncommon in other species also. (B23.22.w5)
- Salmonellosis is an important potential zoonotic hazard from marine
mammals. (D183.w8)
- Salmonellae have been isolated from apparently health marine
mammals. (J4.173.w1)
- Prevention: Strict hygiene is recommended to minimise the
risk of salmonellosis. (B363.2.w2,
D183.w8)
- Eating, drinking and smoking in animal areas should not be
permitted. (B363.2.w2)
- Personnel should wash hands thoroughly before eating, drinking
or smoking. (B363.2.w2)
- See also:
Avian Tuberculosis
- Infection in humans is usually rare; infection is most likely to occur
in those with compromised immune systems. (B12.22.w13,
P24.327.w4)
- Human infection may occur by kissing of, or close contact with,
infected birds, such that sufficient numbers of infective organisms
are inhaled or ingested. (P24.334.w4)
- See also:
Pseudotuberculosis
- Caused by Yersinia pseudotuberculosis, many birds may act as
hosts, particularly columbiformes (pigeons and doves). (B23.22.w5)
- Infection is by the faeco-oral route and is most likely with poor
hygiene. (P24.334.w4)
- In humans the main signs include acute mesenteric lymphadenitis,
fever, gastroenteritis and erythema nodosum. (B12.22.w13,
B23.22.w5)
- See also:
Chlamydiosis (Ornithosis, Psittacosis)
- This is one of the most important bird-related zoonoses. (P24.327.w4)
- This disease, which causes severe 'flu-like illness with high fever, headache, debility and shortness of
breath in humans, is
transmitted by inhalation of airborne particles of droppings and other
discharges (oral, ocular) from birds. (B12.22.w13,
B23.22.w5,
B363.2.w2, D48)
- Risk of infection is increased in immunocompromised individuals. (P24.334.w4)
- Note: This disease may be fatal in humans if not treated. (D48).
- Prevention: Good ventilation in all bird holding areas, and
good general hygiene, are recommended. (B363.2.w2)
- See also:
Campylobacteriosis
- This may be found in many wild birds but particularly in scavengers
such as seagulls and crows. (B12.22.w13,
B23.22.w5)
- Transmission is by the faeco-oral route (usually from contaminated
food) and in humans the main signs
are of gastroenteritis. (B23.22.w5,
P24.334.w4)
- See also:
Erysipelothrix infection
Erysipelothrix rhusiopathiae
may be found in the mouth of marine
mammals and birds. Infections in humans, from contamination of bites or
cuts, may be superficial but can cause serious localised bacterial
infection and, if not treated properly, systemic infection.
(B20.13.w10)
- Erysipelothrix rhusopathiae is also found in the slime layer
of fish (B363.2.w2)
- This organism causes disease in birds and can be transmitted to
humans either by direct contact or by contaminated fomites. (B23.22.w5)
- In humans this organism causes a cutaneous (skin) nodule. (B23.22.w5)
- Prevention:
- Wear gloves when handling fish. (B363.2.w2)
- See also:
Leptospirosis
- Leptospira interrogans serovar pomona has been
transmitted from marine mammals (sea lions) to humans and caused
zoonotic illness. (J4.173.w1)
Miscellaneous wound-associated:
- Various bacterial infections may occur associated with exposure of
open wounds to bacteria present on the animals or in the environment.
(D183.w8,
B335.14.w14)
VIRAL INFECTIONS
Avian Influenza
- This is a rare zoonosis. Transmitted by aerosol, it can cause
respiratory signs in humans. (B23.22.w5)
- Signs in humans vary from mild to severe and fatal pneumonia. (P24.334.w4)
- Influenza A viruses are common in birds such as migratory waterfowl.
(P24.327.w4)
- During the recent (2003-2004) outbreaks of avian influenza in Asia,
several case of direct transmission of H5N1 avian influenza virus to humans have occurred, and many
such case have been fatal. (J6.33.w1)
- See also:
Newcastle Disease
- This is a rare zoonosis. Transmitted by aerosol, it can cause
sinusitis and conjunctivitis in humans, and occasionally a flu-like
illness. (B12.22.w13,
B23.22.w5, P24.327.w4)
- Virulent strains are more likely to be transmitted to humans. (P24.327.w4)
- See also:
Rabies:
- This disease must be considered if working with mammals in areas in
which this disease occurs.
- In the UK classical rabies is not present however European lyssa virus
2 (EBLV-2) appears to be
present, although to date it has been found only in Daubenton's bats (Myotis
daubentonii - Daubenton's bat). (J3.153.w1)
- One bat worker in the UK has died following exposure to EBLV-2
from a Myotis
daubentonii - Daubenton's bat in the UK.
- It is recommended that all bat
workers, and those involved with bat rehabilitation, should be properly immunised
(prophylactic vaccination) against rabies. (B284.9.w9)
- Anyone who has not been vaccinated and is then bitten by a bat (Rhinolophidae
spp. and Vespertilionidae
spp.) should seek post-exposure vaccination. (B284.9.w9)
- There is no evidence to date of rabies transmission from any
bird to humans, although rabies has been induced in birds
experimentally. (B12.22.w13)
- See also: Rabies (with special reference to Waterfowl, Hedgehogs and the disease in the UK)
Seal pox (B20.13.w10)
- Humans may become infected through skin abrasions.
- Prevention: Risk of infection may be decreased by wearing protective clothing and gloves when
handling seals
- (B156.12.w12,
B222, J3.134.w3)
- See also: Sealpox Virus Infection
FUNGAL INFECTIONS
Aspergillosis
- This fungal disease is commonly seen on necropsy of oiled birds; it
can cause large numbers of bird deaths. (B363.2.w2)
- In humans this disease is mainly a threat to immunocompromised
individuals. (B12.22.w13,
B363.2.w2)
- Catching this disease directly from birds is unlikely, except during
bird necropsy, when spores from the carcass could be inhaled. (B12.22.w13,
B23.22.w5, P24.327.w4,
P24.334.w4)
- In general, humans may become exposed from the same environmental
sources as may cause infection in birds. (B12.22.w13,
, B23.22.w5)
- Prevention:
- Good air flow should be maintained in all areas where birds are
housed. (B363.2.w2)
- Protective face masks should be worn while birds are necropsied.
(B23.22.w5, B363.2.w2)
- See also:
Dermatophytoses
- Various fungal infections of wild animals may also cause infection
in humans. (B23.22.w5)
- Transmission is by direct contact. (B23.22.w5)
- Fungal infections of birds, such as Trychophyton gallinae and
Microsporum gypseum infections, may result in round, swollen,
erythematous plaques in humans. (B23.22.w5,
P24.334.w4)
- Secondary infection may occur. (P24.334.w4)
- Transmission of ringworm is more likely to be from mammals than from
birds. (P24.327.w4,
P24.334.w4)
- See also:
PARASITIC INFECTIONS
External parasites: lice and mites
- Lice and mites from birds generally survive on humans for only a few
days. (B363.2.w2)
- Skin lesions and erythema may develop. (P24.334.w4)
- Some people may develop an allergic dermatitis in response to these
parasites. (P24.327.w4,
P24.334.w4)
- Prevention: Normal hygienic practices, such as wearing
gloves, regular changes of clothes, and hand washing, should minimise
the risks of picking up parasites. (B363.2.w2)
ALLERGIC DISEASES
There is a risk of allergic disease during oiled wildlife response. (D183.w8)
Feather Allergies
- Humans allergic to bird feather dander or avian faecal material may
develop a clear nasal oculonasal discharge and sneezing; the diagnosis
can be confirmed by skin testing. Symptoms can be treated using
antihistamines. (B23.22.w5)
Bird Breeder's Lung (Allergic alveolitis, pigeon lung disease)
- Caused by inhalation of feather dander and/or droppings, this
disease occurs in acute, subacute and chronic forms in humans, causing
dry cough, dyspnoea, reduced pulmonary function and weight loss. (B12.22.w13,
B23.22.w5)
-
Malaise, chills, fever, shortness of breath, myalgia and coughing may
occur in affected individuals. (B12.22.w13)
- Coughing, dyspnoea and fever may be seen in the acute form following
exposure to large quantities of allergen, while dry cough and
progressive dyspnoea are seen with the subacute and chronic disease. (B23.22.w5)
- The acute form may be seen four to eight hours after the
individual has been exposed to a high level of allergen. (B12.22.w13,
P24.334.w4)
- The chronic form is seen following long-term low-dose exposure
to the avian antigens. (B12.22.w13)
-
Recovery from the acute or subacute forms is usual if contact with the
allergen is prevented, but irreversible pulmonary fibrosis may occur
in chronic disease. (B23.22.w5)
- Individuals with this condition should avoid exposure to dust from
dried bird droppings. (P24.327.w4)
Latex and Other Allergies and Reactions
- Individuals may develop reactions to materials which are used during
oil spill response such as latex gloves, the powder in gloves, and
disinfectants. (D223,
W599.Nov05.w1,
V.w5, V.w73)
- Reactions may include: (D223,
W599.Nov05.w1)
- Irritant contact dermatitis. Not strictly an allergic
reaction, this generally manifests as the development of dry,
itchy, irritated areas of skin, usually on the hands. It may
result from contact with latex, powder used in gloves, repeated
hand washing and drying, incomplete hand drying, use of cleansers
and sanitisers etc.
- Allergic contact dermatitis (delayed hypersensitivity
reaction/Type IV hypersensitivity reaction). This is seen as a
rash, usually starting 24 to 48 hours after contact with the
sensitising agent (such as chemicals used in the manufacture of
latex gloves) but sometimes starting as soon as six hours after
contact. It may spread and may progress to the development of
oozing blisters on the skin.
- Immediate hypersensitivity (Type I hypersensitivity
reaction/latex allergy). Reactions may begin within minutes to
hours after contact. In sensitised individuals, reactions may be
triggered by very low level exposure to natural rubber latex
proteins.
- Mild reaction: skin reaction involving redness, development
of hives and itching.
- Serious reaction: respiratory signs e.g. runny nose,
sneezing, itchy eyes, scratchy throat, asthma type signs
(breathing difficultly, wheezing, coughing spells).
- Anaphylactic shock. A rare reaction, potentially life
threatening, with a severe drop in blood pressure which may
lead to breathing difficulties and/or loss of consciousness.
(D223,
W599.Nov05.w1)
- Note:
- Individuals who are aware they have latex allergy should inform
their employers and healthcare providers about their allergy.
Additionally, it is recommended that they should wear Medic-Alert
bracelet stating that this person has natural latex rubber
allergy. (W599.Nov05.w1,
W599.Nov05.w2)
- In the UK, the Health & Safety at Work Act 1974 puts a duty
on employees to take reasonable care for his or her own safety. (W599.Nov05.w2)
- In the UK, the Health & Safety at Work Act 1974 puts a
general duty on employers to keep employees and others health and
safe at work and the Control of Substances Hazardous to Health
Regulations 2002 ask employers to undertake an assessment of any
substances used at work and that are hazardous to health - this
includes natural latex rubber. (W599.Nov05.w2)
- This assessment should include not wearing gloves where they
are not needed, using other glove materials such as nitrile,
vinyl or synthetic gloves where appropriate, and limiting
exposure to natural latex rubber gloves. HSE's policy is
"Single use, disposable natural rubber latex gloves may be used where a risk assessment has identified them as necessary. When they are used they must be low-protein and
powder-free." (W599.Nov05.w2)
- In the USA, recommendations are provided by National Institute
for Occupational Safety and Health (CDC).
Prevention of Zoonotic Disease:
The risks of zoonotic disease can be substantially reduced by the
application of basic sanitary precautions, including ensuring good ventilation and by normal good hygiene
practices. (B363.2.w2,
D9)
- Separate clothing should be worn for handling and caring for
wildlife. (B23.22.w5)
- Clothes should be changed regularly. (B363.2.w2)
- Avoid unnecessary close contact with birds, particularly cuddling
and kissing; (P24.327.w4)
and particularly avoid close contact between birds and anyone who may be
immunodeficient or immunocompromised, including children and the
elderly. (P24.327.w4)
- Maintain strict personal hygiene. (P24.327.w4)
- Gloves should be worn when handling animals. (D9)
- Hands should be washed frequently. (B335.14.w14)
- Eating, drinking and smoking should not be allowed in animal
handling areas. (B335.14.w14,
D135.2.w2)
- Protective equipment should be removed and hands should be
washed thoroughly with soap and water
(or approved cleansers) after working with casualties or cleaning
pens/cages and before eating, drinking or smoking, or handling
food for human consumption,
including at rest breaks as well as at the end of a work shift/after finishing work. (B23.22.w5,
B363.2.w2, D9,
D135.2.w2)
- Soap and warm water should be available at all locations
where human food and drink are provided, as well as near
toilets. (B363.2.w2)
- Wear gloves when handling dead birds. (P24.327.w4)
- Wear appropriate protective clothing when carrying out necropsies. (P24.327.w4)
- If zoonotic disease is suspected then necropsy should be carried
out under a hood, or appropriate personal protective equipment
should be worn, such as a respirator and goggles in addition to
gloves and other protective clothing. (B23.22.w5,)
- When birds which appear to be diseased are being handled, appropriate
respiratory protection (surgical mask) should be worn in addition to
other personal protective equipment. (D135.2.w2)
- Facilities should be kept clean. (D135.2.w2)
- Ventilation should be maintained at an adequate level to prevent
buildup of airborne contaminants. (D135.2.w2)
- Minimise production of aerosols and dust and contact with either of
these. (P24.327.w4)
- Ensure that the use of appropriate disinfectants and antiseptics
against zoonotic diseases is understood. (P24.327.w4)
- Surfaces, including floors, counters etc. should be cleaned and
disinfected frequently. (D135.2.w2)
- Equipment used in food preparation should be cleaned and
disinfected frequently. (D135.2.w2)
- Ensure there is an adequate personnel health programme in place. (P24.327.w4)
- All cuts, scratches and abrasions should be treated immediately
with a disinfectant and
reported to the appropriate supervisor. (B363.2.w2,
D135.2.w2)
- Individuals with open wounds should not have contact with either
wildlife casualties or chemical contaminants. (D135.2.w2)
- Individuals should also avoid getting exhausted, as exhaustion may
lead to reduced immune system function and increase susceptibility to
disease. (B363.2.w2)
- Anyone developing illness or symptoms such as respiratory discomfort,
dizziness, irritation of the skin or eyes, nausea or vomiting should
stop work and report their illness to their supervisor immediately. (D135.2.w2)
- Anyone becoming ill should inform their doctor that they have been
working with birds and petroleum products. (P24.327.w4,
D135.2.w2)
- Note: All personnel handling wildlife should be up-to-date in tetanus
immunisation due to the potential for puncture wounds. (D135.2.w2)
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